GIS4035: Module 4 - Ground Truthing and Accuracy Assessment

This week's assignment built upon last week's. The Land Use Land Cover assessment that was compiled in Module 3 was assessed in this module. Since actual fieldwork is impracticable for an online course, Google Street Map was the next best thing. Thirty random points were generated in the study area, weighted by land classification so that each class used in the classification received at least one point and proportionally more points were assigned to classes with larger coverage areas. Each point was then located in google maps and the accuracy of the classification at that point itself was assessed and recorded. The map below was then compiled, showing the accuracy result for each point.

The accuracy calculated as a ratio of accurate point classifications to the total number of points assessed is 63.3%.

Accuracy Assessment for Pascagoula, MS Land Use / Land Cover Map