This module marks the introduction to automated image classification using ERDAS Imagine in tandem with ArcGIS. After exercising the brain with a bit of mental Olympics for calculating EMR properties and an exploratory tour of ERDAS Imagine's eWorkspace, comparisons were made between Landsat Thematic Mapper imagery and Advanced Very High Resolution Radiometer (AVHRR) imagery. The map below was created in ERDAS Imagine by editing the attribute table for the provided imagery to add an area column. A subset of the imagery was created using an Inquire Box along with the Subset and Chip option. Ty discovered that the updated acreages did not transfer into ArcMap with the subset imagery and very graciously posted his solution to the problem for the benefit of the rest of the class. Thanks, Ty! His solution of creating another area column after creating the subset was very helpful. A basic map with the subset image and updated acreages was then created in ArcMap. Acreages were added to the legend through editing descriptions for labels in the symbology dialog box. Ideally a basemap would have been included as well, but eDesktop was not being very cooperative in that department this evening.
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| Land Classification for a Washington State site using ERDAS Imagine and ArcMap. |
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