ASTER


Spatial Analysis

Figure 1: End-member classification of a three-component system, with soil (yellow), water (blue) and vegetation (green) identified. Image credit: University of Maryland, http://glcf.umd.edu/data/coastal/mixture.shtml

ASTER and the Spectral Recipe for Finding Gold

In the last section of this series, we took a look at both the ASTER sensor and the vast library of spectral profiles built as a standard reference for multi-spectral analysis and material classification. In this article, we will take a look at land cover investigations through spectral unmixing, which is […]

GIS Data

The spectral response of three material classes (vegetation, soil and water) overlain on a single graph. (Graph Credit: Penn State University) https://www.e-education.psu.edu/natureofgeoinfo/c8_p5.html

The ASTER Spectral Library – a True Monument of Remote Sensing Data

In the first part of this series, Cameron Windham from Apollo Mapping takes a look at the nuts and bolts of the widely-used ASTER Spectral Library.

GIS Data

Updated 3D Global Topo Data from NASA

Updated 3D Global Topo Data from NASA

Based on measurements from NASA’s Terra spacecraft, a new 3D topographic map has been released as a joint effort by NASA and Japan.  The digital elevation model (DEM) was developed from imagery obtained from the Japanese Advanced Spaceborne Thermal Emission and Reflection Radiometer, or ASTER, instrument aboard Terra.  ASTER is one of five […]