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  "retrieved": "2026-10-30",
  "upstreamCommit": "885732d332a20a59143f655c83fb15e1367ebe4d",
  "attribution": "Contains UBC Campus + Community Planning open geospatial data, PDDL 1.0. No UBC endorsement.",
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    "source": "EPSG:4326",
    "target": "EPSG:26910 local metres; x east, z south",
    "origin": [
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    "originUtm": [
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    "method": "Snyder transverse Mercator series, GRS80, UTM zone 10N; WGS84 treated as NAD83, no epoch/datum shift",
    "roundingMetres": 0.01
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    "surfaces": 6070,
    "trees": 9324,
    "routes": 6103,
    "entrances": 1450,
    "roads": 213
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    "Parking": 56,
    "Pedestrian": 596,
    "Road": 5,
    "Concrete": 83,
    "OSPlantingBed": 211,
    "Lawn": 1950,
    "PlantingBed": 2863,
    "Wild": 76,
    "Garden": 9,
    "Field": 21,
    "Farm": 41
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  "processing": {
    "polygons": "RDP 0.16 m buildings / 0.20 m landscape per ring, every hole retained. Features selected by source vertex inside bounds; full boundary features retained, not clipped.",
    "routes": "Source pedestrian-allowed or unknown-access lines, RDP 0.08 m; Bldg_Inside lines excluded to avoid routing through unsupported interiors. No invented connections.",
    "buildings": "Completed source buildings only; original multipart geometry split with stable suffixes; BLDG_HEIGHT field where available, floor-count estimate otherwise.",
    "trees": "GPS positions and recorded species; THEIGHT when present and plausible, illustrative size otherwise. Evergreen classes and known conifer taxa remain evergreen.",
    "privacy": "Only allowlisted visitor geometry/attributes retained. No staff/editor identities or email metadata.",
    "terrain": "Flat datum. No DTM, terrain heights, entrance floor elevations, or tree terrain offsets available in this snapshot.",
    "anchors": "Minimum-area footprint rectangles oriented toward a recorded primary entrance where available. Not exact architectural facade or interior outlines."
  },
  "limitations": [
    "Data observation dates and precision vary; retrieval date does not imply a current survey.",
    "Footprint heights are maxima, not verified roof structures. ArcGIS time-slider layer not incorporated.",
    "Stadium home plate/orientation inferred from official clay-circle and mound polygons, not independently survey-verified.",
    "Spawn source sidewalk near W16 verified in GIS; current physical access has not been field-surveyed.",
    "No live construction or occupancy data; future/proposed building status excluded.",
    "WGS84/NAD83 epoch shift not modeled; horizontal datum difference can be around metres."
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    "BLDG_HEIGHT": "Metres from grade to highest roof point, per UBC data dictionary",
    "MAX_FLOORS": "Total floors above and below grade; fallback height is illustrative and may overestimate"
  }
}