{"assessment_date":"2026-10-17","crs":"EPSG:4326","coordinate_order":"longitude, latitude","uncertainty_policy":"Visible radii are conservative editorial search envelopes, not measured field accuracy, confidence intervals, or guaranteed containment. Original context and map precision are independent.","records":[{"schema_version":"1.0-site-position-audit","case_id":"catez-iljug-1176-primary-setting","assessed_on":"2026-10-17","new_sources":[{"id":"mileusnic-jovanovic2018-catez-position","title":"Zrinka Mileusnić and Alenka Jovanović, Čateški grič, Arheologija na avtocestah Slovenije 78 (Ljubljana 2018)","url":"https://www.zvkds.si/wp-content/uploads/2024/03/cateski_gric_splet.pdf","locator":"p.7 figs.3–4; p.8 figs.5–6; p.9 fig.7; p.10 milestone context;  one-based","consultation":"Official ZVKDS full monograph downloaded; relevant text and rendered survey/topographic, cadastral and orthophoto plans inspected. The plans locate modern archaeological sites and the highway corridor; they do not mark the 1958/1959 milestone seating.","consulted":true,"consulted_on":"2026-10-17","sha256":"41fa8efa8ff4a2c46a36e7d0c0b9a0af033e1179c220139835a59842641ac1a5","locator_status":"Published page locator supplied in the recorded citation; verification and reuse limits remain separate."},{"id":"gustin-olic-cateski-survey-anchor","title":"Mitja Guštin and Slobodan Olić, Čateški Grič, in The Earth Beneath Your Feet: Archaeology on the Motorways in Slovenia, catalogue pp.114–116 (English extract; title-page date not inspected)","url":"https://www.eheritage.si/DDC/DDC_020_024_NDSFNHAGWTBZIWVHRDDTUQKNTGMGFK.pdf","locator":"p.114 opening location table and aerial photograph; three-page official heritage extract, ","consultation":"Official eHeritage extract downloaded; coordinate table and aerial photograph visually inspected. Its x546560 y83377 coordinate is the Čateški Grič archaeological-site survey anchor, not a milestone coordinate.","consulted":true,"consulted_on":"2026-10-17","sha256":"473247044e31c1c61918687b8fd53942ce18c6023e3f23dc0cfa6d77fa4ba7e0","locator_status":"Published page locator supplied in the recorded citation; verification and reuse limits remain separate."},{"id":"rkd11434-context-geometry","title":"Ministry of Culture of Slovenia, eVRD / Register: EID1-11434, Čatež ob Savi – Arheološko najdišče Čateški grič","url":"https://geohub.gov.si/ags/rest/services/MK/MK_EVRD/MapServer/0/query?where=ESD%3D11434&outFields=*&outSR=4326&f=pjson","locator":"OBJECTID28479; EID1-11434; ESD11434; STANJE_POD 17-10-2026; geometry returned in WGS 84","consultation":"Official GIS query downloaded and inspected. The transformed published survey anchor falls inside this registered hill-site boundary. The registered boundary is not a boundary of the milestone findspot.","consulted":true,"consulted_on":"2026-10-17","sha256":"0c87aaebb398be1d81c7518766e67da03a76583c536e9ebe2b126b941e73c4a8"},{"id":"pmb-official-museum-position","title":"Posavski muzej Brežice, official museum visitor information and directions","url":"https://www.pmb.si/muzej","locator":"Museum description and Navodila za pot link; directions destination !1d 15.5925453!2d 45.9018202; official institutional address Cesta prvih borcev1, Brežice","consultation":"Official museum page and HTML directions link inspected. The destination coordinate identifies the museum institution in Brežice Castle; it does not identify a storeroom, the fragments or current display status.","consulted":true,"consulted_on":"2026-10-17","sha256":"bbb6454172780a6bedac07716842cc246e01aaae3f6718d29ddf79305bc1a556"},{"id":"catez-replica-local-report2024","title":"Rok Retelj, Ne bo jih več sram, Posavski obzornik XXVIII/11 (23 May 2024), p.7","url":"https://www.posavskiobzornik.si/datoteke/katalogTrgovina/1124.pdf","locator":"p.7, article on the village-square opening of6 May 2024","consultation":"Published newspaper article text inspected through the indexed full-page extract. It expressly reports a Roman-milestone replica made with Posavski muzej for the renewed village square; exact replica identity and surveyed position were not established.","consulted":true,"consulted_on":"2026-10-17"}],"location_updates":[{"id":"catez-iljug1176-original-station","role":"original-emplacement","label":"Original-setting search area: published Čateški Grič survey anchor; recovered seating not pinpointed","coordinates":[15.59518944,45.89303912],"coordinate_source":"gustin-olic-cateski-survey-anchor","source_ids":["petru1961-catez","lovenjak1997-context","mileusnic-jovanovic2018-catez-position","gustin-olic-cateski-survey-anchor","rkd11434-context-geometry"],"accuracy_m":600,"accuracy_note":"600m is an editorial search envelope around a published survey anchor. It represents the plausible western Čatež highway-cutting area, not measured positional error, a confidence interval or the location of the excavated seating.","precision_note":"Area locator only. The publication gives a site-survey anchor, not the milestone seating. The 600 m search envelope must remain visible; its centre must not be read as the original station.","status":"Ancient seating documented; broad original-setting search area mapped, exact station unresolved","comparison_eligible":false,"coordinate_fitness":"bounded-original-setting-search-area; unsuitable for point-to-road alignment tests","geometry_method":{"kind":"published-grid-context-anchor-with-editorial-envelope","summary":"Transform the published Čateški Grič survey anchor to WGS 84 and use it solely as the centre of a broad search envelope for the western Čatež cutting described in the milestone publications. No Itiner-e segment or nearest-road snapping was used.","source_ids":["petru1961-catez","mileusnic-jovanovic2018-catez-position","gustin-olic-cateski-survey-anchor","rkd11434-context-geometry"],"source_grid_label":"x546560 y83377 z187 as printed; numbers interpreted as easting546560m, northing83377m","source_crs":"EPSG:3912, MGI1901 / Slovene National Grid (D48/GK); CRS interpretation inferred and cross-checked against the published plans and official heritage boundary, not printed as an EPSG code in the