Srtm dted is a uniform matrix of elevation values indexed to specific points on the ground. It is unclear what file sizes will be used for that data. Digital elevation modeling and mapping digital elevation model. This edition includes the shuttle radar topography mission \srtm\ dted level 1 and level 2 requirements. Milprf89020 digital terrain elevation data \dted\ this specification defines the requirements within national imagery and mapping agency\s \nima\ digital terrain elevation data base which supports various weapon and training systems. Dted level 2 corresponds to medium to large scale hardcopy products, and has a post spacing of one arcsecond, or 30 meter nominal resolution. Although no standards exist, the defacto resolution for level 3 dted is a rd arc second 10 meter, level 4 is 19th arc second 3 meter and level 5 dted is 127th arc second 1 meter. Dted level 1 has a resolution of 3 arcseconds, or about 100 meters, increasing. Load into world builderworld engine and have it export as tiled assets for unreal to read. Some code to load and process digital terrain elevation data dted files.
Dted is the milspec and the data in that format published by nga. The 1 kilometer data and some higherresolution data is available online, as are product specifications and documentation. 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. Sea or ocean elevation values for dted level 1 or dted level 2 shall be zero. For information on locating map data for download over the internet, see the. This edition includes the shuttle radar topography mission srtm dted level 1 and level 2 requirements. Dted level 1 100m post spacings 1,442,401 data points. The elevation data are with respect to the reflective surface, which may be vegetation, manmade. Digital terrain elevation data national geospatial. There are three levels of the dted tiling scheme available. Shuttle radar topography mission dted level 1 3arc second.
Each dted file contains elevation data for a 1 degree latitude by 1 degree longitude cell. Currently only converts dted1dted2 no longer in development due to personal time constraints. Other higher resolution data called level 1 and level 2 is not available to public but can be used in oziexplorer if you have it by making sure the dted path name ends in a 1 or a 2 example \dted1 depending on the level you are using. In accordance with the dted 2 specification, the terrain elevation data have. When you select this, your profile will be assembled. 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. Raster to dteddata management toolbox documentation. The stf contains geotypical open terrain, consisting of pseudo dted level 1 terrain data and pseudo vmap level 1 feature data. I remember about 78 years ago that data was still obtainable but it doesnt appear as though it is.
Drains with a width equal to or greater than 183 meters shall be visible in the. The defense logistics agency dla aviation division is responsible for the. Dted digital terrain elevation datathis is a format specification with specific aspects about resolution and accuracy of elevation data, defined by the nga national geospatial intelligence agency. In the end, i managed to add dted layer using rasterlayer. English diploma in teacher education first year publication date 2008 topics textbooks. Dted level 1 is a uniform matrix of terrain elevation values with post spacing every 3 arc seconds approximately 100 meters. Dted level 1 corresponds to medium scale hardcopy products, and has a post spacing of three arcseconds, or 100 meter nominal resolution. 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. Level 0 has a post spacing of approximately 900 meters. The digital elevation models dem derived from the srtmxsar data are provided in the dtedformat. When your profile is built, download to a folder on your computer. Choose import dem dted level 0, 1 or 2 from the file menu and then select the file, which will usually have the filename. Usgs eros archive digital elevation shuttle radar topography.
Vertical accuracy of the srtm dted level 1 of crete article in international journal of applied earth observation and geoinformation 71. Vmap level 1 contains medium resolution data at the 1. Converts digital terrain elevation data from one level to another. The dted format data will generally perform adequately. Splits a raster dataset into separate files based on the dted tiling structure. Dted data is available at three different resolutions, which are referred to as level 0, level 1 and level 2.
The national geospatialintelligence agency nga does not sell or perform services for the public. Military specification digital terrain elevation data dted milprf89020b, and. The dma later changed its name to national imagery and mapping agency nima but is now called the national geospatial intelligence agency nga. Vertical accuracy of the srtm dted level 1 of crete request pdf. Maps extend a half a cell outside the requested map limits. Level 1 has a post spacing of approximately 90 meters. Digital terrain elevation data level 1 and derivations in usgs, ed. If you want the format specification, you should edit the question to state this. Level 2 dted files have a minimum resolution of 1 arcsecond near the equator, increasing to 6 arcseconds near the poles. The horizontal datum is the world geodetic system 1984 wgs84 and the vertical datum is mean sea level as determined by the. You can see how the dted 1 grid misses the very highest terrain. Performance specification milc89041 and amendment 1. The horizontal datum is the world geodetic system 1984 wgs84 and the vertical datum is mean sea level as determined by the wgs84 earth gravitational model egm 96 geoid tr8350.
