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. Srtm dted is a uniform matrix of elevation values indexed to specific points on the ground. The two classes of dted are known as dted, level 1. The dted format for level 0, 1 and 2 is described in u. The data was released continent by continent, as and when the data was processed by nasa and the usgs. Nga to produce the finished srtm digital terrain elevation data level 2 dtedr 2. Height data from these sites or data files in the same formats are supported.
Coverage maps indicating the availability of srtm products are available for download. The srtm 90m dems have a resolution of 90m at the equator, and are provided in mosaiced 5 deg x 5 deg tiles for easy download and use. Besides the elevation information, a confidence level height error map, hem. A reference digital elevation model dem, produced from contour lines digitization, from topographic maps at scale 1. Terrain elevation data dted from the shuttle radar topography mission srtm. Digital elevation models dem for the entire globe, covering all of the countries of the world, are available for download on this site. 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. Shuttle radar topography mission dted level 1 3arc second. For example, 30 meter post spacing means there is a distance of 30 meters between the readings. The level of processing and the resolution of the data will vary by srtm data set. Dted2 was then aggregated into 3 arcsecond dted1 data. Srtm dem data is being housed on the usgs earth explorer.
Dted level 1 is a uniform matrix of terrain elevation values with post spacing every 3 arc seconds approximately 100 meters. This is the best resolution dted map level that the app can use, with a nominal 30 meter cell spacing. Toolbox path and indicate the names of data sets that you can download or order on. Level 1 has a post spacing of approximately 90 meters. Digital terrain elevation data dted is a standard mapping format designed by.
Each dted file contains elevation data for a 1 degree latitude by 1 degree longitude cell. Milprf89020b not 1 digital terrain elevation data dted. Full admission is required by the fifth week of the first semester. In fact, it is anticipated here that, regardless of the cgiarcsi download. 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 dted level 0 data is relatively small, and is often published as a concatenation of large area or global. This interface attempts to ease the pain of downloading 30meter resolution elevation data from the shuttle radar topography mission click on yellow tiles to download their corresponding data tiles come as zipped srtmhgt files at 1arcsecond resolution 3601x3601 pixels in a latitudelongitude projection, downloaded from nasa servers. 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. Earthexplorer offers srtm data with a regularly spaced grid of elevation points in three file formats. The srtm digital elevation data, produced by nasa originally, is a major. Please note that tiles above 50 north and below 50 south latitude are sampled at a resolution of 2 arcsecond by 1 arcsecond. Srtm dted level 1 values are derived from the srtm dted 2. Shuttle radar topography mission dted level 1 3arc second data dted1.
Shuttle radar topography mission dted level 1 3arc. The shuttle radar topography mission srtm dem was created from level 1 data which was cleaned and had holes patched. The first release of shuttle radar topography mission srtm data was provided in 1degree digital elevation model dem tiles from the usgs ftp server ftp. Srtm 1 arc second dted l2 format data for tak here i s some data that i downloaded from usgs in a format that is usable in atak. Dted 2 was then aggregated into 3 arcsecond dted 1 data. The lowest resolution data is available to the public. Srtm dted1 is a uniform matrix of elevation values spaced 3 apart srtm dted, 2004. Dted level 1 corresponds to medium scale hardcopy products, and has a post. The lowest resolution data is the dted level 0, with a grid spacing of 30 arcseconds, or about 1 kilometer. The announcement was made at the united nations heads of state climate summit in new york. The military format specification milprf89020b for the digital terrain elevation data dted is available in a multitude of locations, including the nga reference site and at the usgs which publishes some srtm data in dted format. Dec 03, 2014 getting started with srtm elevation data. Srtm derived 1 second digital surface model dsm version 1. Srtmderived 1 second digital surface model dsm version 1.
Dted level 2 elevation values are spaced one arc second apart. The digital elevation models dem derived from the srtm xsar data are provided in the dted format. Certain higher resolution data is restricted to the u. These included a 1 arcsec dem nasa srtm1, publicly released for the contiguous. 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. Dted level 1 is a uniform matrix of terrain elevation values with post spacing every 3. All bodies of water with an axis greater than 1,200 meters for level 1 dted or greater than 600 meters for level 2 dted must be flattened. There may be good dted level 1 data resolution 3, based on 250k maps for some. 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. Srtm was a specially designed mission of the endeavour space shuttle, with a specially built sensor antenna, and aimed to map the earths land. Vertical accuracy of the srtm dted level 1 of crete request pdf. Digital terrain elevation data dted are produced at two different levels of detail.
