Tuesday, October 09, 2007
USGS Ortho-Imagery Viewer/Downloads
Need Orthos?? The USGS is now offers seamless 1 meter Orthoimagery. This orthoimagery product is USGS Digital Orthoimagery Quarter Quadrangles (DOQQ), but as a seamless product. The source data is the original USGS DOQQ's. To see available areas, on the right side of the map interface, under the Display tab, click the arrow next to the category Layer Extent. A list of layers will appear, find the desired DOQQ Index and click the box next to it. This will automatically update the map with the index showing areas of coverage. As more data is loaded, they will be incorporated into the seamless system. See http://gisdata.usgs.gov/website/orthoimagery
Monday, October 08, 2007
Didger 4 links directly to the USGS TerraServer database
Golden Software, Inc. has upgraded Didger, its comprehensive software package that provides a single user interface for digitizing, geographic referencing, reprojection and coordinate conversion, and mosaicking, with more than 100 new features and enhancements. Among the many new features is the ability to have Didger automatically digitize polylines and polygons from any source image. This saves the user time and frustration by letting Didger do the meticulous digitizing for them. Didger also includes the ability to link directly to the USGS TerraServer database. Users can download and import georeferenced satellite imagery and topographic maps of the United States free of charge. See more on Didger at http://www.goldensoftware.com/products/didger/didger.shtml - cost is only $389!
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