Data Searching and Downloading Data Searching and Downloading

2

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

3

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.)

4

EarthExplorer (EE) (cont.)EarthExplorer (EE) (cont.)

Step 3:

Select Landsat archive under ‘Data Sets’ tab

specify which sensor (Landsat4,5,7, 8 etc.)

5

EarthExplorer (EE) (cont.)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.)EarthExplorer (EE) (cont.)

7

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

9

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