A file format like dt0 dted level 0 file is a standard way that information is encoded for storage in a computer file. I remember about 78 years ago that data was still obtainable but it doesnt appear as though it is. The edges of adjacent tiles have redundant records. Smaller islands with a vertical relief of at least 15 meters must also be included.
Converts digital terrain elevation data from one level to another. Nasa has released version 2 of the shuttle radar topography mission digital topographic data also known as the finished version. 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. The dt0 dted level 0 file format specifies how bits are used to encode information in a digital storage medium. 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 digital elevation models dem derived from the srtmxsar data. Dted level 2 is a uniform gridded matrix of terrain elevation. Radio mobile rf propagation simulation software dted. Some code to load and process digital terrain elevation data dted files. 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.
Falconview doesnt support dted 0 so this is only a curiosity. 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. Jan 20, 2020 the dted format for level 0, 1 and 2 is described in u. The gmted2010 product suite contains seven new raster elevation products for each of the 30, 15, and 7. The lowest resolution data is the dted level 0, with a grid spacing of 30. Military specification digital terrain elevation data dted milprf89020b, and amongst other parameters describes the. They will be automatically used when subsampling elevation data on export like from dted2 to dted0. Digital terrain model interpolation for mobile devices.
The lowest resolution data is the dted level 0, with a grid spacing of 30 arcseconds, or about 1 kilometer. National geospatial intelligence agency nga of the u. Vmap level 1 contains medium resolution data at the 1. You can find published specifications for dted at the nga website. Caution the data will be extraced into a new folder called dted its part of the path stored with each file in the zip so be aware that you may end up with path which ends with dted dted, if this happens make sure the dted path in elevation configuration includes both the names example c.
The 1 kilometer data and some higherresolution data is available online, as are product specifications and documentation. The digital elevation models dem derived from the srtmxsar data are provided in the dtedformat. For information on locating map data for download over the internet, see the. Current dted format does not handle the higher resolution data very well, since the finest resolution that can be implemented is 0.
The points in between the sampled points can be interpolated making use of the interpolation algorithms, with the addition of two sets of extra points whose coordinates are determined according to the existing sample points. Dted 0 is unique because in addition to the normal elevation file there are files containing the average, maximum and minimum elevation for 3 degree by 3 degree boxes centered on each dted post. The dted level 0 data is relatively small, and is often published as a concatenation of large area or global tiles in other than dted format. Dted was used as the source for most of eurasia and large parts of africa and the americas. File open dt0 dted level 0 file data conversion ai. The global multiresolution terrain elevation data 2010 gmted2010 provides a new level of detail in global topographic data. 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 file extension the low cost mapworks surfaces addon running inside civil3d will read nga digital terrain elev data level 02.
The files have file names with the extension dtn, where n is the level of the dted product. Exporting dted level 2 to dted level 0 global mapper forum. In the end, i managed to add dted layer using rasterlayer. Add dted data to a map layer geonet, the esri community. The originating data was dted level 0 downloaded from the nga raster roam page.
Fme is the data integration platform with the best support for spatial. Im kind of in an odd situation and need dted level 0 data but it looks like the nga raster roam site is down. Geospatial repository and data management system grid. It consists of geographic, attribute, and textual data stored on cdroms. The national geospatialintelligence agency nga does not sell or perform services for the public. A data file of dted level 0 is produced from dted level 1 or vmap 0. 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 2 30m will be available thru the 2000 sts99 shuttle ifsar mission in 2001. The shuttle radar topography mission srtm water body data files are a byproduct of the data editing performed by the national geospatialintelligence agency nga to produce the finished srtm digital terrain elevation data level 2 dted 2. Level 0 covers only about 50% of the area covered by gtopo30, but much of the difference is in antarctica. 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. Islands with an axis greater than 600 meters for dted level 1 or 300 meters for dted level 2 must appear in dted.
Currently only converts dted1dted2 no longer in development due to personal time constraints. Citeseerx digital terrain model interpolation for mobile. Global multiresolution terrain elevation data 2010. Dted level 1 corresponds to medium scale hardcopy products, and has a post spacing of three arcseconds, or 100 meter nominal resolution. Shuttle radar topography mission dted level 1 3arc. This edition includes the shuttle radar topography mission \srtm\ dted level 1 and level 2 requirements. 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. This is the best resolution dted map level that the app can use, with a nominal 30 meter cell spacing. There are three levels of the dted tiling scheme available. 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. Digital terrain elevation data national geospatial. Military specification digital terrain elevation data dted milprf89020b, and amongst other parameters describes the resolution for each level.
Those products and services that are available to the public can be obtained from the following sources. The horizontal datum is the world geodetic system 1984 wgs84 and the vertical datum is mean sea level as determined. Dted level 0 was derived from nga dted level 1 to support a federal. Use the free 21day full working demo to process the file at your location. Dted level 0 corresponds to small scale hardcopy products, and has a post spacing of 30 arcseconds, or one kilometer nominal resolution. 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. Simply download that file and extract the contents into your existing v12. Dted file extension the low cost mapworks surfaces addon running inside civil3d will read nga digital terrain elev data level 0 2. Each dted file contains elevation data for a 1 degree. Dted level 0 corresponds to small scale hardcopy products, and has a post spacing of 30.
Access constraints srtm dted level 1 3 arc second data for global coverage is distributed. Raster to dteddata management toolbox documentation. File formats may be either proprietary or free and may be either unpublished or open. 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. Dted level 0 data provides approximately 1km resolution of elevation data which requires smaller storage space. It provides basic quantitative data for all military systems that require terrain elevation, slope, and gross surface roughness information. The dted format is intended to be used with one band data that represents elevation, so this tool cannot be used for multiband images. United states mapping agencies provide terrain elevation data in the form of data grids. Caution the data will be extraced into a new folder called dted its part of the path stored with each file in the zip so be aware that you may end up with path which ends with dteddted, if this happens make sure the dted path in elevation configuration includes both the names example c. 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. Maps extend a half a cell outside the requested map limits. Dted supports negative as well as positive elevations so it works in death valley. Digital terrain elevation data dted map and data library.
The maxminavg values are calculated using dted 1 data. The output pixel size is dictated by the dted level, and the data is converted and stored as signed, 16bit integers. Dted level 0 elevation post spacing is 30 arc second nominally one kilometer. Level 1 has a post spacing of approximately 90 meters. Used in study to find large flat areas of world as possible places to locate gammaray telescope array. Vmap level 0 is the low resolution component of the vmap family of products. Dted level 0 is produced with only full onedegree cells with no voids. The dted format for level 0, 1 and 2 is described in u. Dted is a standard of digital datasets which consists of a matrix of terrain elevation values, i. The input can only be a single band raster dataset. 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 data is available at three different resolutions, which are referred to as level 0, level 1 and level 2.
Shuttle radar topography mission dted level 1 3arc second. Level 0 has a post spacing of 30 arc seconds in latitude direction ca. Level 0 has a post spacing of approximately 900 meters. Version 2 is the result of a substantial editing effort by the national geospatialintelligence agency and exhibits welldefined water bodies and coastlines and the absence of spikes and wells singlepixel.
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