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.

Transcript

1. Chris Herwig @hrwgc
2. Roadmap 1. Open imagery 2. Geoportals 3. Successes/Need for Improvements 4. U.S. vs. the World 5. MapBox Satellite
3. • Global coverage • 30 meter multispectral resolution • 15 meter panchromatic resolution • Available from NASA, LEDAPS, USGS EROS Landsat
4. South Korea
5. • 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
6. Brawley, California
7. 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
8. Los Angeles, CA
9. USGS HRO | San Francisco 0.3 meter resolution
10. Geoportals • Federal, state, & local government investing in them • Endpoints for open geodata access, query, visualization, sometimes download • Most still functionally in beta
11. 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/
12. 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
13. 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/
14. 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
15. 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
16. Open data is good. We should be talking about data accessibility more, both domestically and internationally.
17. 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/
18. Kuala Lumpur, Malaysia
19. Stamford, Connecticut NAIP Imagery
20. 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+
21. Chris Herwig chris@mapbox.com @hrwgc
22. Coastal China Landsat
23. Canada
24. 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