RFP for Vermont Orthophotography

The State of Vermont as issued a request for proposals (RFP) for Vermont Statewide Orthophoto Acquisition Services.  Previous orthophotos acquired by the state were panchromatic and acquired by a film-based system (see below).  It will be nice to have true digital, multispectral imagery.

Clipping Raster Data in ERDAS IMAGINE

Clipping a raster dataset using a polygon layer in ERDAS IMAGINE is not rocket science, but knowing the work flow certainly makes things easier if you have never done it before.

Here are the steps:

1. Load your raster dataset into the viewer
2. Load your polygon layer
3. Select the polygon layer and then click on Copy followed by Paste to create an AOI layer
4. Select the AOI layer and run the subset tool with the AOI > Viewer option enabled.

This video provides a quick demonstration of the process.