Query San Jose, CA's Heritage Tree register (protected trees of historic, size, or species significance) via the city's ArcGIS GeoService REST endpoint
domain: data.sanjoseca.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Use the confirmed ArcGIS GeoServices REST endpoint https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/511 for the Heritage Tree layer
Query the layer with standard ArcGIS REST query parameters (where, outFields, f=json/geojson) to filter or export records
Alternatively use the pre-built download API: https://gisdata-csj.opendata.arcgis.com/api/download/v1/items/382c588177f5482dbe326360e92b9507/{format}?layers=511 for csv, shapefile, geojson, or kml
Note that the underlying data is republished weekly (Mondays) per the dataset's stated refresh cadence
Cross-reference the ArcGIS Hub dataset page (gisdata-csj.opendata.arcgis.com/datasets/CSJ::heritage-tree) for the current field dictionary
Known gotchas
Layer ID 511 is specific to San Jose's shared OPN_OpenDataService MapServer, which hosts many unrelated layers on the same service — always confirm the /511 layer index hasn't been reassigned before relying on it long-term
Heritage designation criteria (history, girth, height, species, or unique quality) are San Jose-specific and not comparable field-for-field with Portland's or other cities' heritage-tree schemas
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