table","source_coordinate":[546560,83377],"target_crs":"EPSG:4326; longitude, latitude","software":"pyproj3.6.1 / PROJ9.3.0; Transformer.from_crs(3912,4326,always_xy=True)","transformation":"Inverse Slovene National Grid + MGI1901 to WGS84(16), EPSG8688; coordinate-frame Helmert parameters476.08,125.947,417.81,-4.610862,-2.388137,11.942335,9.896638","unrounded_result":[15.595189438948056,45.89303911807762],"control_coordinates":[{"label":"Published Čateški Grič survey anchor; not milestone seating","source_coordinate":[546560,83377],"wgs84":[15.595189438948056,45.89303911807762],"source_id":"gustin-olic-cateski-survey-anchor"}],"cross_checks":["Derived anchor lies inside official EID1-11434 hill-site polygon; polygon bbox15.5878059821,45.8921112904,15.5962983366,45.8933733404.","Reading the same table numbers as EPSG3794 would give15.59991710,45.88865906, south of the mapped Čateški Grič hill; that alternative is inconsistent with the named-site plan context and is not admitted.","Mileusnić/Jovanović2018 pp.7–9 figs.4–7 provide highway/site context. No raster fit or invented 1950s station symbol is claimed."],"relative_constraints":["Petru1961 p.28: highway cutting a little over200m west of Čatež near Brežice.","Lovenjak1997 p.89: cutting for the Krška vas–Čatež road; ancient seating found beside the road remains.","Mileusnić/Jovanović2018 p.10: middle of the cutting between Čatež and Krška vas, east of prehistoric barrows near the Krka confluence."],"envelope_radius_m":600,"envelope_basis":"Conservative editorial envelope encompassing the mapped western-village highway cutting between the Krka-side archaeological area and the historic village edge. The unspecified historical settlement reference and absent station mark prevent a defensible smaller station buffer.","envelope_semantics":"Search area, not a probability distribution or excavation footprint; the context anchor itself does not assert a milestone find at its centre.","cardinal_extent_wgs84":[15.58745872,45.88764097,15.60292016,45.89843726],"source_independence":"The original-setting description and its later restatements are related; they do not constitute independent measurements of the station."}},{"id":"catez-iljug1176-museum","role":"repository","label":"Posavski muzej Brežice, Brežice Castle: institution proxy for reported fragment custody","coordinates":[15.5925453,45.9018202],"coordinate_source":"pmb-official-museum-position","source_ids":["petru1961-catez","edh-hd068538-local","lupa20898","pmb-official-museum-position"],"accuracy_m":100,"accuracy_note":"100m editorial institutional envelope; the official directions point is not an object-level survey.","precision_note":"Official museum destination coordinate. Shows the institution associated with published custody; present presence, storeroom and display position remain unverified.","status":"Published historical and 2012 photographic custody; institutional location verified, current object presence unconfirmed","comparison_eligible":false,"coordinate_fitness":"institution-proxy; no original-road alignment use","geometry_method":{"kind":"official-institution-directions-destination","summary":"Extract the destination coordinate, not the Google Maps viewport centre, from the museum's own Navodila za pot link.","source_ids":["pmb-official-museum-position"],"link_destination_fields":"!1d15.5925453!2d45.9018202","viewport_centre_rejected":[15.5225143,45.901843],"envelope_radius_m":100,"envelope_semantics":"Editorial institution-scale display radius, not measured positional error"}}],"new_locations":[],"case_updates":{"location_status":"Ancient seating documented in the western Čatež highway cut. A600m published-survey-anchor search area now locates the setting broadly; it does not pinpoint the seating. Fragment-custody museum is mapped separately as an institution proxy.","findspot":{"label":"Western Čatež–Krška vas highway-cutting search area; exact ancient seating unresolved","coordinates":[15.59518944,45.89303912],"coordinate_source":"gustin-olic-cateski-survey-anchor","accuracy_m":600,"accuracy_note":"Representative search-area anchor transformed from a published survey coordinate, not the milestone's excavated position."},"repository":{"label":"Posavski muzej Brežice in Brežice Castle; institution proxy","coordinates":[15.5925453,45.9018202],"current_status":"Historical and2012 photographic custody report; present fragment presence not newly verified"},"limits":["The lost distance origin ab A[...] has competing proposed restorations; it does not securely establish Andautonia or an administrative boundary.","Original CIL numbers cited by Petru are comparanda, not this newly discovered object; none is assigned to this milestone.","Discovery-year conflict remains:1958 in Lovenjak1997,1959 in later catalogues and the2018 monograph.","EDCS-10001181's point at another Čatež remains quarantined.","The mapped original-setting point is a published contextual survey anchor with a600m editorial search envelope, not the recovered seating; it is excluded from road-distance comparison.","The museum point is an institutional destination associated with published custody, not confirmation of current fragment presence or display.","A2024 newspaper report identifies a Roman-milestone replica in the renewed village square. Its exact identity and position remain unadmitted; the public monument is not substituted for the original milestone or museum custody."],"location_audit_notes":["EDCS-10001181 coordinate[14.9588038,45.9705365] conflicts with the explicit Brežice-area discovery and remains excluded.","Original-setting geometry is now an explicitly bounded contextual search area based on a published site-survey anchor and road-cut descriptions; exact seating is unresolved.","Museum directions destination is separated from its map viewport centre and from object-level custody certainty."]