Transmission tower footprint
Flown by Andrew Westfall, Agriculture & Natural Resources Educator, Purdue Extension - White County
The construction footprint of two newly installed power transmission towers are shown here.
Field drainage tile was damaged during installation, and this orthomosaic map shows water damage. Using software to conduct geospatial analysis, the farmer was able to quantify the damage. 
Here, you can see the result of soil compaction during construction - Orange area = 3.27 acres (too wet, not planted)
- Purple area = 1.52 acres (plant roots too wet)
- Total = 4.79 acres
We followed up during the 2019 growing season to see if compaction was still affecting crops. This was mapped using RGB, VARI, NDVI, and NDRE to compare indices.
NDRE 
NDVI 
RGB 
VARI Structural Examples
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