Riverdale Plaza public GIS snapshot — September 14, 2026
Read Riverdale-Sewer-Research.html for findings, source links, and limits.
sewer.geojson: 16 public sewer features, July 3, 2024 import.
direct-0.geojson: alternate service query, same 16 sewer IDs.
manholes.geojson: 12 sewer structure points from the county Sewer_Manhole layer, converted from Esri JSON.
address-points.geojson: approximate county address points.
buildings.geojson and parcels.geojson: county Health service context, not surveys.
All GeoJSON coordinates EPSG:4326. Exact query URLs retained.
Map background: M-NCPPC/PGAtlas March 2025 imagery. Export extent in aerial-export.json.
No private connection or 2026 route has been established.
Raw attribute codes and elevation units/datum remain unverified.
Source attribution and applicable reuse terms must be retained.
