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There are 2 kinds of data: raster GIS files — surfaces with limited precision represented by dots (pixels) — most of time topographic data; and vector GIS files — dots, lines and polygons. Below are both the biggest families, and some links to download the files needed for this tutorial.
Online collection of all digital USGS 1:24K scale topographic maps (as well as various other GIS data) covering the United States, available as a free download. NPScape United States Department of the Interior National Park Service NPScape is a landscape dynamics monitoring project that provides landscape-level data, tools, and evaluations for ...
The Libre Map Project was started by Jared Benedict and around 100 additional individuals contributing money to purchase (or "liberate") a full set of 1:24K scale USGS topographic maps in Digital raster graphic form. [1] The map files were then hosted by archive.org to ensure the map data will continue to be freely available to everyone ...
A digital raster graphic (DRG) is a digital image resulting from scanning a paper USGS topographic map for use on a computer. DRGs created by USGS are typically scanned at 250 dpi and saved as a TIFF .
Integrated Land and Water Information System (ILWIS) is a geographic information system (GIS) and remote sensing software for both vector and raster processing. Its features include digitizing, editing, analysis and display of data, and production of quality maps.
What we want is this: a high quality topographic output. With QGis and experience, you can get this in about 5 to 10 minutes. You are now working with QGis, your GIS data—namely, ETOPO1—and your customized palette. To output your first topographic background, don't use File > Save as Image, which is a simple screenshot.
Formerly, most GIS raster layers were provided through many small tiles to download separately (lighter to download), then to merge together on your computer. However, since 2011, the new NASA downloading system : NASA / USGS: 2011 NASA Global data explorer (2011, Public domain). Specifics: several topographic layer(s), datum WGS 84.
Vicmap Topographic Map Series is a series of topographic maps covering the State of Victoria, Australia.Created and maintained by the State of Victoria, the map series is currently in a transition phase, with traditional Vicmap Topographic maps being gradually replaced with a new map series.