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The first polygon is the entire footprint of the GAM and the second polygon is the active extent/domain of the GAM.Each GAM has a unique model id number in the gam_id column that can be used to filter the dataset to only see the extent of that GAM. The attributes are described below. It is best to filter this dataset by the gam_id and gam_status columns.AttributeDescriptiongam_id Unique id number of the groundwater availability model versionextentFull = full model footprintActive = active model footprintgam_nameName of the groundwater availability modelgam_statuscurrent - Model is currently recognized as the official TWDB model for the specified aquifers.alternative - Model is currently being used for joint planning.obsolete - Model has been superseded by a newer model.", "canModifyLayer": true, "supportedSpatialRelationships": [ "esriSpatialRelIntersects", "esriSpatialRelContains", "esriSpatialRelCrosses", "esriSpatialRelEnvelopeIntersects", "esriSpatialRelIndexIntersects", "esriSpatialRelOverlaps", "esriSpatialRelTouches", "esriSpatialRelWithin", "esriSpatialRelRelation" ], "geometryProperties": { "shapeAreaFieldName": "Shape.STArea()", "shapeLengthFieldName": "Shape.STLength()", "units": "esriFeet", "mapUnits": {"uwkid": 9003} }, 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"Shape", "type": "esriFieldTypeGeometry" }, "copyrightText": "Texas Water Development Board, Groundwater Modeling Section. 2026", "geometryType": "esriGeometryPolygon" }