There are three levels of the dted tiling scheme available. Nga products can be downloaded using the geoint delivery platform. For information on locating map data for download over the internet, see the. Dted level 0 is produced with only full onedegree cells with no voids. Dted data is available at three different resolutions, which are referred to as level 0, level 1 and level 2. Islands with an axis greater than 600 meters for dted level 1 or 300 meters for dted level 2 must appear in dted. The input can only be a single band raster dataset. Level 0 has a post spacing of 30 arc seconds in latitude direction ca. 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 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. The typical dted2 file is 25 mb and covers a 1degree area of latitudelongitude, with some distortion inherent in the forcedsquare map projection. Shuttle radar topography mission dted level 1 3arc second data dted1.
Level 2 dted files have a minimum resolution of 1 arcsecond near the equator, increasing to 6 arcseconds near the poles. The dted format for level 0, 1 and 2 is described in u. This new elevation data called global multiresolution terrain elevation data 2010 gmted2010, replaces the thirty year old gtopo30 terrain model. The dma later changed its name to national imagery and mapping agency nima but is now called the national geospatial intelligence agency nga. 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. Dted level 0 downloaded from the nima gateway does not contain. Level 1 has a post spacing of approximately 90 meters.
Dted file extension the low cost mapworks surfaces addon running inside civil3d will read nga digital terrain elev data level 02. Maps extend a half a cell outside the requested map limits. 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. Army topographic command usatc, and 3 before september 1968 by the. Dted supports negative as well as positive elevations so it works in death valley. Dted level 2 corresponds to medium to large scale hardcopy products, and has a. 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. Smaller islands with a vertical relief of at least 15 meters must also be included. Used in study to find large flat areas of world as possible places to locate gammaray telescope array. Level 1 and 2 are not releasable outside dod unless specifically authorized by the. Dted level 1 100m post spacings 1,442,401 data points. Shuttle radar topography mission dted level 1 3arc. The global multiresolution terrain elevation data 2010 gmted2010 provides a new level of detail in global topographic data.
Level 2 dted files have a minimum resolution of 1 arcsecond near the equator. The last letter of the file extension generally lists the level of the dted, although dted level 2. This is the best resolution dted map level that the app can use, with a nominal 30 meter cell spacing. Converts digital terrain elevation data from one level to another. 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. Dted level 2 corresponds to medium to large scale hardcopy products, and has a post spacing of one arcsecond, or 30 meter nominal resolution. The elevation data are with respect to the reflective surface, which may be. Srtm dted level 2 1 arc second data for the united states and territotial slands is.
Choose import dem dted level 0, 1 or 2 from the file menu and then. Here is some data that i downloaded from usgs in a format that is usable in atak its all of north, central and south america and the caribbean, except for brazil. 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. 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 addon will convert any dted file into a landserf. It provides basic quantitative data for all military systems that require terrain elevation, slope and gross surface roughness information. The level is indicated by the metadata within the file as well as the file name extension. Radio mobile rf propagation simulation software dted. I want to flatten the aoi so that when i superimpose satellite imagery it will look flat. Add dted data to a map layer geonet, the esri community. Click on the link to get more information about listed programs for view dt2 file action. Level 1 data are spaced at 3 arcseconds approximately 90m and level 2 data are spaced at 1 arcsecond approximately 30m intervals. 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.
In this the area of interest aoi is bumpy ie not flat. I remember about 78 years ago that data was still obtainable but it doesnt appear as though it is. Dted level 2 is a uniform gridded matrix of terrain elevation values with post spacing of one arc second approximately 30 meters. Vertical accuracy of the srtm dted level 1 of crete. Digital terrain elevation data dted dted is a uniform matrix of terrain elevation values. Those products and services that are available to the public can be obtained from the following sources. 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. Srtm dted1 is a uniform matrix of elevation values spaced 3 apart srtm dted, 2004. Exporting dted level 2 to dted level 0 global mapper forum. Gmted2010 is a suite of seven raster data products. Dted level 1 has a resolution of 3 arcseconds, or about 100 meters, increasing to 18 arcseconds near the poles. I saw some answers that this is possible using digitiser tool but i am not able to do this.
The gmted2010 product suite contains seven new raster elevation products for each of the 30, 15, and 7. Dted level 2 corresponds to medium to large scale hardcopy products, and has a post spacing of. The defense logistics agency dla aviation division is responsible for the. Some code to load and process digital terrain elevation data dted files. Have you found, downloaded or received an dt2 file, but dont know which software program is required to open it. Level 0 has a post spacing of approximately 900 meters. The edges of adjacent tiles have redundant records. User header label uhl field bytes contents description 1 uhl recognition sentinel 2 4 1 fixed by standard 3 512 dddmmssh longitude of origin lower left corner of data set. Open dt2 file dted digital terrain elevation data level 2.
Digital terrain elevation data national geospatial. In the end, i managed to add dted layer using rasterlayer. The 1 kilometer data and some higherresolution data is available online, as are product specifications and documentation. Military specification digital terrain elevation data dted milprf89020b, and amongst other parameters describes the resolution for each level. Srtm is the treetop elevation, while dted is the ground.
Each dted file contains elevation data for a 1 degree latitude by 1 degree longitude cell. Dted2 posts are spaced at 1 arcsecond xy intervals, or roughly every 30 meters, and are the highest resolution available to civilians. The dted format was developed for the distribution of gridded elevation data that was assembled by the us defense mapping agency dma. A data file of dted level 0 is produced from dted level 1 or vmap 0. Dted is a standard of digital datasets which consists of a matrix of terrain elevation values, i. 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. Raster to dteddata management toolbox documentation.
The conversion process includes interpolating the 12011201 grid of elevation data to 360601, which is the standard for level 2 dted data, then adjusting the header information accordingly. Because during my tests, i found that the elevation of the resulting dted 0 cell rather corresponded to an. Fme is the data integration platform with the best support for spatial. Dted level 1 corresponds to medium scale hardcopy products, and has a post spacing of three arcseconds, or 100 meter nominal resolution. Usgs eros archive digital elevation shuttle radar topography. Although nga has only published standards for level 1 3 arc second 90 meter and level 2 1 arc second 30 meter dted, theres strong interest in higher resolution terrain data. Use the free 21day full working demo to process the file at your location.