Impact of Urbanization and Agriculture on the View Shed around Davis: A 12-Year Analysis, Study notes of Environmental Science

Download Impact of Urbanization and Agriculture on the View Shed around Davis: A 12-Year Analysis and more Study notes Environmental Science in PDF only on Docsity! Open Space How Urbanization and Agriculture impact the View Shed around the City of Davis Introduction • The development of land has a dramatic impact on the scenic aspects of the area and greatly affect the feel of the area. Problem • Has the View Shed Around Davis changed over the years? • If it has changed, what has changed and by how much? Images • Acquired Images (glcf.umiacs.umd.edu/index.shtml) – 1998 Landsat TM and 2000 Landsat ETM • Crop images to same size and extent – Smaller images were faster to process Calibration • Empirical Line – A total of 50 points were used when finding the light and dark pixels shared by the 1998 and 2000 images – They were then used to create an Empirical Line image using the 1998 image as a reference Confusion?? • To determine the accuracy of the classified image, a confusion matrix was created. The classification was found to be 84% accurate. • Once the classes were combined to View Shed and Detractor, the class image was found to be 91.89% accurate. Classification • The same classification parameters were then used to create the 2000 class image. • Another confusion matrix was run with all classes and with the combined classes. • Accuracy was found to be 64.34% for all classes, and 82.78% with the combined classes Analysis • Since both images were classified using the same parameters, it was possibly to compute the area for each class and its percentage of the total area. • The images were then compared to determine any changes between them.