APB_NWR

Tags  Alaska Peninsula, Becharof, National Wildlife Refuge, NWR, USFWS, FWS, boundary, generalized, unofficial

Summary

This feature class depicts simplified boundaries of the Alaska Peninsula and Becharof National Wildlife Refuge complex in Alaska for quick reference.

Description

These polygon features were generalized from U.S. Fish and Wildlife Service cadastral data, specifically the Approved Acquisition Boundaries (available at https://ecos.fws.gov/ServCat/Reference/Profile/131755). A subset of this national data set was first exported to include only features within the Alaska Region. This new feature class was then projected to a local coordinate system, NAD83 Alaska Albers. 
Polygons representing Alaska Peninsula NWR were exported to a new feature class, which--after removing small polygons less than 150 square kilometers (using Esri's Eliminate Polygon Part tool)--was further simplified using Esri's Generalize tool, with a simplification tolerance of 550 meters. Likewise, features representing Becharof NWR were exported to a new feature class and simplified using Esri's Generalize tool, with a simplification tolerance of 100 meters. Prior to exporting as geoJSON, both feature classes were merged and projected from NAD83 Alaska Albers to WGS 84.
Note that topology was not enforced during simplification or merging, resulting in overlapping features along the border between these two refuges.
This feature class depicts simplified boundaries of the Alaska Peninsula and Becharof National Wildlife Refuge complex in Alaska and warrants the following limitations:
 1) must not be used for official or legal  purposes such as acreage computations or the field location of Refuge boundaries.
 2) intended to be used only for small-scale (<1:5,000,000) depiction of the Refuge boundaries.
If you require the official, full-resolution boundaries of the National Wildlife Refuges in Alaska, you may download them at https://www.fws.gov/r7/nwr/Realty/data/LandMappers/Public/Help/HTML/NationalWildlifeRefugeandWildern.html

Credits

USFWS, Alaska Region

Use limitations

For small-scale, general use/depiction of Refuge boundaries. Do not use for official or legal purposes. Do not use for legal or official acreage computations.

Extent

Scale Range