Transcription of USGS QUADRANGLES IN GOOGLE EARTH - Earth …
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USGS QUADRANGLES IN GOOGLE EARTH - Earth …
November 2017 1 of 6 usgs QUADRANGLES IN GOOGLE EARTH By Thomas G. Davis1, PhD, PE, PLS and Rollins Turner2, PhD INTRODUCTION QUADS ( ) is a web-based service for visualizing usgs quadrangle boundaries in GOOGLE EARTH that provides an easy-to-use framework for retrieving geospatial PDF topo maps. QUADS also includes usgs overlays for topographic-bathymetric and hydrographic maps. QUADS The principal component of QUADS is a GOOGLE EARTH network link that plots approximate usgs quadrangle boundaries (Fig. 1) and provides direct access to 127,692 geospatial PDF maps, including scans of the last historical paper map in all available grid sizes. All quadrangle balloons (Fig. 2) contain name, primary state, nominal grid size, scale, imprint year, and file size information with a link to the corresponding PDF map.
November 2017 1 of 6 USGS QUADRANGLES IN GOOGLE EARTH By Thomas G. Davis1, PhD, PE, PLS and Rollins Turner 2, PhD INTRODUCTION QUADS (http://www.metzgerwillard.us/quads/) is a web-based service for visualizing
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