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Category Archives: FORT 230
These maps of the study points were made with Landsat images taken from the ESRI Landsat Explorer. The Landsat imagery is considered medium resolution and is designed to show a larger area. Most of the bands are 30 meter resolution. … Continue reading
These two maps compare scenes of the Birch Run area with NAIP 2017 imagery.
These are the sites we will be using to compare different types of imagery for FORT 230 in 2019. And adding the ArcGIS Online version.
Usually hillshades from a DEM are visualized from the northwest. Here I tried it both from 315 degrees (NW) and due south, 180 degrees. The results are very different. The topography of the lake appears inverted with the azimuth of … Continue reading
The top map has an overlay of Landsat 8 imagery from April 13, 2016, which was downloaded from the Landsat Look viewer. It used the percent clip enhancement that eliminates the lightest and darkest areas and modifies the colors. Landsat … Continue reading
This video from Oregon State University is one of the best explanations of how to interpret remotely sensed imagery. It talks mostly about aerial photos, but it applies to other kinds of imagery, too. Following are notes on infrared imagery. … Continue reading
This map shows contour lines generated from the PASDA 3.2 foot DEM. I used the ArcGIS spatial analyst tool to develop contour lines with a vertical elevation of 20 feet and index contours at 100 feet. I also made two … Continue reading