Data Searching and Downloading

2 EarthExplorer (EE) Step 1: Registration  Username/password/Secret Question  Affiliation and Primary Data Use Information  Address – Contact and Shipping  Registration Confirmation

3 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 range can specify months if want certain time of year (dry season, wet season, etc.)

4 EarthExplorer (EE) (cont.) Step 3: Select Landsat archive under ‘Data Sets’ tab specify which sensor (Landsat 4,5,7, 8 etc.)

5 EarthExplorer (EE) (cont.) Step 4: Under ‘Additional Criteria’ you can specify the degree of cloud cover that is acceptable

6 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.)

7 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  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  RUE RUE  The map pops out separately – very useful with dual monitors and other open windows

9 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