Geographic Information Systems

A Rainbow From Above

So I learned that LiDAR is similar to RADAR in that it uses different wavelengths of the electromagnetic spectrum to map out the landscape of a desired area. RADAR stands for Radio Detection and Ranging, and LiDAR stands for Light Detection and Ranging. Where RADAR uses radio waves, a long, low energy wavelength to do imaging over wider areas, LiDAR uses infrared light waves, which are shorter and higher in energy to get more detailed but smaller area images. This allows for a lot of really intricate mapping methods, like areas of the Amazon that aren’t reachable in land, and have even discovered ruins of past civilizations!

For today, though, I decided to look at my school, Drew University. Okay, admittedly I tried to look at Columcille again, but I couldn’t get the USGS site to download the data for me, so… May I present Drew University in all of its technicolor glory?

Aren’t they purrrdddyyyy?

For this presentation, I decided to look at the Aspect view and the Elevation view with some modifications to color for a cool spread. The aspect shows the orientation of the slope of the land or landmark mapped, and the elevation is just the distance above sea level of the land. It was cool to put these two side by side to see all the ways that we as humans have changed the surface of the land, but also how we’ve adapted to it’s natural shape in some ways.

This post meets the requirements of Assignment 5 for Spring 2021 ESS302 at Drew University.

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