{"schemaVersion":"1.0","title":"Published catchments intersecting selected SA2 display polygons","builtAtUtc":"2026-09-15T04:14:40.883976+00:00","layers":[{"id":"mwSewerBasins","title":"Sewerage Network Basins","category":"sewer catchments","publisher":"Melbourne Water Corporation","sourceUrl":"https://services5.arcgis.com/ZSYwjtv8RKVhkXIL/arcgis/rest/services/Sewerage_Network_Basins/FeatureServer/1","catalogueUrl":"https://discover.data.vic.gov.au/dataset/sewerage-network-basins","lastEditUtc":"2019-10-08T02:42:29.043000+00:00","catalogueMetadataPublishedDate":"2024-06-12","catalogueMetadataUpdatedDate":"2025-02-10","retrievedAtUtc":"2026-09-15T04:11:27.100744+00:00","featuresGeojsonFile":"mwSewerBasins.geojson","featureCount":0,"geometryType":"Polygon or MultiPolygon","geometryTreatment":"Whole returned polygons, simplified at 0.0005 degrees with topology preserved. Source geometry retained in originals. 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BRANCH"],"primaryCatchmentNames":["KOROROIT CREEK","MARIBYRNONG RIVER"],"associationBasis":"Local polygon intersection against archived unsimplified API catchment geometry and existing simplified SA2 display geometry."}]},{"code":"213041577","name":"Melton","layers":[{"layerId":"mwSewerBasins","featureIds":[],"names":[],"count":0,"majorCatchmentNames":[],"primaryCatchmentNames":[],"associationBasis":"Local polygon intersection against archived unsimplified API catchment geometry and existing simplified SA2 display geometry."},{"layerId":"mwDrainSubcatchments","featureIds":[401,2372,2373,2374,2445,3048,3050],"names":["ARNOLDS CREEK","ARNOLDS CREEK EAST BRANCH","KOROROIT CREEK (UPPER)","LITTLE BLIND CREEK","RYANS CREEK","TOOLERN CREEK","TRIB OF TOOLERN CREEK"],"count":7,"majorCatchmentNames":["KOROROIT CREEK","TOOLERN CREEK","WERRIBEE RIVER (LOWER)"],"primaryCatchmentNames":["KOROROIT CREEK","WERRIBEE RIVER"],"associationBasis":"Local polygon intersection against archived unsimplified API catchment geometry and existing simplified SA2 display geometry."}]},{"code":"213041578","name":"Melton South - Weir Views","layers":[{"layerId":"mwSewerBasins","featureIds":[],"names":[],"count":0,"majorCatchmentNames":[],"primaryCatchmentNames":[],"associationBasis":"Local polygon intersection against archived unsimplified API catchment geometry and existing simplified SA2 display geometry."},{"layerId":"mwDrainSubcatchments","featureIds":[2372,2785,3033,3034,3048,3050],"names":["ARNOLDS CREEK","ARNOLDS CREEK EAST BRANCH","REES RD DRAIN","TOOLERN CREEK","TRIB OF WERRIBEE RIVER (LOWER)","WERRIBEE RIVER (LOWER)"],"count":6,"majorCatchmentNames":["TOOLERN CREEK","WERRIBEE RIVER (LOWER)"],"primaryCatchmentNames":["WERRIBEE RIVER"],"associationBasis":"Local polygon intersection against archived unsimplified API catchment geometry and existing simplified SA2 display geometry."}]}],"limitations":["Geographic intersection is not a service, ownership, hydraulic connectivity or asset-risk assignment.","These are eight selected SA2 display polygons, not complete councils or the GWW service area.","Surface drainage catchments and sewer catchments describe different systems.","An absent overlap means no matching polygon in this public snapshot; it does not establish absence of catchments or infrastructure.","Display polygons are simplified; exact refers to matching these archived geometries, not survey precision."],"selectionGeometry":{"file":"originals/selected-sa2.geojson","sha256":"0301191130bee8eeb9bb49d673101a7ae01090ec8393301bec4f25ca09104fa0","source":"ABS ASGS Edition 3 (2021) SA2 display polygons","simplification":"Existing maxAllowableOffset=0.0005 degrees; coordinate precision 5 decimals."},"method":"Candidates returned by official spatial-envelope API, downloaded by complete OBJECTID batches; independent Shapely polygon intersections against all archived candidates. Per-SA2 server query IDs checked separately. No name or council joins."}