},"spatial_evidence_updates":{"limitations":["T2a classifies the published ancient seating, not the precision of the mapped search-area centre.","The600m original-setting search envelope is unsuitable for point-to-road alignment tests.","The museum destination remains a T6 institution proxy and cannot inherit the ancient-setting tier.","Discovery year and lost distance origin remain disputed; inscription chronology139–141CE is unchanged."],"pending_requirements":["Locate the actual1950s station from archival excavation documentation or a survey tied to surviving control features before reducing the search envelope or enabling alignment comparison.","Audit source genealogy before calling the relation independent confirmation of an Itiner-e segment."],"location_effective_tier_overrides":{"catez-iljug1176-original-station":{"tier":"T5","rationale":"The original seating is documented at object level as T2a, but the mapped coordinate is a published contextual survey anchor for a 600 m original-setting search area; it does not pinpoint the seating.","comparison_eligible":false}}},"methods":["Published grid transformation and explicit contextual search envelope; not a town-centroid replacement and not a fit to Itiner-e geometry.","The600m radius is an editorial geographic bound. Geodetic transform accuracy must not be substituted for archaeological location precision.","Original-setting evidence, later institution and modern replica report remain separate assertions."],"remaining_limits":["No published georeferenceable plan of the milestone seating itself was found in the inspected sources.","The Čateški Grič survey anchor and heritage polygon describe a contextual archaeological site, not the milestone discovery footprint.","No original-socket point, dated museum room position or replica coordinate is claimed."]},{"schema_version":"1.0-site-position-audit","created":"2026-10-17","case_id":"taucheira-fs12-primary-socket","new_sources":[{"id":"hgl913-taucheira-control","title":"Heritage Gazetteer of Libya, Taucheira, locus 913","url":"https://slsgazetteer.org/913/","locator":"Coordinates: first entry latitude 32.54, longitude 20.568, provenance Google Earth; second entry 32.53531, 20.5665, provenance Geonames.","consultation":"Full publicly accessible HTML read and coordinate/provenance fields checked. World Historical Gazetteer index also identifies source record 913; its two coordinate entries are separate locators, not polygon bounds.","consulted":true,"consulted_on":"2026-10-17","source_role":"Geographic city-control locator only; no milestone coordinate or road evidence."},{"id":"unesco6487-ptolemais-control","title":"Permanent Delegation of Libya to UNESCO, The Archaeological Site of Ptolemais, Tentative List 6487, submitted 20 July 2020","url":"https://whc.unesco.org/en/tentativelists/6487","locator":"Coordinates N 32 42 28.39 E 20 57 6.23; state-party nomination location","consultation":"Coordinate field read directly on UNESCO page. Nomination location does not identify the exact published map-symbol centre.","consulted":true,"consulted_on":"2026-10-17","source_role":"Geographic city-control locator only; no milestone coordinate."},{"id":"emrage-nikolaus2023-fs12-context","title":"Ahmad Emrage and Julia Nikolaus, Coastal and maritime archaeology in Cyrenaica, Libya: history, developments, site identification and challenges, Libyan Studies 54 (2023), 160–178","url":"https://doi.org/10.1017/lis.2023.12","locator":"Section From Tocra to Al-Ogla, paragraph beginning In antiquity; figs.11 and 13.","consultation":"Full publisher HTML and published figs.11 and 13 inspected. Both regional maps omit a separately legible PT-019 label; no numerical FS 12 coordinate obtained. The text cites the 2009 report and is not treated as independent re-observation of the stone.","consulted":true,"consulted_on":"2026-10-17","source_role":"Later published contextual cross-reference, not a new GPS station."}],"location_updates":[{"id":"taucheira-fs12-original-socket","label":"FS 12 original station vicinity — publication-derived area, exact socket unlocated","coordinates":[20.626,32.567],"coordinate_source":"weber-berger2016-fs12","source_ids":["weber-berger2016-fs12","hgl913-taucheira-control","unesco6487-ptolemais-control","emrage-nikolaus2023-fs12-context"],"accuracy_m":1000,"precision_note":"Approximate station vicinity from the 2016 regional survey map. The 1,000 m radius is an editorial search envelope, not a surveyed socket or statistical confidence interval. Original socket and adjacent fallen shaft were documented in 2009; proposed museum transfer is unverified.","coordinate_fitness":"Regional area locator for the original station. Excluded from point-to-road alignment comparisons; contextual T2a status does not imply precise station geometry.","geometry_method":{"kind":"two-control-similarity-area-locator","summary":"The FS 12 symbol in Weber-Karyotakis and Berger 2016 fig.1 was located using a two-city constrained similarity transform, checked against the figure scale and north arrow. The 1 km circle is an editorial search envelope, not GPS accuracy.","source_ids":["weber-berger2016-fs12","hgl913-taucheira-control","unesco6487-ptolemais-control"],"source_figure":{"locator":"Printed p.24 fig.1;  (one-based)","extraction_command":"pdfimages -f 7 -l 7 -png weber2016-ptolemais [workstation path omitted]","extracted_image_dimensions_px":[910,516],"pixel_origin":"top-left; x rightwards, y downwards","redistribution":"Modern publication figure not bundled; source link and derived numerical control data only.","locator_status":"Published page locator supplied in the recorded citation; verification and reuse limits remain separate."},"coordinate_reference_system":{"working":"WGS84 / UTM zone 34N, EPSG:32634","output":"Longitude/latitude, EPSG:4326","input_datum_limit":"The cited web records do not expressly state a datum. Their geographic coordinates are treated as WGS84 web-gazetteer coordinates for this coarse map fit; no survey-grade datum claim is made."},"controls":[{"label":"Taucheira city symbol","pixel_xy":[29.4,481.8],"coordinates":[20.568,32.54],"source_id":"hgl913-taucheira-control","locator":"Coordinates: first entry, provenance Google Earth; not the second Geonames entry","control_limit":"Town/site locator, not a surveyed point matching the exact publication symbol."