Geologic map of the Seldovia quadrangle, south-central Alaska

The linework was captured by hand digitizing from 1:63,360 scale mylar maps that were all in excellent condition. The arc and polygon attributes are based on field work and on previously published mapping that is cited, as appropriate, on an inset of the PDF and Illustrator files. Water bodies were digitized from the 1:63,360 scale topographic maps. Glaciers and permanent icefields were digitized from 1:63,360 scale topographic maps, but were modified as needed, based on 1978-1984 vintage air photos, where glacial retreat had been significant. The digital coastline, provided by the State of Alaska, Dept. of Natural Resources, was based on 1:63,360 topographic maps. This digital data set was prepared in the aftermath of the Exxon Valdez oil spill. The source of line- and polygon data is not coded in attribute tables. The map was checked for accuracy by visually comparing the digital product against hand-colored ozalids of the mylars. This thematic bedrock map depicts geologic units present beneath soil or relatively thin mantles of surficial deposits, not necessarily the surficial materials themselves.