GIS 4035 - Module 5b - Intro to Erdas and Digital Data 2

This week we continue module 5 with part b, and continue working with Erdas. For this weeks project we looked at a total of ten .img files and one .shp file in Erdas to analyze properties and characteristics that distinguish areas of the same imagery. The first step in any properties analyzation is to always first review the metadata, and that is precisely what I did. In reviewing metadata, that is unique in Erdas, one can view valuable data about an image that can let one determine the following but not limited to: spatial resolution, radiometric resolution, bit type, pixel size min/max, image dimensions, and projection info. For the final exercise of module 5b we were supplied an .img file soils_95 and a shapefile hydro_00. We were asked to create an area column and a percent column in the soils_95 attribute table in order to select for characteristics. The attached screenshot is a preview of a map in Erdas showing soil layers that contain humus and fine grain particles. This weeks lab concluded the introduction to Erdas and I'm sure that I will find it to be a valuable tool in future GIS projects.

GIS 4035 - Module 5a - Intro to Erdas Imagine and Digital Data

Module 5a Intro to Erdas Imagine and Digital Data had us start off by giving a tutorial into the program Erdas Imagine. This program is designed to process imagery and in this weeks lab I used Erdas to perform another ground truthing / accuracy assessment for a new area.

The region is located in the pacific northwest of the United States and is ~24 square miles in area.
Utilizing Erdas I was able to manipulate the color bands into a RGB 5,4,3 combination to present the following color scheme. I then imported the selected subset .img into ArcGIS pro to assemble the attached map. This ground truthing / accuracy assessment map highlights various features represented in the legend across the diverse landscape of the satellite imagery.