},{"label":"Ptolemais city symbol","pixel_xy":[831.6,56.7],"coordinates":[20.951730555555553,32.707886111111115],"source_id":"unesco6487-ptolemais-control","locator":"Coordinates N 32 42 28.39 E 20 57 6.23","control_limit":"Archaeological-site nomination locator, not a surveyed point matching the exact publication symbol."}],"target":{"label":"FS 12 milestone symbol","pixel_xy":[150.8,413.5],"pixel_reading_tolerance_px":2,"unrounded_derived_coordinate":[20.625995789379154,32.56707952002998],"admitted_map_centre":[20.626,32.567]},"fit":{"model":"For pixel p=x-i*y and UTM z=E+i*N: z=a*p+b. Two controls determine a and b; no affine shear or polynomial warping.","a_real":44.63312066954313,"a_imag":-0.5534967650213041,"b_real":458390.5493731997,"b_imag":3621895.9435790894,"metres_per_pixel":44.63655250319952,"rotation_degrees_from_image_up_to_UTM_north":-0.7104903850574713,"fitted_control_residuals_m":[0,0],"residual_limit":"Two control pairs exactly determine this transform, so zero residuals are tautological and do not validate absolute positional accuracy. No independent holdout geographic control is claimed."},"checks":{"published_0_to_10km_bar_pixel_x":[425.0,648.7],"scale_bar_metres_per_pixel":44.702726866338836,"fit_predicts_10km_bar_m":9985.196794965734,"scale_difference_percent":-0.1480320503426502,"north_arrow":"Published arrow points image-up. Fitted rotation is about -0.71 degrees relative to UTM north; broadly consistent at this figure scale.","checks_limit":"Scale and north are internal checks from the same publication, not independent geospatial validation. The narrative some 5 km east describes a road stretch, not a numerical FS12 station coordinate."},"sensitivity":{"alternative_same_city_control":{"coordinates":[20.5665,32.53531],"source_id":"hgl913-taucheira-control","locator":"Coordinates: second entry, provenance Geonames"},"alternative_derived_coordinate":[20.624701536419916,32.563114372106895],"target_shift_m":456.21036684059345,"interpretation":"Changing the Taucheira locator moves the result about 456m. This is a same-site sensitivity check, not a third distinct control."},"uncertainty":{"display_radius_m":1000,"type":"editorial search area; not a statistical confidence interval or guaranteed error bound","basis":"Approximate city-symbol correspondence, 456 m alternative-anchor shift, regional map generalisation, source datum unspecified, and about 90 m target-symbol reading tolerance. Coordinate rounded to 0.001 degree; rounding does not imply 100 m accuracy.","comparison_use":"Exclude from automatic point-to-road comparisons. The area supports locating the original station vicinity, not selecting a particular Itiner-e segment."},"not_used":["Itiner-e geometry","road-nearest snapping","bulk catalogue milestone coordinates","modern museum position"],"reproduction_python":"from pyproj import Transformer\nf=Transformer.from_crs('EPSG:4326','EPSG:32634',always_xy=True)\ng=Transformer.from_crs('EPSG:32634','EPSG:4326',always_xy=True)\np0,p1,p=complex(29.4,-481.8),complex(831.6,-56.7),complex(150.8,-413.5)\nz0=complex(*f.transform(20.568,32.54))\nz1=complex(*f.transform(20+57/60+6.23/3600,32+42/60+28.39/3600))\na=(z1-z0)/(p1-p0)\nb=z0-a*p0\nz=a*p+b\nprint(g.transform(z.real,z.imag))"},"comparison_eligible":false,"status":"Original socket documented in situ in 2009; map centre is an approximate area locator. Fallen shaft adjacent then; current custody unverified.","coordinate_precision_decimals":3,"uncertainty_type":"editorial-search-area","position_evidence_tier":"T5"}],"new_locations":[],"case_updates":{"position_audit_file":"site-position-fs12.json","findspot":{"label":"FS 12, coastal via maritima east of Taucheira/Tocra, Cyrenaica","coordinates":[20.626,32.567],"coordinate_source":"weber-berger2016-fs12","accuracy_m":1000,"accuracy_note":"Approximate station vicinity from the 2016 regional survey map. The 1,000 m radius is an editorial search envelope, not a surveyed socket or statistical confidence interval. Original socket and adjacent fallen shaft were documented in 2009; proposed museum transfer is unverified."},"limits":["The article abstract mentions two inscribed milestones with sockets; the detailed FS 12 passage describes one socket-and-shaft relation. This case represents that expressly described relation and does not invent a second object identity.","No CIL concordance is assigned: the report says the 2009 discoveries were previously unpublished.","A proposed museum transfer is not evidence of an accomplished relocation.","The mapped coordinate is a 1 km editorial search area derived from a regional publication figure, not a measured socket position; present custody remains unverified."],"spatial_evidence":{"tier":"T2","subtype":"T2a","assessment_date":"2026-10-17","rationale":"The field report expressly identifies the original socket, adjacent fallen inscribed shaft and physical Roman road; this is a documented primary station.","source_ids":["weber-berger2016-fs12"],"anchor_location_ids":["taucheira-fs12-original-socket"],"gates":{"primary_setting_documented":true,"physical_roman_road_relation":true,"milestone_function_supported":true,"historical_position_distinguished_from_current":true},"gate_sources":{"primary_setting_documented":["weber-berger2016-fs12"],"physical_roman_road_relation":["weber-berger2016-fs12"],"milestone_function_supported":["weber-berger2016-fs12"],"historical_position_distinguished_from_current":["weber-berger2016-fs12"]},"limitations":["The article abstract mentions two inscribed milestones with sockets; the detailed FS12 passage describes one socket-and-shaft relation. This case represents that expressly described relation and does not invent a second object identity.","No CIL concordance is assigned: the report says the 2009 discoveries were previously unpublished.","A proposed museum transfer is not evidence of an accomplished relocation.","The mapped coordinate is a 1 km editorial search area derived from a regional publication figure, not a measured socket position; present custody remains unverified."],"pending_requirements":["Obtain or publish the original 2009 GPS station record or georeference a site-specific surveyed plan before