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Image: NASA Worldwind, USGS imagery map, Edgerly Island, California

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Original image ‎(1,800 × 1,800 pixels, file size: 3.28 MB, MIME type: image/png)

Description: USGS aerial imagery of an island in the w:San Francisco Bay Area. Backgrounds for these highlight images are black at 85-90% opacity, outlines are 2-10px outside selection border, pure red at 15-25% opacity. Boundaries taken from USGS survey maps (1913 through 2018), reclamation district documents, and county files. This one was difficult since a considerable amount has been added to the island since the initial survey, and some of it is marsh but some of it isn't. Oh well. I've highlighted both.
Title: NASA Worldwind, USGS imagery map, Edgerly Island, California
Credit: NASA tool at worldwind.earth, USGS Topo Imagery map layer
Author: USGS, self
Permission: This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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