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  "description" : "\u003cDIV STYLE=\"text-align:Left;\"\u003e\u003cDIV\u003e\u003cDIV\u003e\u003cP\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003eThe MassDEP Wetlands dataset comprises two ArcGIS geodatabase feature classes:\u003c/SPAN\u003e\u003c/P\u003e\u003cUL\u003e\u003cLI\u003e\u003cP\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003eThe \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-weight:bold;font-size:10pt\"\u003eWETLANDSDEP_POLY \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003elayer contains polygon features delineating mapped wetland resource areas and attribute codes indicating wetland type.\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003cLI\u003e\u003cP\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003eThe \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-weight:bold;font-size:10pt\"\u003eWETLANDSDEP_ARC \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003elayer was generated from the polygon features and contains arc attribute coding based on the adjacent polygons as well as arcs defined as hydrologic connections.\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003c/UL\u003e\u003cP\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003eTogether these statewide layers enhance and replace the original MassDEP wetlands layers, formerly known as DEP Wetlands (1:12,000). It should be noted that these layers provide a medium-scale representation of the wetland areas of the state and are for planning purposes only. \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-weight:bold;font-size:10pt\"\u003eWetlands boundary determination for other purposes, such as the Wetlands Protection Act MA Act M.G.L. c. 131 or local bylaws must use the relevant procedures and criteria\u003c/SPAN\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003e.\u003c/SPAN\u003e\u003c/P\u003e\u003cP\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003eThe original MassDEP wetlands mapping project was based on the photo-interpretation of 1:12,000, stereo color-infrared (CIR) photography, captured between 1990 and 2000, and included field verification by the MassDEP Wetlands Conservancy Program (WCP). In 2007 the MassDEP WCP began a statewide effort to assess and where necessary update the original wetlands data. The MassDEP WCP used ESRI ArcGIS Desktop software, assisted by the PurVIEW Stereo Viewing extension, to evaluate and update the original wetlands features based on photo-interpretation of 0.5m, (1:5,000) digital stereo CIR imagery statewide, captured in April 2005. No field verification was conducted on this updated 2005 wetlands data.\u003c/SPAN\u003e\u003c/P\u003e\u003cP\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003eThe 2005 \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-weight:bold;font-size:10pt\"\u003eWETLANDSDEP_POLY \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003elayer includes polygon features that distinguish it from its predecessor by overall changes in size and shape. In addition, new polygons have been created and original ones deleted. Many of the polygons, however, remain the same as in the original layer. All changes have been made according to the techniques described below. For the purpose of cartographic continuity, a small number of coastal polygons outside the state boundary where added based on data provided by the United States Geological Survey (USGS) and the National Oceanic and Atmospheric Administration (NOAA).\u003c/SPAN\u003e\u003c/P\u003e\u003cP\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003eThe 2005 \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-weight:bold;font-size:10pt\"\u003eWETLANDSDEP_ARC \u003c/SPAN\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003elayer was generated to support map display and was designed to cartographically enhance the rendering of wetland features on a base map. Arc features in this layer were generated from the wetland polygons and coding (ARC_CODE) was assigned based on the adjacent polygon types. Hydrologic connection features (ARC_CODE = 7) were then added. Where delineated, these arc features indicate an observed hydrologic connection to or between wetland polygons. Although efforts were made to be comprehensive and thorough in mapping hydrologic connections, due to the limitations of aerial photo-interpretation some areas may have been missed.\u003c/SPAN\u003e\u003c/P\u003e\u003cP STYLE=\"margin:0 0 14 0;\"\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003eThe types of updates made to the original wetland features include alteration, movement/realignment and reclassification. In some cases original wetland areas have been deleted and new areas have been added. Updates to original wetland features resulted from the following factors: changes in the natural environment due to human activity or natural causes; advances in the field of remote sensing, allowing for more refined mapping.\u003c/SPAN\u003e\u003c/P\u003e\u003cP STYLE=\"margin:7 0 7 0;\"\u003e\u003cSPAN STYLE=\"font-weight:bold;font-size:10pt\"\u003eEdit changes to the original wetland data include:\u003c/SPAN\u003e\u003c/P\u003e\u003cUL\u003e\u003cLI\u003e\u003cP STYLE=\"text-align:Justify;font-size:16pt\"\u003e\u003cSPAN STYLE=\"font-size:9pt\"\u003eAddition of new wetland and hydrologic connection features\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003cLI\u003e\u003cP STYLE=\"text-align:Justify;font-size:16pt\"\u003e\u003cSPAN STYLE=\"font-size:9pt\"\u003eAppending (expansion or realignment) of existing (original) wetland and hydrologic connection features\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003cLI\u003e\u003cP STYLE=\"text-align:Justify;font-size:16pt\"\u003e\u003cSPAN STYLE=\"font-size:9pt\"\u003eReclassification of wetlands features, due to change in wetlands environment from the original classification\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003cLI\u003e\u003cP STYLE=\"text-align:Justify;font-size:16pt\"\u003e\u003cSPAN STYLE=\"font-size:9pt\"\u003eMovement (or shifting) of original wetland features to better match the source imagery\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003cLI\u003e\u003cP STYLE=\"font-size:16pt\"\u003e\u003cSPAN STYLE=\"font-size:9pt\"\u003eDeletion of original wetland or hydrologic connection features due to changes in wetlands environment or inconsistency with mapping criteria.\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003c/UL\u003e\u003cP\u003e\u003cSPAN STYLE=\"font-size:10pt\"\u003ePlease note that although efforts were made to be comprehensive and thorough in the evaluation and mapping of statewide wetland resources some areas of the state may have been missed. 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