Post on 11-Jan-2016
Data Searching and Downloading Data Searching and Downloading
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EarthExplorer (EE)EarthExplorer (EE)
http://earthexplorer.usgs.gov
Step 1: Registration https://earthexplorer.usgs.gov/register/
Username/password/Secret Question Affiliation and Primary Data Use Information Address – Contact and Shipping Registration Confirmation
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EarthExplorer (EE) (cont.)EarthExplorer (EE) (cont.)
Step 1:
Search Criteria tab Set Area of Interest:
path/row look up a place name enter coordinates navigate in the map
Step 2: Select date rangecan specify months if want certain time of year (dry season, wet season, etc.)
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EarthExplorer (EE) (cont.)EarthExplorer (EE) (cont.)
Step 3:
Select Landsat archive under ‘Data Sets’ tab
specify which sensor (Landsat4,5,7, 8 etc.)
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EarthExplorer (EE) (cont.)EarthExplorer (EE) (cont.)
Step 4:
Under ‘Additional Criteria’ you can specify the degree of cloud cover that is acceptable
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Step 5: Review Results Select the image to
view a thumbnail and obtain more information
Or view the footprint by selecting the foot icon
Step 6: Download Select the download
button to add to your cart for download
EarthExplorer (EE) (cont.)EarthExplorer (EE) (cont.)
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Landsat Data Files: What to Get? Landsat Data Files: What to Get? Each Landsat scene has these files available to
download*: LandsatLook “Natural Color” Image (Full resolution .jpg
file) LandsatLook “Thermal” Image (Full resolution .jpg file) LandsatLook “Quality” Image (L8 only, Full
resolution .png file) LandsatLook Images with Geographic Reference (.zip
bundle) at http://landsat.usgs.gov/LandsatLookImages.php
Level 1T GeoTIFF Data Product Individual .TIFF band files, to use in GIS software Geometrically corrected and generally don’t need to be
georectified; should check first though Must be stacked for use in ERDAS New versions of ENVI will read mtl file and assign bands
appropriately; no need to stack
All Landsat data are currently free of charge!!
GloVis GloVis http://glovis.usgs.gov
http://glovis.usgs.gov/?sensor=COMBINED&popout=TRUE
The map pops out separately – very useful with dual monitors and other open windows
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GloVis (cont.)GloVis (cont.)
Browse-based viewer, easy to navigate to see many scenes
Uses USGS Registration credentials (same as EE)
Select Collection Path/Row or Coordinates Use direction arrows to move on map or click
on map Use Prev Scene and Next Scene to ‘page’
through scenes