Grand Isle State Beach, Louisiana

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Image acquisition by Adam Griffith of the Program for the Study of Developed Shorelines at Western Carolina University.

Flights by Lighthawk http://www.lighthawk.org/

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Cartographer notes

The project returns to a site that has been visited just as many times as any other in the Gulf region. This project had somewhat abundant source data and more than enough ground control from base maps for map processing.

Three separate challenges with this map: - Some color match and image adjustment needed for seamless overlay - The imagery is somewhat sharp and showed low error tolerance when aligning adjacent areas. - There is variance in the viewing angle from the camera, in addition to the normal horizontal movement of the image sensor during vertical aerial photography. This is because the shooting was done free hand, with no fixed camera positioning. In some cases this allowed the photographer to cover a larger extent during the two flight lines. However, each image needed unique adjustment and this increased the amount of time needed to process the map by I am estimating 50% net time. There are other trade offs of not using a clamp that are beneficial to the photography. But this is a note about the unique footprint of each image in the set.

I would like to get some back story and add information on the state beach visitors center construction site within in the map.

-Stewart

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