Urban Redevelopment Authority (URA) maintains Master Plan 2003 gross plot ratio (GPR) demarcation lines as open spatial data for Singapore. GEOJSON and KML files let planners see historical GPR line geometry that informed development control before later master plan cycles. Researchers comparing zoning intensity over time can load the layer beside contemporary GPR datasets. Frequency is listed as other in the catalog metadata.
Urban Redevelopment Authority GeoJSON of Gross Plot Ratio demarcation lines under Master Plan 2003. Architects, developers, and planning consultants map where GPR controls change across parcels and overlay them with zoning and conservation layers from the same plan era.