Lab 8

In lab 8 we took samples of reflectance from 12 different types of surfaces from a Landsat ETM+ image.

From this image we had to take samples of the following surfaces.

1. Standing Water
2. Moving water
3. Vegetation
4. Riparian vegetation.
5. Crops
6. Urban Grass
7. Dry soil (uncultivated)
8. Moist soil (uncultivated)
9. Rock
10. Asphalt highway
11. Airport runway
12. Concrete surface (Parking lot)

Using the chart below and the knowlegdge of shapes and association, I was able to locate all of the surfaces in the image.

Using Erdas I went to Drawing and drew a small polygon, which is my AOI, in the featured surface. I then went to Raster -> Signature Editor. Then created a new signature. This than gave me a line graph showing the different reflectance in 6 bands. All 12 features are in the line graph below.