The data on this website mirrors the data available at. Aug 31, 2015 hi all, my name is zdenek, i am a very novice in gis. The nearglobal topographic maps of earth called digital elevation models dems are made from the cband radar data. An alternative srtm dataset has been developed by the cgiar consortium for spatial information cgiar csi. This version of the srtm digital elevation data has been processed to fill data voids, and to facilitate its ease of use. Srtm 90m digital elevation database cgiar platform for. Srtm data are distributed in a few common formats including.
Saint helena island, a photograph by nasa earth observatory. Countries institutions data application of the month data sources gis and remote sensing software external in person. They should be a considerable improvement on the 3 dem data on this site. The srtm dsm is delivered in three different versions finished, dted, cgiar, with different nominal accuracy covering a large part of the world at a resolution of 3 x 3. You see the z value in the image below that displays as you move your cursor across the image. The elevation data were forced to conform to the drainage patterns defined by the raster representation of. This database can be analyzed in the glcn software advanced database gateway adg, which provides a userfriendly interface and advanced functionalities to breakdown the lccs classes in their classifiers for further aggregations and analysis. For territories of norway, finland and denmark, these data were derived from 10 metre datasets released by national surveys. I dont know what tools would be needed to get data below water bathymetric data. The original 5 degree tiles are also subtiled for those users requiring data for smaller areas. Simplifying soil data management in subsaharan africa.
The srtm digital elevation data, produced by nasa originally, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data. The data can be configured as a dem and used for all profile and background generation or it can be used in conjunction with a bare earth dem such as ned data in gridfloat format as a clutter database. Michele a 90 meter grid is a very coarse for a dem in my experience. Srtm 90m digital elevation database cgiar platform for big.
All are produced from a seamless dataset to allow easy mosaicing. The shuttle radar topography mission is an international project developed by the. Accuracy assessment of the processed srtmbased elevation. May 27, 2015 learn how easy it is to search and download freely available shuttle radar topographic mission srtm dems, that were collected in february 2000 in a special joint mission onboard sts99, using x.
Srtm consisted of a specially modified radar system that flew on board the space. At the 2018 foss4g free and open source software for geospatial conference, our cgiar csi community coorganized a track on the use of foss4g in agricultural research and development, together with the geospatial and farming systems research consortium at uc davis. Srtm was a specially designed mission of the endeavour space shuttle, with a specially built sensor antenna, and aimed to. It uses the srtm 90m elevation data from cgiar csi which is downloadable free of charge. The difference in elevation, when compared to a bare earth dem is assigned to the. I think you will be hard pressed to find global dem coverage in vector format. The availability of srtm shuttle radar topography mission elevation data at resolution of 3 arcseconds for south america motivated this effort, as its acquisition under homogeneous conditions allowed undertaking information processing in a consistent manner. Holefilled srtm for the globe version 3, from the cgiarcsi srtm 90m database.
Click the primary dem tab and select srtm world from the digital elevation model drop down list. The srtm radar contained two types of antenna panels, cband and xband. This shuttle radar topography mission srtm dem was created from level 1 data which was cleaned and had holes patched. 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.
Agricultural research consortium for spatial information cgiarcsi. Srtm in arcgis desktop geonet, the esri community gis and. Global spatiallydisaggregated crop production statistics data for 2010. Srtm 90m digital elevation data from the cgiarcsi consortium for spatial. Pdf holefilled srtm for the globe version 3, from the cgiarcsi. The cgiar csi geoportal is able to provide srtm 90m digital elevation data for the entire world. The processed srtm 90 m digital elevation model dem for the entire globe was compiled by consultative group for international agriculture research consortium for spatial information cgiar csi and made available to the public via internet mapping interface. The shuttle radar topography mission srtm is an international research effort that obtained digital elevation models on a nearglobal scale from 56s to 60n, to generate the most complete highresolution digital topographic database of earth prior to the release of the aster gdem in 2009. The data originate in the nasa shuttle radar topographic mission srtm data held at the national map seamless data.
The shuttle radar topography mission srtm digital elevation dataset was originally produced to provide consistent, highquality elevation data at near global scope. Cgiarcsi at the africagis 2019 conference in kigali, rwanda. Download srtm data the data could be downloaded under the open database license. The contours are interpolated using the topogrid algorithm in arcinfo. Srtm in arcgis desktop geonet, the esri community gis. Geonames is switching from the original srtm data provided by nasa to the processed srtm v4. Space shuttle radar topography mission and aster advance space borne thermal emission and reflection radiometer dsms, have been issued and continuously updated. Improved srtm digital elevation data geonames blog. In this video, i have clearly shown the steps required to download 30m and 90m resolution srtm digital elevation model data from opentopography. Could you, please, give me some general guidelines, how to work with srtm data in arcgis desktop. I want to use a digital elevation model dem derived from a srtm image, the hecras software to represent a 1d 2d model. Mar 01, 2019 elevation provides easy download, cache and access of the global datasets srtm 30m global 1 arc second v003 elaborated by nasa and nga hosted on amazon s3 and srtm 90m digital elevation database v4.
