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This layer depicts the polygon(s) and related attribute information that defines the geographic area of all PSAP boundaries within a given 9-1-1 Authority\u2019s geographic coverage area. The PSAP Boundary layer may have one or many PSAP Boundaries contained in the layer. Each PSAP Boundary defines the geographic area of a PSAP that has primary responsibilities for an emergency request. This layer is used by the ECRF to perform a geographic query to determine the PSAP to which an emergency request is routed. An emergency request is routed using the NG9-1-1 Core Services based upon the geographic location of the request, provided by either a civic address, geographic coordinate or geodetic shapes as defined in NENA-STA-010 [2][1].", "Subject": "NG911 Maryland PSAP boundaries for December 2023.", "Category": "", "Keywords": "NG911,911,Maryland,PSAP,MD iMap" }, "supportsQueryDomains": true, "supportsQueryContingentValues": true, "layers": [ { "id": 0, "name": "Maryland Public Safety Answering Points", "parentLayerId": -1, "defaultVisibility": true, "subLayerIds": null, "minScale": 0, "maxScale": 0, "type": "Feature Layer", "geometryType": "esriGeometryPolygon" } ], "tables": [], "relationships": [], "enableZDefaults": false, "allowUpdateWithoutMValues": false, "supportsVCSProjection": true, "referenceScale": 0, "hasSharedTemplates": true }