Some code to load and process digital terrain elevation data dted files. Falconview doesnt support dted 0 so this is only a curiosity. 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. Digital terrain elevation data dted dted is a uniform matrix of terrain elevation values and provides basic quantitative data for systems and applications that require terrain elevation, slope, and gross surface roughness information.
Height data from these sites or data files in the same formats are supported. Contour map shows contour lines with relative space indicating the relative slope of the surface. 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. In addition to the large data voids, srtm holes occur when the sensor was blocked on all passes. 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. Norway, sweden and the faroe islands where no srtm data is available. The gmted2010 product suite contains seven new raster elevation products for each of the 30, 15, and 7. Installation and running instructions are located here.
Dted level 0 elevation post spacing is 30 arc second nominally one kilometer. Dted is the milspec and the data in that format published by nga. 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. Digital terrain elevation data dted vector maps vmap compressed arc digitized raster graphic cadrg cadrg is a joint services standard map background product. Nasa has released version 2 of the shuttle radar topography mission digital topographic data also known as the finished version. Dted digital terrain elevation datathis is a format specification with specific aspects about resolution and accuracy of elevation data, defined by the nga national geospatial intelligence agency. Dted was used as the source for most of eurasia and large parts of africa and the americas.
Digital terrain elevation data dted is a standard mapping format. Terrain elevations are described as the height above the earth gravitational model 1996 egm96 geoid, not the. Level 0 covers only about 50% of the area covered by gtopo30, but much of the difference is in antarctica. This standard was originally developed in the 1970s to support aircraft radar simulation and prediction. Importing real world locations into unreal engine 4. Downloading satellite data from usgs websites youtube. 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.
Global multiresolution terrain elevation data 2010. Gesch global land onekm base elevation globe model and other comparable 30arcsecondresolution global models, using the best available data. Natural earth features 9 types of raster files at 1. 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. September 2008 edited september 2008 in elevation data. In support of military applications, the national imagery and mapping agency nima has developed standard digital. Shuttle radar topography mission data was first released in early 2002, two years after. These digital elevation model dem data files are produced by the u. In accordance with the dted 2 specification, the terrain elevation data have. Webgis is where you can find all the leading information and resources for geographical information systems. Load into world builderworld engine and have it export as tiled assets for unreal to read.
Embedded content includes land cover, shaded relief, ocean water, and drainages with lakes. The new model is called the global multiresolution terrain elevation data 2010, or gmted2010 for short. Ufouo if the installroot does not fix the issue and browser trust issues occur, an immediate workaround is to visit individual urls in a separate tab and manually trust the ssl certificate. Srtm dted is a uniform matrix of elevation values indexed to specific points on the ground. Digital elevation shuttle radar topography mission. The maxminavg values are calculated using dted 1 data. After opening qgis, we first need to extract the downloaded file, and import the. Dted level 2 30m will be available thru the 2000 sts99 shuttle ifsar mission in 2001. Hi, does anyone know if i can buy a cd or dvd of level 0 dted data for the whole world. Download free and lossless lidar compression data wikipedia. Dted products are produced at three levels of resolution described below.
Dted files digital terrain elevation data what it is. Digital terrain elevation data dted dted is a uniform matrix of terrain elevation values. The files have file names with the extension dtn, where n is the level of the dted product. In this video ive explained how to download satellite data i. 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. I know i can download it, but you can only download small bits at a. Interactive coverage maps supplied by christoph hormann. The global multiresolution terrain elevation data 2010 gmted2010 provides a new level of detail in global topographic data. Global multiresolution terrain elevation data 2010 gmted2010 by jeffrey j. Dted or digital terrain elevation data is a standard of digital datasets which consists of a matrix of terrain elevation values, i. The classis global 30 arc second elevation data set around 1km resolution same resolution as dted0, globe and srtm30 but older and less accurate. If you want the format specification, you should edit the question to state this.
Webgis free terrain data geographic information systems. Geological survey usgs with a horizontal grid spacing of 30 arc seconds approximately 900 meters. Here we will open dem in qgis and create the contour map. The lowest resolution data is the dted level 0, with a grid spacing of 30 arcseconds, or about 1 kilometer. Fme is the data integration platform with the best support for spatial. If you want to use only dted for elevation models, youll have to change the default configuration to remove the srtm elevation model from the mix. Usgs eros archive digital elevation shuttle radar topography. 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. Version 2 is the result of a substantial editing effort by the national geospatial intelligence agency and exhibits welldefined water bodies and coastlines and the absence of spikes and wells single pixel errors.
