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Choosing the appropriate data format

Feed-icon-16x16 GeoRSS Atom feed
Better suited for consumption by automated programs capable of handling RSS or Atom files. Allows subscription to data feed for continuous updates.
Kml_icon KML
Used to display geospatial data in Google Earth, Google Maps, and similar applications.
Communicator GPX
Used to download the information to your GPS receiver for using when you're traveling.
Text/CSV
Use this format for easy access to the data. Text/CSV files could be opened by most desktop spreadsheet applications (e.g. MS Excel).
JSON
XML
Better suited for consumption by automated programs capable of handling raw XML files.
Shapefiles
Used for consumption by ESRI-compatible mapping applications.