Dted files come in different levels depending on the resolution of the data. September 2008 edited september 2008 in elevation data. The stf contains geotypical open terrain, consisting of pseudo dted level 1 terrain data and pseudo vmap level 1 feature data. Fme is the data integration platform with the best support for spatial. 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.
Dted supports negative as well as positive elevations so it works in death valley. Radio mobile rf propagation simulation software dted. Digital terrain elevation data dted map and data library. Splits a raster dataset into separate files based on the dted tiling structure. Click on the image at the required latlon and wait for the next page to be displayed, centered on these coordinates. 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 1 corresponds to medium scale hardcopy products, and has a post spacing of three arcseconds, or 100 meter nominal resolution. Exporting dted level 2 to dted level 0 global mapper forum. 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. 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. Choose import dem dted level 0, 1 or 2 from the file menu and then. 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.
Level 0 covers only about 50% of the area covered by gtopo30, but much of the difference is in antarctica. Vmap level 1 contains medium resolution data at the 1. Digital terrain elevation data national geospatial. You can find published specifications for dted at the nga website. Nga products can be downloaded using the geoint delivery platform. Citeseerx digital terrain model interpolation for mobile. Currently only converts dted1dted2 no longer in development due to personal time constraints. This is the best resolution dted map level that the app can use, with a nominal 30 meter cell spacing. During a conversion from dted 2 to dted 0, how can i be sure to keep the highest elevation of a set of dted 2 cells corresponding to a dted 0 cell. The dt0 dted level 0 file format specifies how bits are used to encode information in a digital storage medium. I remember about 78 years ago that data was still obtainable but it doesnt appear as though it is.
Because during my tests, i found that the elevation of the resulting dted 0 cell rather corresponded to an average of dted 2 cells. Level 0 files contain elevation data spaced at 30 arcsecond intervals approximately 1km. A data file of dted level 0 is produced from dted level 1 or vmap 0. Islands with an axis greater than 600 meters for dted level 1 or 300 meters for dted level 2 must appear in dted. Dted file extension the low cost mapworks surfaces addon running inside civil3d will read nga digital terrain elev data level 02. Hi, does anyone know if i can buy a cd or dvd of level 0 dted data for the whole world.
The 1 kilometer data and some higherresolution data is available online, as are product specifications and documentation. Converts digital terrain elevation data from one level to another. Dted level 0 corresponds to small scale hardcopy products, and has a post spacing of 30 arcseconds, or one kilometer nominal resolution. The maximum dted 1 elevation is 3333 ft and the maximum dted 2 elevation is 3360 ft. There are three levels of the dted tiling scheme available. The lowest resolution data is the dted level 0, with a grid spacing of 30. File formats may be either proprietary or free and may be either unpublished or open. Go to the raster exporter section at the bottom of the page. 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 30m will be available thru the 2000 sts99 shuttle ifsar mission in 2001. National geospatial intelligence agency nga of the u. Add dted data to a map layer geonet, the esri community. I know i can download it, but you can only download small bits at a. The dted format was developed for the distribution of gridded elevation data that was assembled by the us defense mapping agency dma. The files have file names with the extension dtn, where n is the level of the dted product. 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. In the end, i managed to add dted layer using rasterlayer. Both polygonal and gridded data sets are provided in the download.
Digital terrain model interpolation for mobile devices. Nov 30, 2011 this new elevation data called global multiresolution terrain elevation data 2010 gmted2010, replaces the thirty year old gtopo30 terrain model. The national geospatialintelligence agency nga does not sell or perform services for the public. 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. 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. Shuttle radar topography mission dted level 1 3arc second data dted1. The digital elevation models dem derived from the srtmxsar data are provided in the dtedformat. To the best of our knowledge, no dted level 3 or higher has been produced in the nga dted format. Use the free 21day full working demo to process the file at your location. A file format like dt0 dted level 0 file is a standard way that information is encoded for storage in a computer file. Dted level 0 is produced with only full onedegree cells with no voids. Jan 20, 2020 the dted format for level 0, 1 and 2 is described in u.
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 level 0 data provides approximately 1km resolution of elevation data which requires smaller storage space. Vmap level 0 is the low resolution component of the vmap family of products. 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 level 2 is a uniform gridded matrix of terrain elevation. Level 1 data are spaced at 3 arcseconds approximately 90m and level 2 data are spaced at. 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.
Dted level 0 elevation post spacing is 30 arc second nominally one kilometer. Dted files digital terrain elevation data what it is. 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. 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 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. 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 0 was derived from nga dted level 1 to support a federal. It consists of geographic, attribute, and textual data stored on cdroms. This edition includes the shuttle radar topography mission \srtm\ dted level 1 and level 2 requirements. Dted is the milspec and the data in that format published by nga. And this is level 2 this time with the dted grid displayed. The edges of adjacent tiles have redundant records.
Because during my tests, i found that the elevation of the resulting dted 0 cell rather corresponded to an. 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. You can see how the dted 1 grid misses the very highest terrain. The lowest resolution data is the dted level 0, with a grid spacing of 30 arcseconds, or about 1 kilometer. Gmted2010 is a suite of seven raster data products. I know i can download it, but you can only download small bits at a time. File open dt0 dted level 0 file data conversion ai. Raster to dteddata management toolbox documentation. Level 0 has a post spacing of 30 arc seconds in latitude direction ca. Next ill zoom all the way in on the highest elevation values and switch to a 10ft contour interval. Dted level 0 corresponds to small scale hardcopy products, and has a post spacing.
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. The input can only be a single band raster dataset. If you want the format specification, you should edit the question to state this. 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. 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. Maps extend a half a cell outside the requested map limits. Dted was used as the source for most of eurasia and large parts of africa and the americas. Level 1 has a post spacing of approximately 90 meters. This new elevation data called global multiresolution terrain elevation data 2010 gmted2010, replaces the thirty year old gtopo30 terrain model. For information on locating map data for download over the internet, see the. Some code to load and process digital terrain elevation data dted files.
Level 0 has a post spacing of approximately 900 meters. Dted level 0 and dted level 1 files are in the same format albeit at different post spacings, as published in the milprf89020b document. Smaller islands with a vertical relief of at least 15 meters must also be included. 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. Used in study to find large flat areas of world as possible places to locate gammaray telescope array.
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