The files have file names with the extension dtn, where n is the level of the dted product. Dted level 1 has a resolution of 3 arcseconds, or about 100 meters, increasing to 18 arcseconds near the poles. Army topographic command usatc, and 3 before september 1968 by the army map service ams, which. The maximum dted 1 elevation is 3333 ft and the maximum dted 2 elevation is 3360 ft.
Software sites tucows software library shareware cdroms software capsules compilation cdrom images zx spectrum doom level cd. Milprf89020b not 1 digital terrain elevation data dted. The input can only be a single band raster dataset. Nga also provides higher resolution terrain data files.
Because of the known limitations and problems with the existing dted specification the higher resolution data is often called highresolution terrain. The dted format for level 0, 1 and 2 is described in u. Im kind of in an odd situation and need dted level 0 data but it looks like the nga raster roam site is down. Jan 20, 2020 the dted format for level 0, 1 and 2 is described in u.
Used in study to find large flat areas of world as possible places to locate gammaray telescope array. Radio mobile rf propagation simulation software dted. 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. Dted level 0 and dted level 1 files are in the same format albeit at different post spacings, as published in the milprf89020b document. Magnetic cdroms which, in addition to the digital terrain elevation data, contain such supplementary data as digital mean elevation data dmed which provides statistical information for the digital file of the elevation data to each 15 x 15 cell, in addition to the names file and the help and methods of use file. Dted level 1 is a uniform matrix of terrain elevation values with post spacing every 3. Shuttle radar topography mission dted level 1 3arc. Srtm dted1 is a uniform matrix of elevation values spaced 3 apart srtm dted, 2004. Dted level 0 downloaded from the nima gateway does not contain null elevations. Geological survey and the national geospatialintelligence agency have released an updated and more accurate global elevation model that pulls data from digital terrain elevation data dted from the shuttle radar topography mission srtm. Dted level 1 has a resolution of 3 arcseconds, or about 100 meters, increasing to 18 arcseconds near. Military specification digital terrain elevation data dted milprf89020b, and amongst other parameters describes the resolution for each level. Shuttle radar topography mission dted level 1 3arc second data dted1. Digital terrain elevation data dted digital terrain elevation data level 0 dted 0 performance specification mild89020a vector product format vpf vector map 0 vmap 0 vector map 1 vmap 1 military standard milstd2407 vpf web site.
Have you found, downloaded or received an ntx file, but dont know which software program is required to open it. Army topographic command usatc, and 3 before september 1968 by the army map service ams. Dted level 1 is the basic medium resolution elevation data source for all military activities and systems that require landform, slope, elevation andor terrain roughness in a digital format. Fme is the data integration platform with the best support for spatial. Vmap level 0 is the low resolution component of the vmap family of products. This is the best resolution dted map level that the app can use, with a nominal 30 meter cell spacing. Dted level 0 is produced with only full onedegree cells with no voids. It consists of geographic, attribute, and textual data stored on cdroms. The horizontal datum is the world geodetic system 1984 wgs84 and the vertical datum is mean sea level as determined by the wgs84 earth gravitational model egm 96 geoid. Level 0 has a post spacing of 30 arc seconds in latitude direction ca.
Primary reference citation for all data from this source primary reference citation for dted level 0 dted is a raster topographic data base provided by nima and its predecessors. Level 1 and 2 are not releasable outside dod unless specifically authorized by the. Digital terrain elevation data dted map and data library. Those products and services that are available to the public can be obtained from the following sources. You can find published specifications for dted at the nga website. Milprf89020b not 1 digital terrain elevation data dted this specification defines the requirements within national imagery and mapping agencys nima digital terrain elevation data base which supports various weapon and training systems.
Although no standards exist, the defacto resolution for level 3 dted is a 1 3rd arc second 10 meter, level 4 is 1 9th arc second 3 meter and level 5 dted is 1 27th arc second 1 meter. Vertical accuracy of the srtm dted level 1 of crete. To the best of our knowledge, no dted level 3 or higher has been produced in the nga dted format. The edges of adjacent tiles have redundant records.
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