Posts

Showing posts from December, 2017

Lab 8 Spectral Signature analysis and Resource Monitoring

Image
Lab 8 Spectral Signature analysis and Resource Monitoring Goal The main goal of this lab is to interpret spectral reflectance of various Earth surfaces and near the earths surface from satellite images, and to perform monitoring of surface features. In this lab we will collect spectral signatures from remotely sensed images, and create maps showing Different spectral signatures. Methods Part 1: Spectral Signature Analysis First spectral signatures were gathered by finding areas in the image that contained a surface feature we were looking for, and an area of interest was put in the area, and the spectral signature was recorded. This was done for 12 features some of them being Crops, Dry and Wet soil, standing water, moving water, and some more. Part 2: Resource Monitoring Section 1: Vegetation and Health Monitoring IN this section of part 2 vegetation was the focus, and a NDVI or normalized difference vegetation index was produced for Eau Claire and Chippewa Counties. This in...

Lab 7: Photogrammetry

Image
Lab 7: Photogrammetry Goal and Background The main goal of this lab is to develop skills in photogrammetric tasks on aerial photos and satellite images. Specifically the goal is to understand the mathematics behind calculating photographic scales, measuring areas and perimeters of features, and calculating relief displacement. In addition the lab is intended to introduce stereoscopy and performing orthorectification on satellite images. After the completion of this lab we will have the ability to perform diverse photogrammetric tasks. There are three parts to this lab: part 1-scales, measurements and relief displacement, part 2-stereoscopy, and part 3- orthorectification. Part 1, Section 1: Calculating scale of nearly vertical aerial photographs. Part 1, section 2: Measuring areas of features on a photograph. Part 1, section 3: Calculating relief displacement from object height. Part 2, Section 1: Created an anaglyph image with the use of a Digital Elevation Model (DEM). ...