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Where can I find maps on the internet that I can freely use in my application?
You can find such maps on the NOAA web server:
You can also browse the NGDC web site
These images are public domain as stated at NGDC site.
The images offered here are .GIF .JPG or .MPEG images produced in the National Geophysical Data Center Marine Geology & Geophysics Division, or from MGG data in cooperation with scientists from other organizations.
These images are in the public domain, with the exception of images in outside publications to which we provide links. If you use them, please credit NOAA/NGDC for the image and the underlying data sources/funding institutions of data from which the images were derived.
Here are several other sites that provide map data in a variety of formats, as well as links to other maps sites. Many of these sites offer free maps:
- Digital Chart of the World
- ESRI resources, worldwide and local maps (most of them SHP files)
- U.S. Naval Research Laboratory
- GIS Data Depot
- MAGIC Map and Geographic Information Center
- Map Layers Warehouse - The National Atlas of the United States of America
- USGS National Mapping Division
- NASA satellite views
- Free satellite views: from the OnEarth program