The geographic location of the area covered by these DEMs is Lake Tahoe and its surrounding mountains. The data collected from the USGS website had some errors. If you take a look at the lake in the Color Ramped Shaded Relief and Aspect maps, it shows varying “strips” of data across the lake. This is most likely caused by measurements taken at different times or perturbations in the water. Also to note, the DEM maps include parts of both California (Western side) and Nevada (Eastern side). Furthermore, there is a buffer area around the lake that captures most of the high elevation areas. The range of elevation spans from roughly 1400m to 3300m. The extent of this map from West to East is –120.304 to 119.720, and from North to South it is 39.345 to 38.880. Lastly the geographic coordinate system used for these DEMs was the GCS North American 1983.
No comments:
Post a Comment