These fields preserve the complete public record for checking and reuse. They are not needed for the main answer above.
- Record ID
- bnd-wasa-lahore-tubewell-distribution-2019
- Boundary Kind
- asset-catchment
- Administrative Purpose
- Show the recoverable groundwater-source locations on the dated official WASA tube-well distribution map
- Boundary Status
- reconstructed
- Observed Date
- 2019-01-16
- Geometry
- Status
- reconstructed
- Basis
- official-map-georeference
- Path
- source-data/geography/wasa-tubewell-distribution-candidates-2019.geojson
- Format
- GeoJSON
- Geometry Type
- Point
- Coordinate Reference System
- EPSG:4326
- Feature Count
- 79
- File Hash
- sha256:6e67ebab5dc238c86bf31e67b8d43cd13518fb8b42f8ce3f98126177331421a7
- Conversion Method
- PDF page 142 was rendered at 220 dpi. A repeatable colour and glyph-size filter recovered 79 visible tube-well symbols. Their centres were converted through the printed 74 degree 10, 20 and 30 minute longitude ticks and the 31 degree 30 minute latitude grid line. The extraction script and exact source PDF are preserved.
- Uncertainty Notes
- Treat each point as a 2019 map symbol with city-scale positional uncertainty. The figure reports a much larger agency total, so the recovered points are a visible subset or cartographic generalisation. The points are not asset IDs, survey coordinates or current operating records.
- Geographic Claim
- Assignment Level
- point
- Proves
- The official 2019 study represented a distributed groundwater tube-well system across Lahore, and 79 symbol positions can be recovered reproducibly from the published map.
- Does Not Prove
- It does not prove that every point still operates, show all current tube wells, name the well, identify its pressure zone, or assign a property to that source.
- Public Display
- primary
- Evidence Gap
- A current WASA tube-well asset register with IDs, survey coordinates, operating status, production, water-quality results and pressure-zone assignments.