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Open Satellite Imagery and Geoportals | MapBox Satellite

Open Satellite Imagery and Geoportals | MapBox Satellite

January 2012 GeoDC presentation the open satellite imagery available powering MapBox Satellite, and reflections on the acquisition process.

Chris Herwig

January 09, 2013
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  1. • Global coverage • 30 meter multispectral resolution • 15

    meter panchromatic resolution • Available from NASA, LEDAPS, USGS EROS Landsat
  2. • Continental U.S. coverage • Resolution: 1-2 meters • Orthorectified

    aerial imagery • Available from USDA Farm Services Agency, state GIS agencies NAIP National Agriculture Imagery Program
  3. HRO • Coverage for 133 Urban Areas in U.S. •

    6 inches to 1 meter resolution • Homeland Security/Disaster risk mitigation uses • Available from USGS EROS, State GIS Agencies High Resolution Orthoimagery
  4. Geoportals • Federal, state, & local government investing in them

    • Endpoints for open geodata access, query, visualization, sometimes download • Most still functionally in beta
  5. 3 Geoportal Users 1. Casual - data discovery 2. Programmatic

    - download sub-section(s) of larger dataset based on another process 3. Bulk - Need entire datasets, varying sizes, all at once Read more: http://mapbox.com/blog/trouble-with-geoportals/
  6. Best Geoportals 1. FTP-like access to raw data for bulk

    users 2. APIs and developer documentation for programmatic users 3. Visual/spatial queries and processed data options for casual users
  7. Utah Automated Geographic Reference Center • Casual: AGRC Raster Data

    Discovery 1 • Programmatic: Developer Documentation and Utah SGID Image Server • Bulk: anonymous FTP access to data, advertised throughout site. http://agrc.utah.gov/
  8. Room for Improvement • Spatial query/interface not best for all

    • Number of steps between discovery & download • Data size and technical limitations • Websites go down. Use InternetArchive’s WayBackMachine
  9. International • U.S. Government’s commitment to open aerial and satellite

    imagery is remarkable. • Few other countries have as much imagery available, fewer with the favorable open licensing • Brazil, Finland, and New Zealand are leaders
  10. Open data is good. We should be talking about data

    accessibility more, both domestically and internationally.
  11. MapBox Satellite • Access with basic-level MapBox account or higher

    • Global satellite imagery, zoom 0-12 • U.S. aerial imagery zoom 13-17 • Sourced from all open, public domain data Phase 1 Read more: http://mapbox.com/blog/mapbox-satellite/
  12. MapBox Satellite • MapBox partnering with Digital Globe to radically

    extend coverage • Q1 2013 - 30 cm aerial imagery for US + Europe ( Zoom 18) • First half of 2013, zoom 17 globally Phase 2+
  13. Resources • USDA Data Gateway: http://datagateway.nrcs.usda.gov/ • NASA LPDAAC: https://lpdaac.usgs.gov/

    • National States Geographic Information Council State Clearinghouses: http://www.nsgic.org/clearinghouse-nodes • USGS EROS: http://eros.usgs.gov/ • USGS EarthExplorer: http://earthexplorer.usgs.gov/ • USGS The National Map: http://nationalmap.gov