This GeoPackage, WBPHS_Segments.gpkg, contains the WBPHS survey design segments that are flown in Alaska and Old Crow Flats, Yukon Territory. (One or more contiguous segments comprise a transect.)
The set of segments contained in this file was established in 1964. In the years 1957-1963, the survey design included many, but not all, of these segments. Additional segments were flown in some or all years during 1957-1963 that were discontinued in 1964. The metadata author was unable to interpret existing survey documentation sufficiently to determine the locations of the discontinued segments.
Segment 01-06-03 has not been surveyed since 2010, due to excessive urbanization and resulting safety and disturbance concerns.
Note: The length of a segment varies depending on which stratum it is located in. Strata 1, 2, 3, 4, 5, 6, 8, 9, 10, 11: segment length = 16 miles; stratum 7: segment length = 8 miles; stratum 12: segment length = 18 miles.