admitting a precise original socket coordinate.","Audit source genealogy before calling the relation independent confirmation of an Itiner-e segment."],"object_identity":"FS12 socket and specifically described adjacent inscribed shaft, one reviewed object relation","milestone_function_status":"Accepted in the inspected publication.","roman_attribution_status":"Roman attribution in the inspected field publication.","support_form":"Freestanding milestone column, preserved in fragments.","support_original_position_status":"Original socket in situ during 2009 survey; current shaft custody unverified","historical_location_role":"original_station","road_context_status":"original_installation","publication_locator":"p.25 section1.1 and note4; p.24 fig1 and p.26 fig3","publication_url_or_local_path":"https://www.gju.edu.jo/sites/default/files/School%20of%20Architecture%20and%20Built%20Environment/Department%20of%20Architecture%20and%20Interior%20Architecture/facultypublications/art_00362_weber_berger_libya_antiqua_2016.pdf","assessment_reason":"The field report expressly identifies the original socket, adjacent fallen inscribed shaft and physical Roman road; this is a documented primary station.","source_independence":"Not reviewed for any individual Itiner-e segment.","temporal_compatibility":"Inscription dating is not equated with the date of surviving road fabric.","inference_scope":"Primary marker station and documented local road relation only."}},"methods":[{"kind":"two-control-similarity-area-locator","summary":"The FS 12 symbol in Weber-Karyotakis and Berger 2016 fig.1 was located using a two-city constrained similarity transform, checked against the figure scale and north arrow. The 1 km circle is an editorial search envelope, not GPS accuracy.","source_ids":["weber-berger2016-fs12","hgl913-taucheira-control","unesco6487-ptolemais-control"],"source_figure":{"locator":"Printed p.24 fig.1;  (one-based)","extraction_command":"pdfimages -f 7 -l 7 -png weber2016-ptolemais [workstation path omitted]","extracted_image_dimensions_px":[910,516],"pixel_origin":"top-left; x rightwards, y downwards","redistribution":"Modern publication figure not bundled; source link and derived numerical control data only.","locator_status":"Published page locator supplied in the recorded citation; verification and reuse limits remain separate."},"coordinate_reference_system":{"working":"WGS84 / UTM zone 34N, EPSG:32634","output":"Longitude/latitude, EPSG:4326","input_datum_limit":"The cited web records do not expressly state a datum. Their geographic coordinates are treated as WGS84 web-gazetteer coordinates for this coarse map fit; no survey-grade datum claim is made."},"controls":[{"label":"Taucheira city symbol","pixel_xy":[29.4,481.8],"coordinates":[20.568,32.54],"source_id":"hgl913-taucheira-control","locator":"Coordinates: first entry, provenance Google Earth; not the second Geonames entry","control_limit":"Town/site locator, not a surveyed point matching the exact publication symbol."},{"label":"Ptolemais city symbol","pixel_xy":[831.6,56.7],"coordinates":[20.951730555555553,32.707886111111115],"source_id":"unesco6487-ptolemais-control","locator":"Coordinates N 32 42 28.39 E 20 57 6.23","control_limit":"Archaeological-site nomination locator, not a surveyed point matching the exact publication symbol."}],"target":{"label":"FS 12 milestone symbol","pixel_xy":[150.8,413.5],"pixel_reading_tolerance_px":2,"unrounded_derived_coordinate":[20.625995789379154,32.56707952002998],"admitted_map_centre":[20.626,32.567]},"fit":{"model":"For pixel p=x-i*y and UTM z=E+i*N: z=a*p+b. Two controls determine a and b; no affine shear or polynomial warping.","a_real":44.63312066954313,"a_imag":-0.5534967650213041,"b_real":458390.5493731997,"b_imag":3621895.9435790894,"metres_per_pixel":44.63655250319952,"rotation_degrees_from_image_up_to_UTM_north":-0.7104903850574713,"fitted_control_residuals_m":[0,0],"residual_limit":"Two control pairs exactly determine this transform, so zero residuals are tautological and do not validate absolute positional accuracy. No independent holdout geographic control is claimed."},"checks":{"published_0_to_10km_bar_pixel_x":[425.0,648.7],"scale_bar_metres_per_pixel":44.702726866338836,"fit_predicts_10km_bar_m":9985.196794965734,"scale_difference_percent":-0.1480320503426502,"north_arrow":"Published arrow points image-up. Fitted rotation is about -0.71 degrees relative to UTM north; broadly consistent at this figure scale.","checks_limit":"Scale and north are internal checks from the same publication, not independent geospatial validation. The narrative some 5 km east describes a road stretch, not a numerical FS12 station coordinate."},"sensitivity":{"alternative_same_city_control":{"coordinates":[20.5665,32.53531],"source_id":"hgl913-taucheira-control","locator":"Coordinates: second entry, provenance Geonames"},"alternative_derived_coordinate":[20.624701536419916,32.563114372106895],"target_shift_m":456.21036684059345,"interpretation":"Changing the Taucheira locator moves the result about 456m. This is a same-site sensitivity check, not a third distinct control."},"uncertainty":{"display_radius_m":1000,"type":"editorial search area; not a statistical confidence interval or guaranteed error bound","basis":"Approximate city-symbol correspondence, 456 m alternative-anchor shift, regional map generalisation, source datum unspecified, and about 90 m target-symbol reading tolerance. Coordinate rounded to 0.001 degree; rounding does not imply 100 m accuracy.","comparison_use":"Exclude from automatic point-to-road comparisons. The area supports locating the original station vicinity, not selecting a particular Itiner-e segment."