Amerisurv Feature - The Early Vertical Datums of the U. S. Geological Survey - GIS user technology news https://gisuser.com Mobile, Technology, and Business news Thu, 02 Oct 2014 23:07:48 +0000 en-US hourly 1 https://wordpress.org/?v=6.0.6 Amerisurv Feature – The Early Vertical Datums of the U. S. Geological Survey https://gisuser.com/2014/05/amerisurv-feature-the-early-vertical-datums-of-the-u-s-geological-survey/?utm_source=rss&utm_medium=rss&utm_campaign=amerisurv-feature-the-early-vertical-datums-of-the-u-s-geological-survey Thu, 29 May 2014 21:13:51 +0000 http://gis-user.com/2014/05/amerisurv-feature-the-early-vertical-datums-of-the-u-s-geological-survey/ During the 1896 field season, the surveying crews of the U. S. Geological Survey (USGS) engaged in higher quality and more precise topographic mapping and spirit leveling than had been previously attempted. This change was largely prompted by an act issued by the Fifty-Fourth Congress on June 11, 1896. For USGS, the most significant result […]

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