Abstract
This study assesses the effects of physical structure and composition of shrub-coppice dune landscapes on anisotropy in the NASA MODIS-ASTER Airborne Simulator (MASTER) solar channels, and investigates the viability of simulating multi-angular data sets using off-nadir airborne imaging radiometry from a single overpass by means of data segmentation. Segmentation data are plant density and cover and spectral measures derived from high-resolution aerial photography and classified Landsat 7 Enhanced Thematic Mapper imagery. The directional signal contributes a variation of 5-10% in reflectance, necessitating angular corrections. For most areas the signal appears to differ only slightly with changes in landscape structure and composition because the view/illumination geometry is poor and reflectance is dominated by bright soils. Further work is required to determine whether simple models would be adequate for angular corrections.
| Original language | English |
|---|---|
| Pages (from-to) | 162-167 |
| Number of pages | 6 |
| Journal | IAHS-AISH Publication |
| Issue number | 267 |
| State | Published - 1 Dec 2001 |
Keywords
- Anisotropy
- Dunes
- Landscape
- Mesquite
- Multiple view angle
- New Mexico
- Structure