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The boundary was created in ArcHydro using following procedures: 1) The updated watercourse was burned into the DEM, which generates Re-conditioned DEM; 2) Sinks in the Re-conditioned DEM were filled; 3) Flow direction grid was generated from the DEM updated in Steps 2); 4) Flow accumulation grid was generated; 5) Stream Definition grid was generated; 6) Stream Definition Segmentation grid was generated from the result in Step 5); 7) Catchment Grid was generated based on the Stream Definition Segmentation grid; 8) Catchment Grid was then converted to catchment polygons; 9) Drainage lines were generated; 10) Then we generated adjoint catchments and drainage points feature classes; 11) Subwatershed outlet points was digitized in a new feature class layer for the all sub watersheds for which we need to delineate boundaries 12) Run subwatershed delineation process; 13) The subwatersheds where dissolved to create one polygon. In 2008-09 in preparation for the Lake Simcoe Protection Plan data collection was performed on the hydrology layers for the Ramara Creeks, Talbot River, Upper Talbot River, and Whites Creek Subwatersheds of the watershed and the watershed boundary in that area was revised. The following steps were used in the delineation of the boundary in the north eastern portion of the watershed. The same Arc Hydro steps were followed as in the original boundary creation except for one additional step in which the culverts were burned into the DEM at the same time the watercourse was. The dataset was in turn converted to geodatabase format and additional attribute information was added to support the Act and the utility of the product for the end-user.", "geometryType": "esriGeometryPolyline", "sourceSpatialReference": { "wkid": 26917, "latestWkid": 26917, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -5120900, "falseY": -9998100, "xyUnits": 10000, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "Source: Ministry of Environment (MOE)", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "referenceScale": 0.0, "drawingInfo": { "renderer": { "type": "simple", "symbol": { "type": "esriSLS", "style": "esriSLSSolid", "color": [ 146, 39, 143, 255 ], "width": 2.5 } }, "scaleSymbols": true, "transparency": 0, "labelingInfo": null }, "defaultVisibility": true, "extent": { "xmin": 597382.6168999998, "ymin": 4866641.395, "xmax": 649789.5730999997, "ymax": 4878823.791099999, "spatialReference": { "wkid": 26917, "latestWkid": 26917, "xyTolerance": 0.020158876111088613, "zTolerance": 2, "mTolerance": 2, "falseX": -5120900, "falseY": -9998100, "xyUnits": 4.504455473910538E8, "falseZ": 0, "zUnits": 1, "falseM": -100000, "mUnits": 10000 } }, "hasAttachments": false, "htmlPopupType": "esriServerHTMLPopupTypeAsHTMLText", "displayField": "SUBWSHED", "typeIdField": null, "subtypeFieldName": null, "subtypeField": null, "defaultSubtypeCode": null, "fields": [ { "name": "OBJECTID", "type": "esriFieldTypeOID", "alias": "OBJECTID", "domain": null }, { "name": "FID_ROPWATERSHEDLSRCA", "type": "esriFieldTypeInteger", "alias": "FID_ROPWATERSHEDLSRCA", "domain": null }, { "name": "SUBWSHED", "type": "esriFieldTypeString", "alias": "SUBWSHED", "length": 35, "domain": null }, { "name": "ID", "type": "esriFieldTypeInteger", "alias": "ID", "domain": null }, { "name": "SHAPE", "type": "esriFieldTypeGeometry", "alias": "SHAPE", "domain": null }, { "name": "SHAPE.STLength()", "type": "esriFieldTypeDouble", "alias": "SHAPE.STLength()", "domain": null } ], "geometryField": { "name": "SHAPE", "type": "esriFieldTypeGeometry", "alias": "SHAPE" }, "indexes": [ { "name": "R2394_pk", "fields": "OBJECTID", "isAscending": true, "isUnique": true, "description": "" }, { "name": "S1979_idx", "fields": "SHAPE", "isAscending": true, "isUnique": true, "description": "" } ], "subtypes": [], "relationships": [], "canModifyLayer": true, "canScaleSymbols": false, "hasLabels": false, "capabilities": "Map,Query,Data", "maxRecordCount": 2000, "supportsStatistics": true, "supportsExceedsLimitStatistics": true, "supportsAdvancedQueries": true, "supportedQueryFormats": "JSON, geoJSON, PBF", "isDataVersioned": false, "ownershipBasedAccessControlForFeatures": {"allowOthersToQuery": true}, "useStandardizedQueries": true, "advancedQueryCapabilities": { "useStandardizedQueries": true, "supportsStatistics": true, "supportsPercentileStatistics": true, "supportsHavingClause": true, "supportsOrderBy": true, "supportsDistinct": true, "supportsCountDistinct": true, "supportsPagination": true, "supportsTrueCurve": true, "supportsQueryWithDatumTransformation": true, "supportsReturningQueryExtent": true, "supportsQueryWithDistance": true, "supportsSqlExpression": true }, "supportsDatumTransformation": true, "dateFieldsTimeReference": null, "hasMetadata": true, "isDataArchived": false, "archivingInfo": { "supportsQueryWithHistoricMoment": false, "startArchivingMoment": -1 }, "supportsCoordinatesQuantization": true, "supportsDynamicLegends": true }