Global Mapper is more than just a viewer capable of displaying the most popular raster, elevation and vector datasets. It converts, edits, prints, tracks GPS and allows you to utilize GIS functionality on your datasets in one low-cost and easy-to-use software package.
Global Mapper is more than just a utility; it has built in functionality for distance and area calculations, raster blending, feathering, spectral analysis and contrast adjustment, elevation querying, line of sight calculations, cut-and-fill volume calculations, as well as advanced capabilities like image rectification, contour generation from surface data, view shed analysis (including Fresnel) from surface data, terrain layer comparison (including differencing), and triangulation and gridding of 3D point data. Repetitive tasks can be accomplished using the built in scripting language or comprehensive batch conversion functionality. It also includes the ability to directly access multiple online sources of imagery, topographic maps, and gridded terrain data. This includes access to worldwide high resolution color imagery from Digital Globe/GlobeXplorer/AirPhotoUSA (watermarked access for free) and access to the entire TerraServer-USA database of USGS satellite imagery and topographic maps free-of-charge.
Global mapper
Global Mapper also has the ability to easily access WMS data sources, including built-in access to elevation data and color imagery for the entire world, and to view elevation data in true 3D with any loaded raster imagery and vector data draped on top of it!
Global Mapper is a comprehensive software package which includes much more functionality than listed here. Find out more by following this link. Global Mapper overview.
site：
http://www.globalmapper.com
http://www.rockware.com/product/overview.php?id=91