},"not_used":["Itiner-e geometry","road-nearest snapping","bulk catalogue milestone coordinates","modern museum position"],"reproduction_python":"from pyproj import Transformer\nf=Transformer.from_crs('EPSG:4326','EPSG:32634',always_xy=True)\ng=Transformer.from_crs('EPSG:32634','EPSG:4326',always_xy=True)\np0,p1,p=complex(29.4,-481.8),complex(831.6,-56.7),complex(150.8,-413.5)\nz0=complex(*f.transform(20.568,32.54))\nz1=complex(*f.transform(20+57/60+6.23/3600,32+42/60+28.39/3600))\na=(z1-z0)/(p1-p0)\nb=z0-a*p0\nz=a*p+b\nprint(g.transform(z.real,z.imag))"}],"remaining_limits":["Two distinct geographic control sites only; no independent holdout location.","No original 2009 GPS list or numerical FS12 coordinate was found in the inspected 2016 article or 2023 coastal-survey publication.","The 2023 survey points readers to the milestone and road context PT-019 about 200m east; the inspected published maps do not yield a separately labelled PT-019 coordinate.","Shaft transfer was recommended in 2009; no completed museum transfer or present custody was established.","Inscription remains unread and undated; the earlier Tetrarchic museum stone is a different object."],"spatial_evidence_updates":{"location_effective_tier_overrides":{"taucheira-fs12-original-socket":{"tier":"T5","rationale":"The original socket beside a physical Roman road is publication-supported (object T2a); this derived regional-map centre locates only its approximate station vicinity within a 1 km editorial envelope. It is a T5 area locator, not a surveyed socket position.","comparison_eligible":false}}}},{"case_id":"rib-2308-smiths-shield","assessment_date":"2026-10-17","new_sources":[{"id":"smith-her-N6577","title":"Northumberland Historic Environment Record / Keys to the Past N6577: Roman milestone 1.5 km west of Vindolanda (Smith’s Shield)","url":"https://keystothepast.info/search-records/results-of-search/results-of-search-2/site-details/?PRN=N6577","locator":"Monument narrative: initial OS-map NGR; primary base, rebuilt gateway and removed/lost shaft posts; Sedgley NGR; OS 1966 and RCHME1988 events","consultation":"Complete current official monument entry directly inspected. The record transcribes earlier authorities; original field notebooks and original OS 1957 sheet not inspected. Publication/survey dates distinguished from the 2026 access date.","consulted":true,"consulted_on":"2026-10-17"},{"id":"smith-her-sources","title":"Keys to the Past N6577: sources of reference","url":"https://keystothepast.info/Source-of-reference?PRN=N6577","locator":"Items 1–7: OS 6-inch 1957; RIB 1965 pp. 724–725; OS field investigation, R. W. Emsley, 13 October 1966; Sedgley 1975, p. 45 no. 90; NHLE 1997; RCHME, Mark Bowden, 16 February 1988 and EH 2010 map","consultation":"Complete source list directly inspected. These cited fieldwork/survey items are source-lineage evidence, not a claim to have opened the original reports.","consulted":true,"consulted_on":"2026-10-17"},{"id":"smith-her-point","title":"Durham County Council public Keys to the Past GIS: N6577 object-level British National Grid point","url":"https://spatial.durham.gov.uk/arcgis/rest/services/External/VectorPoint/MapServer/12/query?where=PRN%3D%27N6577%27&outFields=PRN%2CNAME%2CEASTING%2CNORTHING&f=pjson","locator":"External/VectorPoint/MapServer/12, PRN=N6577: EASTING 375644, NORTHING 566223; layer extent SR EPSG27700. Linked by the Keys to the Past map app/webmap.","consultation":"Layer schema and filtered PRN feature directly queried; the official monument page links its map through ArcGIS app f8d92df13cd74c7884302046d47f923b, webmap b7d0cbe3a7ed48029711f466783da4e8. This is an object record locator with no published field accuracy. WGS84 conversion is editorial and reproducible.","consulted":true,"consulted_on":"2026-10-17"},{"id":"smith-codley-exclusion","title":"Keys to the Past N6576: the separate eastern Codley Gate milestone","url":"https://keystothepast.info/search-records/results-of-search/results-of-search-2/site-details/?PRN=N6576","locator":"OS 1966 resurvey NY 7718 6648; narrative cites NY 772 664 and explicitly says one Roman mile east of Smith’s Shield milestone [NY 76 NE 27].","consultation":"Complete official entry inspected solely to exclude the eastern milestone NGR from RIB2308; no identification or positional certainty of that separate object transferred.","consulted":true,"consulted_on":"2026-10-17"}],"location_updates":[{"id":"rib-2308-original-base","coordinates":[-2.3821771,54.9899943],"coordinate_source":"https://spatial.durham.gov.uk/arcgis/rest/services/External/VectorPoint/MapServer/12/query?where=PRN%3D%27N6577%27&outFields=PRN%2CNAME%2CEASTING%2CNORTHING&f=pjson","precision_note":"Object-level official HER point E375644 N566223 (OSGB36/British National Grid), converted to WGS84 with pyproj/PROJ EPSG:1314. Display with a 60 m editorial envelope: the HER also transcribes NY 7564 6624 (OS 1957) and NY 7567 6625 (Sedgley 1975), whose source positions differ. The envelope is not a field-survey accuracy or statistical confidence interval. The base’s primary setting is publication-supported; its exact station is not resolved to metre precision.","accuracy_m":60,"source_ids":["rib2308-corpus","he1014820-stanegate","smith-her-N6577","smith-her-sources","smith-her-point"],"geometry_method":{"id":"smith-her-grid-conversion-20261017","kind":"published-grid-conversion","summary":"Official object-level HER GIS point, cross-checked against the record’s historical OS/Sedgley NGRs, converted from British National Grid to WGS84; no map digitization or site centroid used.","source_ids":["smith-her-N6577","smith-her-point"],"source_crs":"EPSG:27700 — OSGB36 / British National Grid","target_crs":"EPSG:4326 — WGS84; stored longitude,latitude","input":{"easting_m":375644,"northing_m":566223,"prn":"N6577"},"input_historical_references":[{"label":"OS 6-inch 1957, as transcribed by HER","ngr":"NY 7564 6624","easting_m":375640,"northing_m":566240,"grid_resolution_m":10},{"label":"Sedgley 1975, p.45 no.90, as transcribed by HER; book not directly inspected","ngr":"NY 7567 6625","easting_m":375670,"northing_m":566250,"grid_resolution_m":10}],"software":"pyproj 3.8.0; PROJ 9.8.1","operation":"Inverse of British National Grid + OSGB36 to WGS84 (6), EPSG:1314, axis order normalized","operation_accuracy_m":2,"operation_accuracy_scope":"PROJ/EPSG operation metadata only; not milestone-location accuracy or a statistical confidence interval","pipeline":"proj=pipeline step inv proj=tmerc lat_0=49 lon_0=-2 k=0.9996012717 x_0=400000 y_0=-100000 ellps=airy step proj=push v_3 