WETMAAP Skill 1
Crescent Lake: Element 5
Skill 1: Map Use
Element 5: Use of Satellite Image
Materials:
1994 Satellite TM Image
1988 Aerial Photograph
Magnifying glass
1:250,000 scale USGS map
1:100,000 scale USGS map
1:24,000 scale USGS map
Exercises:
1. The 1988 Aerial Photograph is a Color Infrared (CIR) Image.
What does "Color Infrared" mean?
2. Locate Crescent Lake on the TM Image.
3. Locate Goose Lake on the TM Image.
4. Why do Island Lake and Goose Lake have a different color than Crescent Lake and Gimlet Lake on the TM Image?
5. Compare the TM Image to the Color Infrared Aerial Photograph (CIRAP)
(Circle appropriate choice)
| Which covers more area? | TM |
CIRAP |
| Which has the best resolution (sharpest features) | TM |
CIRAP |
| Wetlands show up the best? | TM |
CIRAP |
| Water shows up the best? | TM |
CIRAP |
| Is there a difference in vegetation appearance between the two? | YES |
NO |
6. What is the scale of the Satellite TM Image? (Refer to Skill 2, Element 2: Determining Scale)
Scale:
7. Lay the 1992 Satellite TM Image, 1988 Aerial Photograph, 1:250,000 scale USGS map, 1:100,000 scale USGS map, and the 1:24,000 scale USGS map out in front of you in order of scale--smallest scale on the left to largest scale on the right.
8. Which of these maps or images:
Covers the largest area
Cover the smallest area
Provides the most detail for topography
Provides the least detail for topography
Provides the most detail about Land Use/Land Cover
Provides the least detail about Land Use/Land Cover
9. Does the 1:100,000 scale map or the Satellite Image provide the best information about:
Hydrology
Land Use/Land Cover
Topography