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What are the URLs for imagery services in The National Map, and are they cached or dynamic?

There are several imagery services for The National Map.  Some imagery services are cached and some are dynamic:

  • USGSImageryOnly (under Base Maps), for example, is a tile cache base map service of orthoimagery. It has different imagery data sources depending on view scale. The USGSImageryOnly service uses cache tiles of 256x256 pixels in size and 96 dots per inch (dpi) resolution with 75% compression quality. 

  • NAIP Plus (under Theme Overlays) is an example of a dynamic map service. It includes 1-meter resolution data from the National Agriculture Imagery Program (NAIP). 

Learn more: Video lessons for using The National Map Products and Services