File:G-F triangulation.jpg
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G-F_triangulation.jpg (272 × 400 pixels, file size: 21 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:46, 30 April 2008 | 272 × 400 (21 KB) | wikimediacommons>Jheald | {{Information |Description=en:Gemma Frisius's 1533 diagram introducing the idea of en:triangulation into the science of surveying. Having established a baseline, eg the cities of Brussels and Antwerp, the location of other cities, eg Middelberg |
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