step proj=cart ellps=airy step proj=helmert x=446.448 y=-125.157 z=542.06 rx=0.15 ry=0.247 rz=0.842 s=-20.489 convention=position_vector step inv proj=cart ellps=WGS84 step proj=pop v_3 step proj=unitconvert xy_in=rad xy_out=deg","grid_limitation":"OSTN15 correction grid was unavailable in the temporary runtime; explicit EPSG:1314 Helmert operation selected, avoiding ballpark/no-datum conversion. Its 2 m stated transformation accuracy is small relative to the 60 m editorial location envelope.","output_unrounded":[-2.3821770920174834,54.9899942733212],"official_wgs84_crosscheck":{"coordinates":[-2.382185165526039,54.99000005215788],"source":"Same official GIS query with outSR=4326","difference_m_approx":0.83,"scope":"Cross-check of transformation only; official server datum operation not supplied"},"uncertainty":{"radius_m":60,"type":"editorial display envelope","confidence_level":null,"basis":"Current HER point differs by 17.5 m from the OS 1957 NGR corner and by 37.5 m from the Sedgley NGR corner. A 60 m circle includes both full 10 m grid cells plus 2 m operation accuracy and a small rounding margin. This is a defensible display bound on admitted source positions, not a guaranteed archaeological or 95% error bound."},"source_access":"HER narrative, source-of-reference page, public GIS layer schema, app/webmap links and PRN feature queried directly on 17 October 2026. Original OS map, field notebooks, and Sedgley book were not directly inspected.","reproduction_python":"from pyproj import Transformer\nt = Transformer.from_pipeline(PIPELINE_RECORDED_ABOVE)\nlongitude, latitude = t.transform(375644, 566223)","not_used":["NHLE 1014820 designation-wide centroid NY7634466400","NY 772 664 / Codley Gate eastern milestone","Vindolanda fort catalogue locality","Citizen field point NY7561766242 (discovery lead only; excluded from coordinate authority)"]},"coordinate_fitness":"Object-specific published heritage locator with editorial source-disagreement envelope; navigation and contextual display only","comparison_eligible":false,"date_display":"Standing by 1725; base measured 1944; OS field observation 1966 and RCHME measured-survey entry 1988 reported by HER; coordinate accessed 2026","status":"Original base still in situ in RIB and later official HER accounts; mapped HER position has explicit positional uncertainty; no new current field inspection"},{"id":"rib-2308-shaft-gatepost","coordinates":null,"coordinate_source":null,"accuracy_m":null,"label":"Upper shaft formerly reused as north gatepost about 145 m west; later reported lost","precision_note":"RIB records a gatepost 145 m west of the original base. The later HER states that the gateway was rebuilt and the north post lost. No documented gate coordinate was recovered; a due-west point would add unsupported bearing and gateway assumptions, so this transported fragment remains unmapped.","source_ids":["rib2308-corpus","smith-her-N6577","smith-her-sources"],"date_display":"Reuse after c. 1815; recorded by RIB 1944; later HER/Sedgley account reports north post lost","status":"Historical transported gatepost, later reported lost; no present custody point admitted","comparison_eligible":false,"coordinate_fitness":"Unlocated historical secondary reuse; relative report retained as text"},{"id":"rib-2308-shaft-disused","coordinates":null,"coordinate_source":null,"accuracy_m":null,"label":"Other shaft piece reported disused near rebuilt western gateway (1944/1968)","precision_note":"RIB reports it lying near the western gate in 1944; the HER, citing Sedgley 1975, p. 45 no. 90, reports it disused there in 1968. The gateway and loose-fragment spot were not independently surveyed in the accessed material; location and current survival remain unresolved.","source_ids":["rib2308-corpus","smith-her-N6577","smith-her-sources"],"date_display":"Historical observations 1944 and 1968 (the latter reported by HER citing Sedgley 1975)","status":"Displaced shaft fragment in historical observation; present position not confirmed","comparison_eligible":false,"coordinate_fitness":"Unlocated historical observation; no precise original or current location inferred"}],"new_locations":[],"case_updates":{"limits":["Primary roadside admission attaches to the surviving base, not to displaced upper fragments.","Original position is established in inspected publication narratives; no stratigraphic socket excavation has been inspected.","The local Stanegate relation does not date the road fabric or validate an entire Itiner-e segment.","A recorded sixteenth-mile station is an attribution from milestone spacing and Corbridge distance, not a surviving numeral on the base.","Original CIL VII 1187 was not directly collated. CIL correspondence is reported by RIB.","Birley 2017 full text was not inspected; abstract-based statements are explicitly limited.","Original-base location is mapped from the official object-level HER point with a 60 m editorial uncertainty envelope. Historical NGRs and the current GIS point differ; this is not a field GPS or socket survey coordinate. Displaced shaft pieces remain unlocated."],"findspot":{"label":"Smith’s Shield surviving original base, north side of the Stanegate","coordinates":[-2.3821771,54.9899943],"coordinate_source":"https://spatial.durham.gov.uk/arcgis/rest/services/External/VectorPoint/MapServer/12/query?where=PRN%3D%27N6577%27&outFields=PRN%2CNAME%2CEASTING%2CNORTHING&f=pjson","accuracy_m":60,"accuracy_note":"Object-level official HER point E375644 N566223 (OSGB36/British National Grid), converted to WGS84 with pyproj/PROJ EPSG:1314. Display with a 60 m editorial envelope: the HER also transcribes NY 7564 6624 (OS 1957) and NY 7567 6625 (Sedgley 1975), whose source positions differ. The envelope is not a field-survey accuracy or statistical confidence interval. The base’s primary setting is publication-supported; its exact station is not resolved to metre precision."