The 1/8th-degree resolution topographic datasets and illustrations featured below are based on the GTOPO30 Global 30 Arc Second (~1-km) Elevation Dataset. In particular, average elevation values over the NLDAS domain were arrived at by isolating the relevant subset of data from the ~1-km global dataset, and then averaging up to the 1/8th-degree NLDAS resolution. Slope and aspect values were then derived from this 1/8th-degree data. Maximum, minimum and standard deviation values, by contrast, were calculated directly from the ~1-km values which lie within each 1/8th-degree NLDAS grid box. Raw datasets were supplied by Steve Graham, Department of Geological Sciences, University of Texas at Austin.
|Column 1||Grid Column Number|
|Column 2||Grid Row Number|
|Column 3||Latitude (center of 1/8th-degree grid boxes)|
|Column 4||Longitude (center of 1/8th-degree grid boxes)|
|Column 5||Data Value|