File:US ground conductivity map.webp
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Size of this PNG preview of this WEBP file: 800 × 221 pixels. Other resolutions: 320 × 88 pixels | 640 × 177 pixels | 1,024 × 283 pixels | 1,280 × 353 pixels | 2,560 × 707 pixels | 11,671 × 3,223 pixels.
Original file (11,671 × 3,223 pixels, file size: 114.39 MB, MIME type: image/webp)
Summary
| Description |
English: Map of ground conductivity in the continental United States, c. 1975. |
| Date | circa 1975 |
| Source | https://www.fcc.gov/media/radio/m3-ground-conductivity-map |
| Author | United States Geological Survey |
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Federal Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:43, 25 February 2024 | | 11,671 × 3,223 (114.39 MB) | wikimediacommons>The Quirky Kitty | Uploaded a work by United States Geological Survey from https://www.fcc.gov/media/radio/m3-ground-conductivity-map with UploadWizard |
File usage
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