Description: Wetland coverages for each PLSS township within the watershed
Last Update:
Data Type: polygon and point
Source Data: DNR Digital Wisconsin Wetland Inventory
Source Data Date:
Source Data Scale: 1:24,000
Source Data Projection: WTM
Wetland coverages corresponding to the watershed were purchased
from the DNR Bureau of Water Regulation & Zoning. The layer
includes a series of polygon coverages and point coverages that
are digitized from 1:24,000 scale Wisconsin Wetland Inventory
(WWI) maps. The point coverage includes information for wetlands
smaller than 2 or 5 acres, depending on the county. Map tiles
for both sets of coverages correspond to Public Land Survey System
(PLSS) Townships. There are a total of 25 polygon coverages
and 12 point coverages for the watershed.
The following data descriptions are provided by the DNR:
PLS: This attribute uses a 5-digit code to identify the Public Land Survey System (PLSS) Township for the coverage. A "4" in the first digit indicates a Range direction of East. A "2" in the first digit identifies a Range direction of West. The second and third digits identify the Township number. The fourth and fifth digits identify the Range number. For example:
41517 = Township 15 North, Range 17 East or T15N R17E
21517 = Township 15 North, Range 17 West or T15N R17W
COUNTY: This attribute contains a 2-digit DNR County Number.
For example: Adams County = 1; Wood County = 72.
WETCODE: The Wisconsin Wetland Inventory Classification Code
describes the dominant vegetative class, subclass, hydrologic
characteristics and special features of the wetland as of the
date the data was originally interpreted. When updated classification
information becomes available, it will be recorded in the NEWCODE
item. Wetland classification codes typically include up to 4 alphanumeric
characters (E2Kg), but when a second vegetative type covers 30%
or more of the area, codes for both types of vegetation are present,
separated by a "/" (S3/E2Kg).
The WETCODE attribute also contains 4 codes that describe non-wetland
features. These codes are:
$ = The $ symbol is placed before a wetland classification code to denote the area is no longer wetland due to filling or draining activities.DWL = Refers to a lake greater than 6 feet deep that is totally surrounded by wetland.
RIVER = Refers to a primary channel of flowing water that has wetland on both sides of the river.
ROAD = Refers to a road that bisects a wetland. It is important to note that while all roads that bisect or abut wetlands are drafted on the WWI maps, only roads that bisect wetlands are digitized.
For a detailed description of wetland classification codes refer to DNR WRZ Publication "Wisconsin Wetland Inventory Classification Guide(DNR PUBL-WZ 023).
DIGITIZED: The date on which the WWI map was originally digitized.
UPDATED: The latest date that the wetland polygon was revised on the hardcopy map.
NEWCODE: The current WWI Classification Code for the represented area. (Refer to the description of the WETCODE item above).
DIGUP: The latest date that a revised wetland polygon was digitally updated. If a wetland polygon has not been revised since it was originally digitized this item will be left blank. If the date indicated in the UPDATED attribute is later than the date in the DIGUP attribute, the digital linework has not been updated.
UPREASON: This attribute consists of 2 single-character codes indicating the reason for creating or updating a given polygon. If a polygon has not been updated since its original automation, this item is left blank.
The codes for the first character are:
CODE and DEFINITION
A = Wetland addition
B = Classification change
C = Linework (delineation) change
The codes for the second character are:
CODE and DEFINITION
A = Dominant vegetation change
B = Reverted back to wetland
C = Map error
D = Filled or drained
E = Digitizing error
F = Wetland restoration
G = Wetland creation
MINUNIT: Minimum mapping unit (2 or 5 acres) for wetland polygons represented in this coverage. The minimum mapping unit is consistent within a given county but will vary from county to county. Wetlands smaller than 2 or 5 acres are indicated by point symbols in the point coverages.
BASEDATE: The date of the 1:24,000 scale ratioed and rectified photographic base maps on which the wetland delineations and point symbols are drafted. These base maps are not used for interpreting wetland delineations, only for drafting wetland boundaries once they are interpreted.
PHOTODATE: The date of 1:20,000 scale stereoscopic aerial photography used to photo interpret wetland delineations and classifications. The date of the base map photography may be different than the date of the stereoscopic photography used to interpret wetlands.
MAPTYPE: This attribute describes the type of 1:24,000 scale
photographic base map used to draft wetland delineations and point
symbols:
CODE and DEFINITION
O = Orthophoto base map
T = PLSS Township centered ratioed/rectified base map
B = Combination of orthophoto and PLSS Township centered base maps used for wetland map drafting
WET-ID: This is a unique ID number assigned to each polygon
that relates to wetland information collected by the U.S. Fish
& Wildlife Service for the Special Wetland Inventory Study
(SWIS).
PLS: This attribute is defined the same as in the polygon coverage.
COUNTY: This attribute is defined the same as in the polygon coverage.
SYMBOL: This attribute contains a code of up to 7 characters
providing information about the wetland point symbols drafted
on the WWI base maps:
CODE and DEFINITION
<5 = Wetland less than 5 acres in size
<2 = Wetland less than 2 acres in size
EXPOND = Excavated pond smaller than 2 or 5 acres
DAMPOND = Dammed pond smaller than 2 or 5 acres
DIGITIZED: This attribute is defined the same as in the polygon coverage.
UPDATED: This attribute is defined the same as in the polygon
coverage.
