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 lowest resolution data is the dted level 0, with a grid spacing of 30 arcseconds, or about 1 kilometer. 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. The national geospatialintelligence agency nga does not sell or perform services for the public. 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 1 kilometer data and some higherresolution data is available online, as are product specifications and documentation. Click on the image at the required latlon and wait for the next page to be displayed, centered on these coordinates.
A data file of dted level 0 is produced from dted level 1 or vmap 0. September 2008 edited september 2008 in elevation data. Dted level 0 was derived from nga dted level 1 to support a federal. The digital elevation models dem derived from the srtmxsar data are provided in the dtedformat. 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. Hi, does anyone know if i can buy a cd or dvd of level 0 dted data for the whole world.
Dted level 0 corresponds to small scale hardcopy products, and has a post spacing of 30 arcseconds, or one kilometer nominal resolution. Radio mobile rf propagation simulation software dted. Srtm dted is a uniform matrix of elevation values indexed to specific points on the ground. There are three levels of the dted tiling scheme available. Digital terrain elevation data dted map and data library. In the end, i managed to add dted layer using rasterlayer.
To the best of our knowledge, no dted level 3 or higher has been produced in the nga dted format. Next ill zoom all the way in on the highest elevation values and switch to a 10ft contour interval. Level 0 has a post spacing of approximately 900 meters. Dted level 0 is produced with only full onedegree cells with no voids. The stf contains geotypical open terrain, consisting of pseudo dted level 1 terrain data and pseudo vmap level 1 feature data. Dted level 2 30m will be available thru the 2000 sts99 shuttle ifsar mission in 2001. The files have file names with the extension dtn, where n is the level of the dted product. Dted level 0 elevation post spacing is 30 arc second nominally one kilometer. A file format like dt0 dted level 0 file is a standard way that information is encoded for storage in a computer file. Those products and services that are available to the public can be obtained from the following sources.
Citeseerx digital terrain model interpolation for mobile. Vmap level 1 contains medium resolution data at the 1. Use the free 21day full working demo to process the file at your location. 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. Both polygonal and gridded data sets are provided in the download. Nga products can be downloaded using the geoint delivery platform. Digital terrain model interpolation for mobile devices. It consists of geographic, attribute, and textual data stored on cdroms. Fme is the data integration platform with the best support for spatial. Military specification digital terrain elevation data dted milprf89020b, and amongst other parameters describes the resolution for each level. File formats may be either proprietary or free and may be either unpublished or open. I remember about 78 years ago that data was still obtainable but it doesnt appear as though it is. Nov 30, 2011 this new elevation data called global multiresolution terrain elevation data 2010 gmted2010, replaces the thirty year old gtopo30 terrain model.
Level 0 covers only about 50% of the area covered by gtopo30, but much of the difference is in antarctica. Converts digital terrain elevation data from one level to another. Dted level 0 corresponds to small scale hardcopy products, and has a post spacing. 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. 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. This edition includes the shuttle radar topography mission \srtm\ dted level 1 and level 2 requirements. Vmap level 0 is the low resolution component of the vmap family of products. You can see how the dted 1 grid misses the very highest terrain. Level 1 has a post spacing of approximately 90 meters. 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.
Because during my tests, i found that the elevation of the resulting dted 0 cell rather corresponded to an average of dted 2 cells. 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. Jan 20, 2020 the dted format for level 0, 1 and 2 is described in u. It is unclear what file sizes will be used for that data. Exporting dted level 2 to dted level 0 global mapper forum. Dted file extension the low cost mapworks surfaces addon running inside civil3d will read nga digital terrain elev data level 02. The dted format was developed for the distribution of gridded elevation data that was assembled by the us defense mapping agency dma.
Go to the raster exporter section at the bottom of the page. National geospatial intelligence agency nga of the u. 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. Because during my tests, i found that the elevation of the resulting dted 0 cell rather corresponded to an.
The dted format for level 0, 1 and 2 is described in u. For information on locating map data for download over the internet, see the. Im kind of in an odd situation and need dted level 0 data but it looks like the nga raster roam site is down. The edges of adjacent tiles have redundant records. Digital terrain elevation data national geospatial. Level 1 data are spaced at 3 arcseconds approximately 90m and level 2 data are spaced at. Dted level 2 is a uniform gridded matrix of terrain elevation. I know i can download it, but you can only download small bits at a time. Shuttle radar topography mission dted level 1 3arc second data dted1. You can find published specifications for dted at the nga website. Islands with an axis greater than 600 meters for dted level 1 or 300 meters for dted level 2 must appear in dted. 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. 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. Maps extend a half a cell outside the requested map limits.
This is the best resolution dted map level that the app can use, with a nominal 30 meter cell spacing. Dted files digital terrain elevation data what it is. File open dt0 dted level 0 file data conversion ai. Choose import dem dted level 0, 1 or 2 from the file menu and then. Dted files come in different levels depending on the resolution of the 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. 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. If you want the format specification, you should edit the question to state this. And this is level 2 this time with the dted grid displayed. The dt0 dted level 0 file format specifies how bits are used to encode information in a digital storage medium. 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.
Add dted data to a map layer geonet, the esri community. This new elevation data called global multiresolution terrain elevation data 2010 gmted2010, replaces the thirty year old gtopo30 terrain model. Smaller islands with a vertical relief of at least 15 meters must also be included. Level 0 has a post spacing of 30 arc seconds in latitude direction ca. Dted supports negative as well as positive elevations so it works in death valley. 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. Raster to dteddata management toolbox documentation. Currently only converts dted1dted2 no longer in development due to personal time constraints. I know i can download it, but you can only download small bits at a. 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. Dted was used as the source for most of eurasia and large parts of africa and the americas. 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.
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. Level 0 files contain elevation data spaced at 30 arcsecond intervals approximately 1km. Gmted2010 is a suite of seven raster data products. 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 lowest resolution data is the dted level 0, with a grid spacing of 30. Dted level 0 and dted level 1 files are in the same format albeit at different post spacings, as published in the milprf89020b document. The maximum dted 1 elevation is 3333 ft and the maximum dted 2 elevation is 3360 ft. Dted level 1 corresponds to medium scale hardcopy products, and has a post spacing of three arcseconds, or 100 meter nominal resolution. Splits a raster dataset into separate files based on the dted tiling structure. Dted level 0 data provides approximately 1km resolution of elevation data which requires smaller storage space.826 965 1652 735 1652 1290 841 795 627 1576 1141 178 328 735 1390 1210 311 221 605 261 425 384 470 756 92 969 1008 585 1571 345 1034 975 516 1548 521 982 125 1454 13 43 1193 1118 163 337 164 1389 438 1401 1069 1047