The shuttle radar topography mission srtm is a tremendous resource because of its high accuracy and its consistency as a snapshot of earths surface, acquired over just 10 days during february 2000. Um srtmdted level 2daten importieren zu konnen schalte man per extrastesttestgeniererung. Sea or ocean elevation values for dted level 1 or dted level 2 shall be zero. Im dialogfenster rohdatenimport spaltenanzahl 4800. The lowest resolution data is the dted level 0, with a. 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. All finishing steps were performed at the original 1 arcsecond resolution, resulting in dted level 2 data products. The usgs chart below shows morgan lake in new mexico. Mexican 1 data have helped in some areas of high relief.
Shuttle radar topography mission water body dataset, shuttle radar topography mission dtedr level 1 3arc second data. In addition to ngas own dteds, terrain data from shuttle radar topography mission srtm, a cooperative project between nasa and nga, are also available in dted format, levels 1 and 2 see below. Bookmark url global change master directory gcmd nasa. Shuttle radar topography mission srtm 1 arc second over. The dma later changed its name to national imagery and mapping agency nima but is now called the national geospatial intelligence agency nga. 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 announcement was made at the united nations heads of. Data for mexican territory are primarily from srtmgdem. Digital terrain elevation data dted is a standard mapping format designed by the nga. Gdp and the map of the world mow download nga products plugin. Usgs, 2006b, shuttle radar topography mission dted level 1 3. This edition includes the shuttle radar topography mission \srtm\ dted level 1 and level 2 requirements. Srtm data is being used to generate a digital topographic map of the earths land. Sep 05, 2006 shuttle radar topography mission dted level 2 1 arc second data on dvd united states and territorial islands srtm dted is a uniform matrix of elevation values indexed to specific points on the ground.
Dted level i is the basic medium resolution elevation data source for all military activities and systems that require landform, slope, elevation, andor gross terrain roughness in a digital format. Dted converter is an easy to use application that converts digital terrain elevation data dted from one level to another download dted converter 1 2 for windows download now. 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. How to download srtm data for use in atakwintakwebtak.
But heres a usgs earth explorer download guide to help you get started. Dted level 1 has a resolution of 3 arcseconds, or about 100 meters, increasing. In accordance with the dted 2 specification, the terrain elevation data have been edited to portray water bodies that meet minimum. Data dted level 2 standard 10, and referred to as dted2 in the following. Digital elevation data with srtm voids filled using accurate. Unlike srtm3, however, dted1 has been generated by subsampling, i.
The horizontal datum is the world geodetic system 1984 wgs84 and the vertical datum is mean sea level as determined. The digital elevation models dem derived from the srtmxsar data are provided in the dtedformat. Download dted 2 book 1 almost free books world public. On september 23, 2014, the white house announced that the highestresolution topographic data generated from nasas shuttle radar topography mission srtm in 2000 was to be released globally by late 2015. If you download files one at a time, you can get dted or geotiff in. The data is available as 1by1 degree quadrangles at horizontal resolutions ranging from about 1 kilometer to 1 meter. This interface attempts to ease the pain of downloading 30meter resolution elevation data from the shuttle radar topography mission click on yellow tiles to download their corresponding data. The data does not include the shetland islands as srtm data becomes unreliable at 60n. For information on locating map data for download over the internet, see the.
The military format specification milprf89020b for the digital terrain elevation data dted is available in a multitude of locations, including the nga reference site and at the usgs which publishes some srtm data in dted format 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, at the 30 arc. 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. Dted level 1 corresponds to medium scale hardcopy products, and has a post spacing of three arcseconds, or 100 meter nominal resolution. The 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. The dpdw ingests the srtm data products, checks them for formatting errors, loads the srtm dted into the nga data distribution system, and ships the public. The srtm collections are located under the digital. Level 0 has a post spacing of approximately 900 meters. Drains with a width equal to or greater than 183 meters shall be visible in the. The srtm xsar dem 1 arcsec offered here for download were processed. Derived from nasas srtm data, this dsm had been processed to remove artifacts and errors inherent to the data. This video shows how to download srtm for use in atak. It consists of geographic, attribute, and textual data stored on cdroms. Usgs, 2006b, shuttle radar topography mission dted level 1 3arc.
The 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. The dted1 and dted2 dems were then returned to nasa for public. All oceans and sea elevations are set to zero and in falconview the area is colored blue. The level determines the post spacing or the distance between elevation values. Vertical accuracy of the srtm dted level 1 of crete. See the section below for a 2014 update srtm shuttle radar topography mission, a joint project between the nima and nasa to produce digital topographic data for 80% of the earths land surface all land areas between 60. Under the data sets tab, select digital elevation srtm srtm 1arcsecond global. Its all of north, central and south america and the caribbean, except for brazil. Usgs, 2006b, shuttle radar topography mission dted level 1 3 arc. 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. Unlike srtm 3, however, dted 1 has been generated by subsampling, i. Digital elevation shuttle radar topography mission srtm usgs.
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