Raster GIS Lab: Map Algebra

Deliverables, in a single Word document:


Go to the NOAA Coastal Lidar site (link and directions), and get at least 6 lidar data sets for a beach region near your home.

LAS file prep, and grid creation


You will create a number of new grids.  You can save these to reopen later (name them carefully, and remember where you saved them), or just recreate them as needed.

New DEM and Open all the grids.  You need to decide:

New DEM and Open just the best grid.

New DEM.  Close everything, and open just the newest and oldest grids.  If one of those is of particularly low quality, pick the next oldest or youngest.

Open all the DEMs.  Insure that you only have the DEMs open, and not any of the derived grids.  If you were unable to create a reasonable number of grids, you can download grids from Duck, NC, and use them for this part.

You might want to look at this area in Google Earth, or try the WMS map overlays to help with your interpretations.  Export options on the Right click on the map popup menu, which can show the location in Google Earth, or USGS TNM viewer high resolution imagery.


Last revision10/4/2018