}},"methods":[{"id":"smith-her-grid-conversion-20261017","kind":"published-grid-conversion","summary":"Official object-level HER GIS point, cross-checked against the record’s historical OS/Sedgley NGRs, converted from British National Grid to WGS84; no map digitization or site centroid used.","source_ids":["smith-her-N6577","smith-her-point"],"source_crs":"EPSG:27700 — OSGB36 / British National Grid","target_crs":"EPSG:4326 — WGS84; stored longitude,latitude","input":{"easting_m":375644,"northing_m":566223,"prn":"N6577"},"input_historical_references":[{"label":"OS 6-inch 1957, as transcribed by HER","ngr":"NY 7564 6624","easting_m":375640,"northing_m":566240,"grid_resolution_m":10},{"label":"Sedgley 1975, p.45 no.90, as transcribed by HER; book not directly inspected","ngr":"NY 7567 6625","easting_m":375670,"northing_m":566250,"grid_resolution_m":10}],"software":"pyproj 3.8.0; PROJ 9.8.1","operation":"Inverse of British National Grid + OSGB36 to WGS84 (6), EPSG:1314, axis order normalized","operation_accuracy_m":2,"operation_accuracy_scope":"PROJ/EPSG operation metadata only; not milestone-location accuracy or a statistical confidence interval","pipeline":"proj=pipeline step inv proj=tmerc lat_0=49 lon_0=-2 k=0.9996012717 x_0=400000 y_0=-100000 ellps=airy step proj=push v_3 step proj=cart ellps=airy step proj=helmert x=446.448 y=-125.157 z=542.06 rx=0.15 ry=0.247 rz=0.842 s=-20.489 convention=position_vector step inv proj=cart ellps=WGS84 step proj=pop v_3 step proj=unitconvert xy_in=rad xy_out=deg","grid_limitation":"OSTN15 correction grid was unavailable in the temporary runtime; explicit EPSG:1314 Helmert operation selected, avoiding ballpark/no-datum conversion. Its 2 m stated transformation accuracy is small relative to the 60 m editorial location envelope.","output_unrounded":[-2.3821770920174834,54.9899942733212],"official_wgs84_crosscheck":{"coordinates":[-2.382185165526039,54.99000005215788],"source":"Same official GIS query with outSR=4326","difference_m_approx":0.83,"scope":"Cross-check of transformation only; official server datum operation not supplied"},"uncertainty":{"radius_m":60,"type":"editorial display envelope","confidence_level":null,"basis":"Current HER point differs by 17.5 m from the OS 1957 NGR corner and by 37.5 m from the Sedgley NGR corner. A 60 m circle includes both full 10 m grid cells plus 2 m operation accuracy and a small rounding margin. This is a defensible display bound on admitted source positions, not a guaranteed archaeological or 95% error bound."},"source_access":"HER narrative, source-of-reference page, public GIS layer schema, app/webmap links and PRN feature queried directly on 17 October 2026. Original OS map, field notebooks, and Sedgley book were not directly inspected.","reproduction_python":"from pyproj import Transformer\nt = Transformer.from_pipeline(PIPELINE_RECORDED_ABOVE)\nlongitude, latitude = t.transform(375644, 566223)","not_used":["NHLE 1014820 designation-wide centroid NY7634466400","NY 772 664 / Codley Gate eastern milestone","Vindolanda fort catalogue locality","Citizen field point NY7561766242 (discovery lead only; excluded from coordinate authority)"]}],"remaining_limits":["No original OS 1957 map sheet, 1966 field notebook, 1988 RCHME plan or Sedgley 1975 book directly inspected in this pass; provenance and coordinate references are transcribed by the official current HER.","The current county GIS supplies metre-resolution coordinates without documented object-survey accuracy. Sixty metres is an editorial envelope covering the admitted historical grid cells, not a certified error bound.","No separate later shaft coordinates admitted. RIB 1944 custody wording must not be shown as a verified current location after the HER report that the gateway was rebuilt and north post lost.","The base provides a local roadside relationship only. Its map point stays ineligible for numerical road alignment tests; no chronological or independent corroboration of an entire Itiner-e segment follows."],"source_capture_receipts":[{"sha256":"8b5492d91b982146920b57afe642d4e6fda2d5d87c2975581a22b606f7a00e20","scope":"Transient direct-fetch evidence; retained outside the atlas, not a claim that the cited older report was directly read"},{"sha256":"2b0348db5d44056d0db32fd20845a7afd98c9c8ec85001702f57006b6ac824cf","scope":"Transient direct-fetch evidence; retained outside the atlas, not a claim that the cited older report was directly read"},{"sha256":"bcc793717b880d374c10e7104779bb65518cba284fd824e73d8def4aa11bc925","scope":"Transient direct-fetch evidence; retained outside the atlas, not a claim that the cited older report was directly read"},{"sha256":"f61deaf39a31488bf698ca2af8ad19e805c714755d1bf3a3fae571bdff6e3d09","scope":"Transient direct-fetch evidence; retained outside the atlas, not a claim that the cited older report was directly read"},{"sha256":"99305c0f60abf64f2ffef3de170032fcc5703f8ad79f072f4dad964b942934b5","scope":"Transient direct-fetch evidence; retained outside the atlas, not a claim that the cited older report was directly read"},{"sha256":"c85573f6b65efc40b8b20f6440ba9906fb9db3571ed8f5dc42d9c2573a0a3fb6","scope":"Transient direct-fetch evidence; retained outside the atlas, not a claim that the cited older report was directly read"},{"sha256":"40ce1b4b3f170f65963651b75633e11d963298dc5cf39e6938687b96bcbc56da","scope":"Transient direct-fetch evidence; retained outside the atlas, not a claim that the cited older report was directly read"}],"spatial_evidence_updates":{"limitations":["Publication-established primary base; no stratigraphic socket report inspected.","Original base mapped by object-level HER point with a 60 m editorial source-disagreement envelope, not exact field GPS.","Chronology of primary phase remains uncertain; secondary formula broadly fourth century.","Transported shaft pieces have historical relative reports but remain unmapped; north gatepost later reported lost."],"pending_requirements":["Inspect original CIL VII 1187 and full Birley 2017 article.","Recover or inspect the original OS 1966 / RCHME 1988 measured-survey documentation to reconcile the HER map point with the two published historical grid references; confirm current survival of the base on site.","Review Itiner-e segment source genealogy and local road phase before claiming independent alignment or chronology confirmation."]}}]}