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Digital Terrain Elevation Data (DTEDŽ) Level 0 Files
(http://164.214.2.59/geospatial/products/DTED/dted.html)
Kimberly Maeyama- kimbe_be@yahoo.com
DTEDŽ Level 0 data are a standard dataset originally created by the National Imagery and Mapping Agency (NIMA) for military purposes. Now NIMA has made this data available to the scientific and educational communities. "This DTEDŽ product is a uniform matrix of terrain elevation values which provides basic quantitative data for systems and applications that require terrain elevation, slope, and/or surface roughness information. DTEDŽ Level 0 elevation post spacing is 30 arc second (nominally one kilometer)." More specific information regarding this particular digital data can be found at the above listed URL address.
For the viewing and manipulation of DTEDŽ 0 data, NIMA has made available a free software suite called NIMAMUSE version 2.0 and after a brief registration process can be downloaded at http://164.214.2.59/geospatial/SW_TOOLS/NIMAMUSE/.
Currently, I have tried to work with this software suite, with little to no success. I would be greatly interested in any other member's successes/failures with this particular software suite.
Instead, the TerraBase II freeware software also provided by the U.S. Government
has proven to be the most user-friendly means of working with DTEDŽ Level
0 data. Again, to add to the confusion, the U.S. Government has provided two
simultaneous versions of this particular software, TerraBase
II final version 3.0 and MicroDEM/Terrabase
II version 4.0.
A simpler link for all Terrabase software and related software and data
is via the Terrain Visualization Center.
I have only recently discovered the MicroDEM software version of TerraBase
and have little instructive comment to give regarding differences, improvements
or bugs.
One of only a couple drawbacks to both the DTEDŽ Level 0 and GTOPO30 data is that upon manipulation of data via any of the TerraBase software versions, upon the generation of a contour overlay, the physical coastline is not included.
Therefore, when working with this data it was necessary to obtain a vector overlay of the coastline from the USGS Coastline Extractor website. In order for you to obtain the coastline data for Cyprus, you must be prepared to enter in the parameter latitude/longitude coordinates of the region.
For Cyprus itself, the coordinate parameter is northernmost latitude = 36, westernmost longitude = 32, easternmost longitude = 35 (it is 36 if you wish to add the coastline of northern and southern Levant), southernmost latitude = 34.
Once this is downloaded, it can be opened in TerraBase as an overlay and will therefore detail the coastline of the Island. The graphic above demonstrates MicroDEM/TerraBase version 4.0 software and some of the many available functions. The bottom image of Cyprus represents a combined overlay of contour (250 meter intervals) and the imported coastline data taken from the USGS Coastline Extractor.
GUIDANCE ON WORKING WITH DTEDŽ Level 0 and GTOPO30 FILES
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