1. Unsupervised Classification of Higgins Beach and Vicinity Remote Sensing (GEO 205) Author: Stanley Max Final Project Using ERDAS Imagine 8.7 to Conduct an Unsupervised Classification of Higgins Beach and Vicinity

2. Unsupervised Classification of Higgins Beach and Vicinity Why Have I Chosen to Study This Area? Several types of land-cover: Residential Wooded suburban River Marsh Beach Ocean My parcel of land

3. Unsupervised Classification of Higgins Beach and Vicinity 6 km 2 = 600 ha My parcel shown in red

4. Unsupervised Classification of Higgins Beach and Vicinity 6 digital orthophoto quarter quadrangles (DOQQs) from Maine Office of GIS Mosaicked with ERDAS Imagine 8.7 Unsupervised classification 13 classes with 13 iterations; 98% convergence Completed all 13 iterations; 95.6% convergence

5. Unsupervised Classification of Higgins Beach and Vicinity Let us view the classified image.

6. Unsupervised Classification of Higgins Beach and Vicinity Classified image Composed as a map Saved as a TIFF Converted to a JPEG Exported into PowerPoint Poor color fidelity Looks too blue Actual classified image resembles the original closely

7. Unsupervised Classification of Higgins Beach and Vicinity The following pie chart depicts all the classifications I obtained using ERDAS:

8. Unsupervised Classification of Higgins Beach and Vicinity

9. We can see that grass, sand, and water predominate — which makes sense.

10. Unsupervised Classification of Higgins Beach and Vicinity I also ran a supervised classification.

11. Unsupervised Classification of Higgins Beach and Vicinity

12. Let us examine the pie chart depicting the supervised classifications I obtained

13. Unsupervised Classification of Higgins Beach and Vicinity

14. Roof classification predominates! Marsh appears as a separate class.

15. Unsupervised Classification of Higgins Beach and Vicinity What Issues Have We Encountered in the Study? Excellent resolution of DOQQs (approximately 15 cm) makes classification analysis difficult Need non-visible bands Tremendous computer power needed Very slow to run Even negative results have value

16. Unsupervised Classification of Higgins Beach and Vicinity Angus the dog lying on the back porch. The photograph looks East by Southeast. In the immediate background the marsh is visible. Just behind lies the Spurwink River, with Cape Elizabeth in the distance on the left.

17. Unsupervised Classification of Higgins Beach and Vicinity Happy Holidays