A geoportal that provides srtm 90m digital elevation data for the entire world. Sep 07, 2018 srtm 90m digital elevation database v4. The global 1arcsecond 30m srtm digital elevation model is free and made available publicly a through the united states geological surveys earthexplorer site. How to download 30m and 90m resolution srtm digital. Both of these are raster formats and the elevation values are stored directly in each pixel of the raster grid. The data could be downloaded under the open database license. A digital hydrologic network supporting nawqa mrb sparrow. 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. The wonderful srtm project has the potential to provide global elevation data at up to 30m 1 arcsecond resolution, worldwide. Feb 20, 2012 geonames is switching from the original srtm data provided by nasa to the processed srtm v4.
Digital elevation data with srtm voids filled using. Version 2 is available it comes with the water bodies and coastlines. Elevation provides easy download, cache and access of the global datasets srtm 30m global 1 arc second v003 elaborated by nasa and nga hosted on amazon s3 and srtm 90m digital elevation database v4. Note that any download policies of the respective providers apply. The nasa shuttle radar topographic mission srtm has provided digital elevation data dems for over 80% of the globe. In the menu of the new window click files,import index and srtm hgt files. Unless you have very wide rivers, id think you would have a tough time accurately defining the rivers using arc hydro. The nasa shuttle radar topographic mission srtm has provided digital elevation data. Other data available include satelliteaerial imagery, digital maps, and habitat data. Opendem the portal for sharing free digital elevation models and xyz height datasets. Digital elevation models dem for the entire globe, covering all of the countries of the world, are available for download on this site. Srtm is digital elevation model from 56 s to 60 n in a three arcsecond 90 m resolution. The data could be visualised in 3d with the virtual terrain software.
New 1 digital elevation data for northern europe were added on 26 may 2014. Generating hgt files from srtm 90m digital elevation. River analysis using srtm data geonet, the esri community. Geographic information systems stack exchange is a question and answer site for cartographers, geographers and gis professionals. The track included 26 presentations covering a variety of topics, from the mapping of. Topographic map of saint helena by barry weaver and jeanpierre langer. The data does not incluse the shetland islands as srtm data becomes unreliable at 60n. The srtm digital elevation data, produced by nasa originally, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data for large portions. Cgiar consortium for spatial information cgiarcsi is the geospatial science community of practice that facilitates cgiar s use of geospatial data and analysis in research. Topogrid, based upon the established algorithms of hutchinson 1988, 1989, is designed to use contour and point elevation data along with mapped hydrography to produce hydrologically. Feb 24, 2014 i would think that the 90m dem would be inadequate for hecras modeling.
The srtm 90m dem s have a resolution of 90m at the equator, and are provided in mosaiced 5 deg x 5 deg tiles for easy download and use. Srtm or directly from their ftp site files are named according to latitude and longitude. We would like to show you a description here but the site wont allow us. This database can be analyzed in the glcn software advanced database gateway adg, which provides a user. This dataset is also based on the original srtm dataset published by the u. The original srtm elevation data are used to produce contours at an interval of 10 meters. Download srtm 30m digital elevation models for free. 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 is presented in osgb coords and is free to use and distribute. This new version of database covers from 1901 to 2006, globally at 0. How can i convert what is supplied into hgt files with the same naming convention as what i currently have.
May 28, 2019 elevation provides easy download, cache and access of the global datasets srtm 30m global 1 arc second v003 elaborated by nasa and nga hosted on amazon s3 and srtm 90m digital elevation database v4. For a description of the project, see the nasajpl srtm site. Consortium for spatial information consultative group for international agriculture research. In the next post we will compute grids of aspect and slope from this dem. Srtm digital elevation data version 4 earth engine data.
Als freie software kann grass gis srtm daten mit dem modul. You will likely need to find another data source to get the information you want. Srtm vertical datum confirmation geoid or ellipsoid. This software allows you to create your own maps and visualizations of your own data. The three us elevation grids and the srtm based international elevation data described earlier were merged into a single digital elevation model dem. The srtm digital elevation data, produced by nasa originally.
To unpack the package including the revisions, use cabal get. Dec 03, 2014 digital elevation model covering the same area that the vesuvius image, and with the same pixel size. Generating hgt files from srtm 90m digital elevation database. Learn how easy it is to search and download freely available shuttle radar topographic mission srtm dems, that were collected in february 2000 in a special joint mission onboard sts99, using x.
Hi all, my name is zdenek, i am a very novice in gis. The shuttle radar topography mission cband data for north america and south america are available to the public. The aster digital elevation model dem product is generated using bands 3n nadirviewing and 3b backwardviewing of an aster level1a image acquired. I downloaded the srtm 90m digital elevation database v4. Click the file index button and a new window will appear. There are 2 ways that srtm data can be used with pathloss 5. Pdf the digital elevation model that has been derived from the february. The extract files now contain srtm data where available and gtopo30 elsewhere. 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. This package has metadata revisions in the cabal description newer than included in the tarball.
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