It is possible to view and download high resolution satellite georeferenced images and conventional maps submitted by such services as Google Earth, Google Maps, Bing Maps, DigitalGlobe, Yandex, Yahoo! Maps, VirtualEarth, OpenStreetMap with SAS.Planet free program, Downloading maps is implemented as a release area (possibly non-rectangular), and in the process of moving around the map. Maps are updated frequently – the program will allow you to download only the new ones.
One advantage is having georeferenced images to use in ArcGIS, gvSIG, QGIS, Erdas, ENVI, etc.
The first step is to download and run the latest version of application SAS.Planet (no installation required).
Browse the area of interest, select the map server, with the Selection Manager tool, draw the surface download.
Download tab select the type of map and the number of zoom levels. If you want the highest resolution, choose a zoom level of 24.
In the Stitch tab must choose the output format of the images, the options are: JPEG, PNG, BMP, JPEG2000, ECW. Then select the path and name of the output file. Also choose the projection default map projection appears.
These are the minimum required options, the rest is optional, but it is good to play with various options and settings. Now click Start
The georeferenced images can be used in ArcGIS, gvSIG, QGIS, Erdas, ENVI, etc.
Source : http://en.acolita.com/