Appendix A
APPENDIX A
GEOGRAPHIC INFORMATION SYSTEM DATA SOURCES
1. Town boundaries are from the VGIS coverage TBHASH. This data set was developed from the best
available town boundary sources. These sources include town parcel maps and USGS topographic
maps.
2. Surface waters (rivers, streams, lakes, and ponds) data were derived from 1:100,000 US Geological
Survey Digital Line Graph data. These source data were edited and annotated by Windham Regional
Commission.
3. Roads displayed on this map were extracted from the VGIS coverage RDS. These data originate at
the Vermont Agency of Transportation (AOT) and are based on data digitized from 1991 1:5000
orthophotos by Greenhorne & O'Mara Inc. under contract with OGIS. Updates to these data were
performed by AOT, Regional Planning Commissions, and by information provided by microDATA,
Inc. using GPS technology during data collection for Enhanced 9-1-1.
4. Soils data were derived from the VGIS coverage SOAG, and is based on digitized county soil survey
data. The SOAG data layer was developed by extracting those polygons with an Important Farmland
Soil rating of Prime or Statewide.
5. Sand and gravel resources are from the VGIS data layer AGGRES. This data layer was derived from
the series “Geology for Environmental Planning,” published by the Vermont Geological Survey.
6. Surface water source protection area data developed by Vermont Agency of Natural Resources,
Water Supply Division and based on areas delineated on 1:24000-scale topographic maps. These data
are current to 2005.
7. Well head protection area data were developed by Vermont Agency of Natural Resources, Water
Supply Division and based on areas delineated on 1:24000-scale topographic maps. These data are
current to 2005.
8. Public water supply source locations are from data developed by Vermont Agency of Natural
Resources, Water Supply Division and generally based on locations determined using GPS
technology, with a few locations from delineations on 1:24000-scale topographic maps. These data
are current to 2005.
9. Electric transmission line locations are from the VGIS data layer ELTRN. These data were digitized
from 1:5000 orthophotos.
10. Electric generation facility locations are from GIS data provided by Vermont Electric Power
Company (VELCO). These data were updated by Windham Regional Commission to include the
Searsburg wind generation facility.
11. Electric utility franchise areas are from GIS data provided by Vermont Electric Power Company
(VELCO). Franchise area boundaries are approximate and were originally developed for mapping at a
state-wide level.
12. Data on transfer stations were developed by Windham Regional Commission. Locations were
determined using 1:5000 VGIS base data.
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Adopted October 24, 2006
Appendix A
13. Data on closed landfills were developed by Windham Regional Commission. Locations were
determined using 1:5000 VGIS base data.
14. Data on municipal water and sewer service were developed by Windham Regional Commission.
Symbols on the map are meant to identify the presence municipal water and sewer service in the area,
but the symbols do not specifically locate the service areas.
15. Dam locations are from the VGIS data layer DAMS, produced by the Vermont Agency of Natural
Resources. The data are based on the VT Dams Inventory. ANR states that “this data is not a digital
representation of all dams in Vermont.
16. Impaired waters are those that are listed in the State of Vermont Year 2000 List of Waters. They were
mapped by Windham Regional Commission using 1:100,000 US Geological Survey Digital Line
Graph data.
17. Structure locations are from the VGIS data layer ESITE. The locations were captured using Global
Positioning System technology by microDATA, St. Johnsbury, VT for Vermont's Enhanced 9-1-1
program, and are current to 2006. All primary residential, commercial, industrial, and public
buildings are included.
18. Base data for this land cover map are taken from the Windham Regional Commission’s GIS data
layer REGION\LANDCOV, created in 1999. This data layer is a composite of existing data layer and
newly created data. Data on wetlands are from US Fish and Wildlife Service's National Wetlands
Inventory (NWI) maps. These maps show approximate locations of wetlands that are generally 3
acres or larger in size. Data on open lands have their origin in the VGIS data layer LCLU. This
coverage was produced by Mount Holyoke College using Landsat Thematic Mapper satellite data.
Additional spatial operations were performed by WRC to refine these data. Locations of urban/builtup lands depict those areas where structure density is generally greater than one structure every two
acres, or those areas covered by public highways or railroads. Structure locations were derived from
1:5000 orthophotos but have not been verified. This delineation is intended to show areas of denser
development on a regional scale only. Roads and railroads were digitized from 1989 1:5000
orthophotos.
19. The public and independent schools and colleges shown on this map are those that are listed with the
State of Vermont, Department of Education. The facilities were located by the Windham Regional
Commission using 1:5000 Vermont orthophotos or from the VGIS data layer ESITE (which includes
building locations captured using Global Positioning System technology by microDATA, St.
Johnsbury, VT for Vermont's Enhanced 9-1-1 program).
20. The libraries shown on this map are those listed with the State of Vermont Department of Libraries.
The facilities were located by the Windham Regional Commission using 1:5000 Vermont
orthophotos or from the VGIS data layer ESITE (which includes building locations captured using
Global Positioning System technology by microDATA, St. Johnsbury, VT for Vermont's Enhanced 91-1 program).
21. Public and private conservation lands data were obtained from the Vermont Conserved Lands
Database developed by UVM Spatial Analysis Laboratory. These data are now part of the VGIS data
layer CONSPUB and CONSPRI, and are current to 2004.
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Adopted October 24, 2006
Appendix A
22. Waste management zones were mapped by Windham Regional Commission by using information
provided by Agency of Natural Resources in 2001, and updated by WRC in 2006.
23. Areas dominated by floodplains were delineated by Windham Regional Commission. These areas are
generalized representations of 100-year flood areas found on FEMA’s Flood Hazard Area Maps and
Flood Insurance Rate Maps.
