Web GIS labs

Goal and Background                   In this lab, we learned about spectral signatures of several images of surface features captured by satellite. We analyzed them specifically by working with interpretation and measurement techniques. We also learned how to capture spectral signature and perform analysis on them to determine if the passed our spectral separability tests after graphing them. In the later part of the lab, we learned how to analyze band ratios to determine the health of vegetation.  Methodology I first opened a new Erdas Imagine window and created a lab 5 folder. Then, I opened the image: eau_claire_2000.img image. After doing this, I was instructed to collect spectral signatures from each of the twelve materials and surfaces provided in the lab exercise. To do this, I clicked on the drawing button, polygon , and then drew a shape on each surface I desired. I then clicked on raster , supervised , and...

Jeff Gibbs Remote Sensing Lab 4 blog 5/14/2020 Goal and background:          Over the course of this lab, I was instructed to learn and practice numerous techniques related to image manipulation in remote sensing. Among these skills were subsetting an image, image fusion, working with radiometric enhancement, connecting satellite images to google earth, resampling satellite images, image mosaicking, and graphical modeling.  Methodology: First, to learn about image subsetting, I used an image and shapefile of Eau Claire. I overlaid the image onto the shapefile and saved it as an AOI file. I then clicked Raster, and Subset and Chip to create a subsetted image. Next, I followed steps to perform image fusion between two images: ec_cpw_2000.img and ec_cpw_2000pan.img. I added both images to a new Erdas Imagine. After this, I clicked Raster, Pan sharpen , and Resolution merge. I put in the appropriate settings, saved the new image in my lab 4 fo...