Image: Silva Island, USGS, 1897
Silva_Island,_USGS,_1897.png (400 × 400 pixels, file size: 319 KB, MIME type: image/png)
Description: USGS aerial imagery of an island in the w:San Francisco Bay Area. Original map is from 1897, at 1:62500 scale. Image cropped from USGS historical map, available from TopoViewer.
Title: Silva Island, USGS, 1897
Credit: https://ngmdb.usgs.gov/topoview/viewer/
Author: USGS
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
Image usage
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