In this video we take a look at how we can take real world terrain data to generate a terrain that is 1. Load into world builder world engine and have it export as tiled assets for unreal to read. Dted level 0 was derived from nga dted level 1 to support a federal agency. This 1arc second global digital elevation model has a spatial resolution of about 30 meters. It is produced in multiple scales in support of systems with map. 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. 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. You can find published specifications for dted at the nga website.
Usgs hydro 1k elevation derivative database is a version of gtopo30 which has been corrected. Gtopo30 is a global digital elevation model dem produced by the u. We dont have to do hectic work like this as webgis provides us with readymade digital elevation data. Geological survey usgs and provide coverage in 1 by 1 degree blocks with approximately 90 by 90 meter resolution for all of the contiguous united states, hawaii, and limited portions of alaska. We also operate the landsat satellite program with nasa, and maintain the largest civilian collection of images of the earths land surface in existence, including tens of millions of satellite. Global multiresolution terrain elevation data 2010 gmted2010. Digital terrain elevation data national geospatial. Elevation data digital elevation models l3harris geospatial. For more information, see the continental links below.
Shuttle radar topography mission dted level 1 3arc second data dted1. Digital elevation model is a 3d representation of a terrain. It is generated by collecting elevation points of terrain. An nga online capability where a community of screened users can edit existing content and contribute new features to maps throughout the world. The dma later changed its name to national imagery and mapping agency nima but is now called the national geospatial intelligence agency nga. There is a pressing need to monitor and understand the rapid land change happening around the world. I began the task of filling them from alternative sources in may 2005 and completed it in november 2012, completing nasas mission to map the world. Geological survey is developing a new capability, called land change monitoring, assessment, and projection lcmap, to innovate the understanding of land change. Gtopo30 was derived from several raster and vector sources of topographic information. Dted level 2 is a uniform gridded matrix of terrain elevation. The dted format data will generally perform adequately. The documents listed in this section are needed to meet the requirements specified in sections 3, 4, and 5 of this. It provides basic quantitative data for all military systems that require terrain elevation, slope and gross surface roughness information. Used in study to find large flat areas of world as possible places to locate gammaray telescope array.
Looking at a more micro example, heres a very small srtm dted hole in. Digital terrain elevation data dted is produced at three different levels of detail. Srtm dem data is being housed on the usgs earth explorer. The file extension is dem but its not the same format as normal usgs dem. Access constraints srtm dted level 1 3 arc second data for global coverage is distributed. More than 10 years later, nasas srtm data still do not cover these areas. The dted format was developed for the distribution of gridded elevation data that was assembled by the us defense mapping agency dma. If you download files one at a time, you can get dted or geotiff in addition to bil, but. 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. The raster files measure 10,800 x 5,400pixels and register precisely with the 1.
Digital terrain elevation data dted map and data library. Srtm was a specially designed mission of the endeavour space shuttle, with a specially built sensor antenna, and aimed to. Subsampled data are also known as thinned, or sampled 4. This capability is the earth resources observation and science center s. Digital elevation data with srtm voids filled using. At the usgs eros center, we study land change and produce land change data products used by researchers, resource managers, and policy makers across the nation and around the world. Topographic maps, publications and digital products the department of the interior, u. With mapping toolbox you can read geodata files in general purpose formats e. Looking at a more micro example, heres a very small srtm dted hole in colorado. Support for dted elevation data in recent worldwind builds. The fact of the matter is that the resolution of the default srtm elevation model is essentially dted2 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. Earth resources observation and science eros center.
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. The whole world is now on this site at 3 and 15 arc second resolutions. The three classes of dted are known as dted level 0, dted level 1. 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. Dted level 0 and dted level 1 files are in the same format albeit at different post spacings, as published in the milprf89020b document. So other dted data you add is likely to give you a less accurate elevation. Geological survey usgs is the distributor of public sale nga topographic maps, publications and digital products. This edition includes the shuttle radar topography mission \srtm\ dted level 1 and level 2 requirements. 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. This data was collected during the shuttle radar topography mission srtm and. Many vector and raster data formats have been developed for storing geospatial data. Also, it covers most of the world with absolute vertical height accuracy of less than 16m.
480 496 998 1390 99 230 1656 1499 391 1324 1625 1182 1552 571 1385 1040 722 781 1038 515 1409 766 118 621 922 55 184 230 1247 165 1248 127 582 814 260 820