1. Exercise #4 - Ground Truth Data Collection: 1. Online resources 2. Field work

2. Ground Truth Jargon term for surface observations. –On-site gathering of data that characterizes surface –Aids in interpretation of imagery Field observations - in situ spectral measurements, aerial photography, descriptive reports, and maps.

3. Most common reasons for conducting field activities are; –select training sites prior to supervised classification –identify key classes after unsupervised classification.

4. If logistics or circumstances limit field operations, then use aerial photography, maps, literature research, etc. In practice, to specify training sites generally means integrating the following sources of information: direct observations, photo documentation, a variety of maps, personal familiarity.

5. Right mouse click on map and choose ‘save picture as’ Latitude 34.1024 Longitude -117.7227 mapslive.com

6. itouchmap.com

7. Go to Terraserver website

10. List of images: Urban Areas 3/29/2004 Aerial Photo 6/1/1994 Topo Map 7/1/1978 Click on info button to get cross hairs

11. Right Click and choose ‘Save image as’

12. Sample Table

13. Sample Pictures

14. GPS apps longitude latitude -117.824478 34.0581 Can send files to yourself

15. GPS apps Nice pics

16. GPS apps Email coordinates plus map Latitude: 34.058244 Longitude: -117.824593 Map url Map url