Table of Contents
MN GIS/LIS Consortium
From the Chair
Student Scholarship Competition
Our 50th Issue
LMIC Budget Restored
Parcel Inventory Updated
Monument Coordinates in Feet
GIS for LCCMR
Regional Collaboration Panel
Met Council Map Site
MetroGIS Address Dataset
New Funding for Land Data
GeoMoose Web Mapping
Hennepin Co. Mobile Assessor Tool
Remote Aircraft Photography
Clay Co. Addresses
USGS Maps in GeoPDF
Free Landsat Images
TerraLook Free Imagery
USGS Resources for Teachers
St. Mary's Update
Geography, History Online
ESRI Map Help
Google Earth Pro Grants
Bring Back Geography!
New Parcel Study
MAPPS Loses Lawsuit
TerraLook: Free Satellite Images
Adapted from U.S. Geological Survey TerraLook and NASA JPL websites
Science writers, field scientists, resource managers, educators, students, policy makers, and the general public are all interested in satellite images of the Earth. The TerraLook product expands and broadens the remote sensing user community by providing a user-selectable collection of free satellite images, distributed as simulated natural color JPEG images.
TerraLook images are designed for visual interpretation and display, and are of value to anyone who wants to see the changes to the Earth’s surface over the last 30 years. (The source data, rather than TerraLook images, should be obtained for use in digital analysis.)
The images document the changes near the confluence of the Iguazú and Paraná Rivers, which separate Argentina, Brazil and Paraguay
A TerraLook collection consists of georegistered Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images and the Tri-Decadal Global Landsat Orthorectified images from three epochs (circa 1975, 1990, and 2000), selected from satellite images archived at U.S. Geological Survey Center for Earth Resources Observation and Science (EROS).
- ASTER: The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument provides fourteen spectral bands with 15- to 90-meter resolutions depending on the band(s). ASTER does not acquire data continuously; its sensors are activated only to collect specific scenes upon request. For more information about ASTER images, see: http://eros.usgs.gov/products/satellite/aster.html
- Landsat: The Tri-Decadal Global Landsat Orthorectified data collection consists of a global set of high-quality, relatively cloud-free orthorectified MSS, TM and ETM+ imagery from Landsats 1-5 and 7. This dataset provides users with access to quality-screened, high-resolution satellite images with global coverage over the Earth's land masses. For more information, see: http://eros.usgs.gov/products/satellite/landsat_ortho.html
TerraLook images can be viewed in any program that can open JPEG images. Examples include web browers, word processors, and graphic software. A free Viewer and Toolkit designed for use with TerraLook Collections can also be downloaded from http://terralook.sourceforge.net/.
For More Information
To learn more about TerraLook collections, see these two websites:
To download TerraLook products, choose from the following options:
- Standard Collections: Many standard collections have been archived and are available for download from http://asterweb.jpl.nasa.gov/TerraLook_download.asp. Typically, these consist of country collections, containing full-country coverage with the historical Landsat images from 1975, 1990, and 2000, plus ASTER coverage of the Protected Areas of the country.
- Custom Selection: Create a custom collection of images by using the USGS Global Visualization Viewer (Glovis) tool at http://glovis.usgs.gov. Select the images to build the collection – you will be notified when the collection is available for download.