Coastal Flooding Exercise

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This week's task was to determine the impact that Hurricane Sandy had on Mantoloking, NJ. I was given LAS datasets from before the storm and after. Both were first converted into TINs and then into Rasters. I then used the Raster Calculator to subtract the two rasters and obtain a new raster to demonstrate the changes caused by Sandy. 


Another task was to compare the storm surge results from a USGS and LiDAR DEM in Florida. To begin, I had to convert the units of the LiDAR DEM from feet to meters, for which I used the Times tool. After this, I created a raster for each DEM that only included an elevation of 1 meter or less. Next, I used the Region Group tool to remove the isolated low lying areas. These rasters were then converted to polygons. To determine which buildings were impacted I conducted a Spatial join on both rasters with the buildings polygon. From there I was able to use the Select Layer by Attribute tool to count and display which buildings and which types of buildings were impacted by the 1 meter storm surge. 





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