If you need to make a high-resolution satellite map of a city or any specified area, then AllMapSoft's Google Satellite Maps Downloader (GSMD for short) this straightforward and intuitive small app can help you a lot. It automatically and very fast downloads numerous small piece of satellite maps on Google Maps (according to the user specified geographical coordinates: latitude and longitude range + zoom level) with ease, then combines them together and outputs as a huge image file in multiple common-used formats.