Shuttle radar topography mission dted level 1 3arc. A file format like dt0 dted level 0 file is a standard way that information is encoded for storage in a computer file. This is the best resolution dted map level that the app can use, with a nominal 30 meter cell spacing. The dt0 dted level 0 file format specifies how bits are used to encode information in a digital storage medium. Digital terrain model interpolation for mobile devices. Using file import surface with the files of type filter set to dted files allows us to import nima digital terrain elevation data dted data. The lowest resolution data is the dted level 0, with a grid spacing of 30 arcseconds, or about 1 kilometer. Digital terrain elevation data dted map and data library. Hi, does anyone know if i can buy a cd or dvd of level 0 dted data for the whole world.
Military specification digital terrain elevation data dted milprf89020b, and amongst other parameters describes the resolution for each level. If there are features you desperately need, feel free to. Vmap level 1 contains medium resolution data at the 1. Used in study to find large flat areas of world as possible places to locate gammaray telescope array. Merge dem files togetherresample and crop demsdisplay dems in shaded relief, with. Fme is the data integration platform with the best support for spatial. In support of military applications, the national imagery and mapping agency nima has developed standard digital datasets digital terrain elevation data dted which is a uniform matrix of terrain elevation values which provides basic quantitative data for systems and applications that require terrain elevation, slope, andor surface roughness information. Scope basis of this document is the performance specification digital terrain elevation data dted dma, 1996 provided by the national imaging and mapping agency nima. Dted was used as the source for most of eurasia and large parts of africa and the americas. Dt2 files also contain terrain data at increasing resolution.
National geospatial intelligence agency nga of the u. Raster to dteddata management toolbox documentation. When you open the web page you will see a map of the world with many options. Radio mobile rf propagation simulation software dted. Level 1 data is at a resolution of three arc seconds, or approximately 100 meters. File open dt0 dted level 0 file data conversion ai. Dted level 2 is the basic high resolution elevation data source for all military activities and systems that require landform, slope, elevation, andor terrain roughness in a digital format. In the end, i managed to add dted layer using rasterlayer. Dted level 0 data is published in 30 arc second resolution for free public download. It is unclear what file sizes will be used for that data.
Each tiles extent is one degree in each direction, plus a half pixel on each edge so adjacent tiles have one column and row of overlap. During dted level 0 data sampling from dted level 1 data, the maximum and m inimum elevation value s of the points in the cell are recorded with the average. It provides basic quantitative data for all military systems that require terrain elevation, slope, and gross surface roughness information. Level 0 files have the lowest resolution data with grid points spaced at 30 arc seconds, or roughly one kilometer. Level 0 has a post spacing of approximately 900 meters. Go to the raster exporter section at the bottom of the page. Falconview uses these terms in the status bar when youre viewing the dted map. It consists of geographic, attribute, and textual data stored on cdroms. Each dted file contains elevation data for a 1 degree latitude by 1 degree longitude cell. Converts digital terrain elevation data from one level to another. Currently only converts dted1dted2 no longer in development due to personal time constraints. A data file of dted level 0 is produced from dted level 1 or vmap 0.
You can find published specifications for dted at the nga website. Sourceforge provides the worlds largest selection of open source software. Dted data is available at three different resolutions, which are referred to as level 0, level 1 and level 2. Digital terrain elevation data dted is a digital elevation model dem standard developed by the national imagery and mapping agency nima to support aircraft radar simulation and prediction. Dted level 2 is a uniform gridded matrix of terrain elevation. I remember about 78 years ago that data was still obtainable but it doesnt appear as though it is. Dted file extension the low cost mapworks surfaces addon running inside civil3d will read nga digital terrain elev data level 02. Dted level 0 dted is a uniform matrix of terrain elevation values. The dma later changed its name to national imagery and mapping agency nima but is now called the national geospatial intelligence agency nga. Dted files arent compressed so a file of empty ocean is just as large as one in the middle of one in the rocky mountains. Dted level 2 30m will be available thru the 2000 sts99 shuttle ifsar mission in 2001. Some code to load and process digital terrain elevation data dted files. Dted level 0, a new nima data base, is the result of a joint globedma initiative, which resulted in the joint design and dma production just before dma was reorganized into nima of dted level 0. The digital elevation models dem derived from the srtmxsar data.
The stf contains geotypical open terrain, consisting of pseudo dted level 1 terrain data and pseudo vmap level 1 feature data. Add dted data to a map layer geonet, the esri community. Level 0 files have the lowest terrain granularity, and level 2 files have the highest terrain granularity. Level 0 has a post spacing of 30 arc seconds in latitude direction ca. Vmap level 0 is the low resolution component of the vmap family of products. Dted files come in different levels depending on the resolution of the data.
The edges of adjacent tiles have redundant records. Use the free 21day full working demo to process the file at your location. Level 0 files contain elevation data spaced at 30 arcsecond intervals approximately 1km. Dted level 0 corresponds to small scale hardcopy products, and has a post spacing of 30 arcseconds, or one kilometer nominal resolution. Im kind of in an odd situation and need dted level 0 data but it looks like the nga raster roam site is down. Dted is the milspec and the data in that format published by nga. This is a nima military format for terrain elevation. The files have file names with the extension dtn, where n is the level of the dted product. Splits a raster dataset into separate files based on the dted tiling structure.
Level 1 data are spaced at 3 arcseconds approximately 90m and level 2 data are spaced at 1 arcsecond approximately 30m intervals. Because of the greater density, a dted 1 file is 100 times the size of a dted 0 file and a dted 2 file is 9 times the size of a dted 1 file. When you select this, your profile will be assembled. Those products and services that are available to the public can be obtained from the following sources. If you want the format specification, you should edit the question to state this. The dted level 0 accuracy record is copied from the dted level 1 accuracy record or will contain na not available when produced from vmap 0.
The input can only be a single band raster dataset. Choose import dem dted level 0, 1 or 2 from the file menu and then select the file, which will usually have the filename extension. The 1 kilometer data and some higherresolution data is available online, as are product specifications and documentation. Shuttle radar topography mission dted level 1 3arc second data dted1 the shuttle radar topography mission srtm successfully collected interferometric synthetic aperture radar ifsar data over 80 percent of the landmass of the earth between 60 degrees north and 56 degrees south latitudes in february 2000. Macdem is an application to view and edit digital elevation model dem files. There are three levels of the dted tiling scheme available. Maps extend a half a cell outside the requested map limits. The horizontal datum is the world geodetic system 1984 wgs84 and the vertical datum is mean sea level as determined. Digital elevation modeling and mapping digital elevation model. Level 1 has a post spacing of approximately 90 meters. Dted files digital terrain elevation data what it is. The dted format for level 0, 1 and 2 is described in u.