| iwwh_Feb2007_PubRevY | |
Data format: Shapefile File or table name: iwwh_Feb2007_PubRevY Coordinate system: Universal Transverse Mercator Theme keywords: Inland Waterfowl Habitat, Inland Wading Bird Habitat, National Wetlands Inventory, Natural Resources Protection Act, Significant Wildlife Habitat |
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| Abstract: This shapefile represents the final phase of the reconciliation between Inland Waterfowl and Wading Bird Habitat (IWWH) polygons mapped by MDIFW regional staff and IWWH polygons generated via an automated system (hereafter referred to as UMO process) developed by Heather Rustigian and William Krohn (USGS Biological Resources Division) to identify high and moderate value waterfowl and wading bird habitats using statewide digital NWI (National Wetlands Inventory) data, aerial imagery, and hydrology data. |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
This shapefile represents the final phase of the reconciliation between Inland Waterfowl and Wading Bird Habitat (IWWH) polygons mapped by MDIFW regional staff and IWWH polygons generated via an automated system (hereafter referred to as UMO process) developed by Heather Rustigian and William Krohn (USGS Biological Resources Division) to identify high and moderate value waterfowl and wading bird habitats using statewide digital NWI (National Wetlands Inventory) data, aerial imagery, and hydrology data.
To obtain a single database incorporating both hand-mapped and field-verified IWWHs and IWWHs identified through the automated UMO process. These IWWH are all CANDIDATE Significant Wildlife Habitats. Each polygon must be field-verified to determine whether it meets the definition under the Natural Resources Protection Act (NRPA).
Five criteria are used to assess IWWHs: dominant wetland type, wetland type diversity, habitat size, wetland type interspersion, and amount of open water. A high to moderate value inland habitat is an inland wetland complex, and a 250 ft buffer, that through a combination of the five criteria listed above, meets MDIFW guidelines or is an inland wetland complex that has documented outstanding use by waterfowl or wading birds. For further information on this rating system please refer to the following document: "GIS-Based Evaluation of Waterfowl and Wading Bird Habitats in Maine" by Heather L. Rustigian and William B. Krohn, University of Maine, Orono, Final Contract Report to the Maine Dept. Inland Fisheries and Wildlife, Augusta, Maine, June 2002. Not all ratings have been field verified. The reconciliation process between the MDIFW-mapped polygons and the UMO-generated polygons involved several steps or decisions. In general, MDIFW polygons were given priority over UMO polygons. Therefore, if there was overlap of MDIFW and UMO polygons, the MDIFW polygons were used to clip the UMO polygons and the MDIFW rating and identifier were retained. If an MDIFW polygon captured areas that were not captured by any UMO polygons, then National Wetlands Inventory (NWI) data, aerial imagery, and hydrology data were used to generate a spatially accurate representation of the wetland complex, which was then buffered to 250 ft to create the final IWWH polygon. If the original MDIFW polygon was rated as indeterminate, the 2-Criteria Rating Procedure based on wetland type interspersion and percent open water, was used in conjunction with NWI data, aerial imagery, and hydrology to determine the polygon's rating of low, moderate, or high. The imagery used to delineate and rate polygons included: DOQQ's (3.3-ft resolution) ranging from 1996-1999 for a majority of the state except the northwest; and ortho-rectified digital imagery (0.5-2 ft ground sample distance) ranging from 2003-2005 for southwest Maine, including the coast; and Fort Fairfield in northern Maine.
publication date
These data are provided by the Maine Department of Inland Fisheries and Wildlife for shoreland zone mapping by Maine Department of Environmental Protection.
650 State Street
Heather L. Rustigian and William B. Krohn, University of Maine, Maine Cooperative Fish and Wildlife Research Unit; Maine Department of Inland Fisheries and Wildlife (MDIFW), Wildlife Resource Assessment Section, Habitat Group; and MDIFW, Wildlife Management Section, Regional staff.
Metadata imported.
Dataset copied.
Metadata imported.
Metadata imported.
Metadata imported.
Metadata imported.
Dataset copied.
Dataset copied.
Area of feature in internal units squared.
ESRI
Feature geometry.
ESRI
Feature ID for relating to MDIFW ACCESS database of Inland Waterfowl and Wading Bird Habitats, except those starting with "UMO" which indicates they were generated by Heather L. Rustigian and William B. Krohn, University of Maine, Maine Cooperative Fish and Wildlife Research Unit.
MDIFW
Polygons mapped by UMO automated process
Polygons mapped by MDIFW
Rating of the IWWH (moderate and high-value polygons are considered as candidate NRPA habitats). See the Supplemental Information section of the layer description for rating criteria.
Acreage of the IWWH polygon
MDIFW
Public Review = whether this feature should be used for public distribution (outside MDIFW) or permit reviews. Y = Yes (meets NRPA definition of a Significant Wildlife Habitat; rating = moderate or high). N = No (rating = low).
MDIFW
Internal feature number.
ESRI
Perimeter length of feature in internal units.
Number that corresponds to the IWWH_ID field of the Shoreland Zoning IWWH layer provided to Maine Department of Environmenal Protection. If value is zero, it does not correspond because the polygon is rated as low and not included in the DEP Shoreland Zoning IWWH layer. This number is intended to facilitate identification of corresponding features in both layers. Polygons abutting each other in the DEP layer were dissolved into one feature, so there may be many features from this layer that correspond to one feature of the DEP layer, but not vice versa.
acreage of the wetland area; calcluted only for wetlands with areas at least 10 acres
SDE MEGIS MEIFW.ShoreZone_IWWH
650 State Street
650 State Street
