Layers:

Layer: Mass DEP Wetlands (2005) (0)

Name: Mass DEP Wetlands (2005)

Display Field: WETCODE

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-size:10pt">The MassDEP Wetlands dataset comprises two ArcGIS geodatabase feature classes:</SPAN></P><UL><LI><P><SPAN STYLE="font-size:10pt">The </SPAN><SPAN STYLE="font-weight:bold;font-size:10pt">WETLANDSDEP_POLY </SPAN><SPAN STYLE="font-size:10pt">layer contains polygon features delineating mapped wetland resource areas and attribute codes indicating wetland type.</SPAN></P></LI><LI><P><SPAN STYLE="font-size:10pt">The </SPAN><SPAN STYLE="font-weight:bold;font-size:10pt">WETLANDSDEP_ARC </SPAN><SPAN STYLE="font-size:10pt">layer was generated from the polygon features and contains arc attribute coding based on the adjacent polygons as well as arcs defined as hydrologic connections.</SPAN></P></LI></UL><P><SPAN STYLE="font-size:10pt">Together 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. </SPAN><SPAN STYLE="font-weight:bold;font-size:10pt">Wetlands 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</SPAN><SPAN STYLE="font-size:10pt">.</SPAN></P><P><SPAN STYLE="font-size:10pt">The 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.</SPAN></P><P><SPAN STYLE="font-size:10pt">The 2005 </SPAN><SPAN STYLE="font-weight:bold;font-size:10pt">WETLANDSDEP_POLY </SPAN><SPAN STYLE="font-size:10pt">layer 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).</SPAN></P><P><SPAN STYLE="font-size:10pt">The 2005 </SPAN><SPAN STYLE="font-weight:bold;font-size:10pt">WETLANDSDEP_ARC </SPAN><SPAN STYLE="font-size:10pt">layer 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.</SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN STYLE="font-size:10pt">The 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.</SPAN></P><P STYLE="margin:7 0 7 0;"><SPAN STYLE="font-weight:bold;font-size:10pt">Edit changes to the original wetland data include:</SPAN></P><UL><LI><P STYLE="text-align:Justify;font-size:16pt"><SPAN STYLE="font-size:9pt">Addition of new wetland and hydrologic connection features</SPAN></P></LI><LI><P STYLE="text-align:Justify;font-size:16pt"><SPAN STYLE="font-size:9pt">Appending (expansion or realignment) of existing (original) wetland and hydrologic connection features</SPAN></P></LI><LI><P STYLE="text-align:Justify;font-size:16pt"><SPAN STYLE="font-size:9pt">Reclassification of wetlands features, due to change in wetlands environment from the original classification</SPAN></P></LI><LI><P STYLE="font-size:16pt"><SPAN STYLE="font-size:9pt">Movement (or shifting) of original wetland features to better match the source imagery</SPAN></P></LI><LI><P STYLE="font-size:16pt"><SPAN STYLE="font-size:9pt">Deletion of original wetland or hydrologic connection features due to changes in wetlands environment or inconsistency with mapping criteria.</SPAN></P></LI></UL><P><SPAN STYLE="font-size:10pt">Please 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. Many of the wetland and hydrologic connection features remain the same as in the original data. The polygon attribute SOURCE_SCALE may be used to identify areas that have been altered from the original wetlands. The SOURCE_SCALE code 5000 indicates an updated wetland area. The SOURCE_SCALE code 12000 indicates an unaltered, original wetland polygon.</SPAN></P></DIV></DIV></DIV>

Service Item Id: 6182a03ca3ba4a589b051c7082f70f65

Copyright Text: Massachusetts Deptartment of Environmental Protection (MassDEP) Wetlands Conservancy Program (WCP)

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

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Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:
XMin: 243703.76039999723
YMin: 874874.8979999982
XMax: 249536.6054000035
YMax: 881016.3321000002
Spatial Reference: 26986  (26986)  LatestVCSWkid(0)



Drawing Info:
Renderer:
Unique Value Renderer:
Field 1: POLY_CODE
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
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Default Label: N/A
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  Label: Reservoir (with PWSID)
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• Value: 2
  Label: Marsh/Bog
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  Symbol:
  
• Value: 3
  Label: Wooded marsh
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  Symbol:
  
• Value: 6
  Label: Open Water
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HasZ: false

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Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:
• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• WETCODE ( type: esriFieldTypeInteger, alias: WETCODE )
• IT_VALC ( type: esriFieldTypeString, alias: IT_VALC, length: 16 )
• IT_VALDESC ( type: esriFieldTypeString, alias: IT_VALDESC, length: 60 )
• POLY_CODE ( type: esriFieldTypeInteger, alias: POLY_CODE )
• SOURCE ( type: esriFieldTypeString, alias: SOURCE, length: 12 )
• SOURCE_SCA ( type: esriFieldTypeInteger, alias: SOURCE_SCA )
• AREAACRES ( type: esriFieldTypeDouble, alias: AREAACRES )
• AREASQMI ( type: esriFieldTypeDouble, alias: AREASQMI )
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• Shape.STLength() ( type: esriFieldTypeDouble, alias: Shape.STLength() )