Add WGS84 coordinates and simplified geometries to admin units - #13
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New `ltlod-geo` tool (etl/tools) reprojects the AR spatial models
(gra{apskritis,savivaldybe,seniunija,gyvenamojivietove}, LKS-94/EPSG:3346)
to WGS84 and emits, per admin unit, into a merged-on-load *-geo.trig:
- geo:lat/geo:long representative point (all four levels) — WGS84 Basic Geo,
what LinkedDataHub's map-marker path keys on.
- gs:asWKT simplified boundary (coarse levels: counties/municipalities/
elderships) — GeoSPARQL wktLiteral, bare WGS84 lon-lat, Douglas-Peucker
simplified (~50 m) since LDH does no client-side simplification and the raw
polygons are ~160 MB. Placed directly on #this so the map feature id is the
unit URI. Settlements stay point-only (20k detailed polygons too heavy).
Map wiring: :SubUnits (app/ns.ttl) and a new frontpage counties map
(app/root.ttl) use ac:MapMode. files/overrides.xsl drops the bulky WKT literal
from the property-list rendering (kept in the data so the map still draws it).
Also: optional geo:lat/long + gsp:asWKT in the admin-units SHACL shape;
ONTOLOGY-NOTES.md and CLAUDE.md document the vocabulary choice, the EPSG:3346
(Northing, Easting) axis-order gotcha, and the on-#this modeling.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The admin-unit *-geo.trig files are overlays (geo:lat/geo:long/gs:asWKT onto the entity docs' graphs, merged on load), like alignments.trig — they carry no per-graph dct:title/foaf:primaryTopic, so the strict validate.sh graph-invariant check rejects them. Route them through shacl.sh only, same as alignments/photos. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Admin units now carry WGS84 geographic data so LinkedDataHub renders them in map mode (
ac:MapMode).New
ltlod-geotool (etl/tools) reprojects the AR spatial (erdviniai duomenys) models from LKS-94/EPSG:3346 to WGS84 and emits, into a merged-on-load*-geo.trigper level:geo:lat/geo:longrepresentative point — all four levels (counties, municipalities, elderships, settlements). WGS84 Basic Geo; the map-marker path.gs:asWKTsimplified boundary — coarse levels only (counties/municipalities/elderships). GeoSPARQLwktLiteral, bare lon-lat, Douglas–Peucker simplified (~50 m).Why simplified / coarse-only
LDH does no client-side simplification and the raw source polygons total ~160 MB. Simplifying (~95–99 % fewer vertices, visually identical at map zoom) keeps the committed coarse geometry ~2.5 MB and the browser map fast. Settlements stay point-only (20,880 detailed polygons are too heavy);
settlements-geo.trigremains gitignored bulk.Map wiring
:SubUnits(app/ns.ttl) and a new frontpage counties map (app/root.ttl) useac:MapMode— no XSL change needed (map.xslships via the stockclient.xsl).files/overrides.xsldrops the bulky WKT literal from the property-list rendering; the map reads it straight from the RDF/XML DESCRIBE, so the polygon still draws.Modeling notes
gs:asWKTsits directly on#thisso the OpenLayers feature id is the unit URI (clickable → the unit's info-window).ol.format.WKT).Verification
riot --validate, base-independent round-trip, SHACL conforms with the new geo/geometry shape.make sefrecompiles the client SEF cleanly with the WKT suppression.Coverage (spatial registry ⊂ attribute registry): counties 10/10, municipalities 60/60, elderships 536/584, settlements 20,880/26,229.
Deploy
Not run here:
make load(loads the new*-geo.trig) +make install(pushes the MapMode views) + recreate thelinkeddatahubcontainer (reload the rebuilt SEF).🤖 Generated with Claude Code