GIS 5100 - Coastal Flooding

During this week's module, module 4, we learned about Coastal Flooding, which can take place at various speeds, including rapidly via surge or slowly via sea level rise. This week we were tasked with performing analysis on the New Jersey shoreline and the coast of Collier County in Florida. In New Jersey we used LiDAR data to evaluate change post hurricane Sandy. This analysis included observing the raw LiDAR data, followed by the creation of Digital Elevation Models (DEMs) of pre and post hurricane Sandy for comparison. A more recent building vector file was also used to assist in the assessment of change, although using more recent data should be used with caution as it does not always accurately depict change as a result of a disaster event. This is particularly true as more time passes. The following map displays elevation change on the New Jersey Shoreline. 

Map depicting elevation change post hurricane Sandy. 

 For Collier County, Florida, we were tasked with determining 1 meter storm surge based on LiDAR data and USGS DEM data. This was done by reclassifying the data based on elevation and then converting the reclassified raster to a polygon. Once the storm surge was determined we then compared the extent of damage to buildings based on storm surge based on both the LiDAR data and the USGS DEM data. The map below displays the results. 

Map depicting one meter storm surge impact on Collier County, Fl. 
based on LiDAR and USGS DEM data. 

The comparative assessment of building damage proved to be slightly challenging as I found the instructions a little difficult to understand. However, once I figured the instructions out I was able to perform the analysis, partially using the technique provided and partially using some techniques I learned previously. 

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