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Original file (1,484 × 2,434 pixels, file size: 2.37 MB, MIME type: image/png)
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Summary
| Description |
English: Two complete Bilby Towers on Transcontinental Geodimieter Traverse. (original image caption) |
| Date | |
| Source |
Bilby Steel Tower for Triangulation (PDF), Coast and Geodetic Survey, Publication 62-3 (1965), page 4 https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/cgs_specpubs/QB275U352no62-3.PDF |
| Author | LCDR James K. Richards, US Coast & Geodetic Survey |
Licensing
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This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:44, 11 August 2023 | | 1,484 × 2,434 (2.37 MB) | Obscure2020 | Extracted original image from PDF source, cropped, then optimized using OxiPNG and ZopfliPNG. |
| 23:31, 2 May 2018 |  | 527 × 844 (500 KB) | Bri | Cropped | |
| 23:29, 2 May 2018 |  | 705 × 981 (452 KB) | Bri | User created page with UploadWizard |
File usage
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