24. Areas dominated by wetlands were delineated by Windham Regional Commission. These are areas
generally greater than 25 acres that are predominantly wetland. This data layer was produced by
processing National Wetlands Inventory GIS data using Spatial Analyst software, and is intended
only to show a regional depiction of large wetland complexes.
25. Watersheds of Class A(1) waters were delineated on 1:24000 USGS topographic maps and then
digitized by Windham Regional Commission using Class A(1) waters descriptions from the Vermont
Environmental Board.
26. Watersheds of Class A(2) waters are from surface water source protection area data developed by VT
ANR Water Supply Division and based on areas delineated on 1:24000-scale topographic maps. Data
are current to 2005.
27. Boundaries for lands over 2500 feet in elevation are from the VGIS data layer CON2500. These data
were digitized by Vermont Agency of Natural Resources from 1:24000-scale USGS topographic
maps.
28. Locations of rare, threatened, and endangered species and significant natural communities are from
the VGIS data layer ENDANGER. These data were derived from VT Agency of Natural Resources,
Department of Fish and Wildlife, Nongame and Natural Heritage Program's Rare, Threatened and
Endangered Species and Significant Natural Communities database. The database is current to 2003.
Locations are approximate, but generally within 200 meters. The actual area represented by the
species or community may be a few square feet or many hundreds of acres. For further information,
contact the Nongame and Natural Heritage Program.
29. Deer wintering areas are taken from the VGIS data layer DEERWN. These areas were delineated by
Vermont Agency of Natural Resources, Department of Fish and Wildlife onto 1:24000-1:25000 scale
topographic maps. Digital data released in April 1997 were used.
30. Bear habitat and corridor data are from GIS data provided the University of Vermont’s Spatial
Analysis Laboratory. This data layer was developed from Vermont Agency of Natural Resources,
Department of Fish and Wildlife habitat boundary maps, which are based on photocopies of 1:63,360scale General Highway Maps. The corridor locations are approximate.
31. The two regionally significant bear travel corridors were identified by Vermont Agency of Natural
Resources personnel on topographic maps and then digitized by Windham Regional Commission in
December of 1992 and updated in October 2000. Black bear travel corridors, according to Forrest
Hammond, biologist with the Vermont Department of Fish and Wildlife, are forested habitats that are
regionally important and are used by large numbers of bears to access critical seasonal foods or to
link bear ranges and sub-populations. Travel corridors are comprised of bear travel routes and may
include one or more road crossing areas.
32. Data on villages with pedestrian facilities was developed by Windham Regional Commission.
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Adopted October 24, 2006
Appendix A
33. Data on public transit stations were developed by Windham Regional Commission from digitized
1:1250-scale Vermont Base Maps using information from the public transit providers.
34. Data on local and intercity bus routes were developed by Windham Regional Commission using
information provided by the bus route operators.
35. Data on proposed transportation system improvements were developed by Windham Regional
Commission.
36. Slope categories and shaded relief data were developed by Windham Regional Commission using
1:24000-scale USGS Digital Elevation Models. Data processing was performed using Spatial Analyst
software.
37. Watershed boundaries are based on data in the VGIS data layer WATSHED. This coverage contains
data derived from 1:24,000-scale USGS maps of Natural Resources Conservation Service hydrologic
unit boundaries. The data were edited by Windham Regional Commission and attributed to match the
watershed delineations and coding schemes of Vermont Agency of Natural Resource's river basins
and surface waterbodies.
38. Proposed land use district boundaries were developed by Windham Regional Commission.
39. Locations of governmental services are tied to the building in which these services originate.
Building locations were determined by Windham Regional Commission using 1:5000 Vermont
orthophotos or from the VGIS data layer ESITE (which includes building locations captured using
Global Positioning System technology by microDATA, St. Johnsbury, VT for Vermont's Enhanced 91-1 program).
40. The child care centers shown on this map are those listed with Windham Child Care Association,
Springfield Area Parent Child Center, and the Bennington County Child Care Association. These
facilities were located by the Windham Regional Commission using 1:5000 Vermont orthophotos or
from the VGIS data layer ESITE (which includes building locations captured using Global
Positioning System technology by microDATA, St. Johnsbury, VT for Vermont's Enhanced 9-1-1
program).
41. The senior centers, adult day centers, and the facilities for the care of the aged and disabled shown on
this map are those nursing or residential care facilities listed with the Vermont Department of Aging
and Independent Living. The facilities were located by the Windham Regional Commission using
1:5000 Vermont orthophotos or from the VGIS data layer ESITE (which includes building locations
captured using Global Positioning System technology by microDATA, St. Johnsbury, VT for
Vermont's Enhanced 9-1-1 program).
42. Health care facilities include general hospitals, mental health hospitals, and certified rural health
clinics listed with the Vermont Department of Health. The facilities were located by the Windham
Regional Commission using 1:5000 Vermont orthophotos or from the VGIS data layer ESITE (which
includes building locations captured using Global Positioning System technology by microDATA, St.
Johnsbury, VT for Vermont's Enhanced 9-1-1 program).
43. Information on the teen centers, was provided by the Vermont Coalition of Teen Centers. The
facilities were located by the Windham Regional Commission using 1:5000 Vermont orthophotos or
from the VGIS data layer ESITE (which includes building locations captured using Global
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Adopted October 24, 2006
Appendix A
Positioning System technology by microDATA, St. Johnsbury, VT for Vermont's Enhanced 9-1-1
program).
44. The historic districts shown on this map are those listed on the state or national register of historic
places. The general location of these districts was determined by the Windham Regional Commission
using 1:5000 VGIS base data.
Windham Regional Plan
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Adopted October 24, 2006