WETLANDS
Status: Obtained in 1996, data not finalized
SOURCE/CONVERSION METHODOLOGY
This datalayer is obtained from the Massachusetts Department of Environmental Protection’s GIS program. Wetlands were interpreted from stero, 1:12000 scale, color-infrared photography by the Resource Mapping Unit at UMASS Amherst.
The interpretation is field checked by Department of Environmental Protection’s (DEP) Wetlands Conservancy Program (WCP). The wetlands interpretation is digitized by Mass. DEP from mylar overlays. This coverage has not gone through final QA/QC process.
COVERAGE NAME
WETLANDS
FEATURE TYPE
POLYGONS
ATTRIBUTES
Polygon Attribute Table (WETLANDS.PAT):
Arc: items wetlands.pat
| COLUMN | ITEM NAME | WIDTH | OUTPUT | TYPE* | N.DEC | ALTERNATE NAME | INDEXED? |
| 1 | AREA | 4 | 12 | F | 3 | - | |
| 5 | PERIMETER | 4 | 12 | F | 3 | - | |
| 9 | WETLANDS# | 4 | 5 | B | - | - | |
| 13 | WETLANDS-ID | 4 | 5 | B | - | - | |
| 17 | ID | 4 | 4 | I | - | - | |
| 21 | TYPE** | 5 | 5 | C | - | - | |
| 26 | DESC | 30 | 30 | C | - | - | |
| 56 | AREA-ACRES | 10 | 10 | N | 3 | - | |
| 66 | PHOTODATE | 8 | 8 | D | - | - | |
--REDEFINED |
ITEMS-- | ||||||
| 9 | LPOLY# | 4 | 5 | B | - | - | |
| 9 | RPOLY# | 4 | 5 | B | - | - |
* See Appendix G for detail
** Wetlands Type
U = Upland
DM = Deep Marsh
M = Marsh
OW = Open fresh water
SS = Shrub swamp
WS1 = Deciduous swamp
WS3 = Mixed wooded swamp
Sample record from the WETLANDS polygon attribute table:
Arc: list wetlands.pat
4
AREA = 6526.172
PERIMETER = 417.426
WETLANDS# = 4
WETLANDS-ID = 3
ID = 0
TYPE = M
DESC = Marsh
AREA-ACRES = 0.150
PHOTODATE =
COORDINATE SYSTEM
Massachusetts State Plane North America Datum (NAD) 83 Feet