The data was released continent by continent, as and when the data was processed by nasa and the usgs. In these data, the elevations are captured at the top of buildings, trees, structures, and other objects rather than at ground level. It appears that the global 1arcsecond 30m srtm digital elevation model is now being made publicly available through, for example, the united states geological surveys earthexplorer site. Downloading srtm data geographic information systems stack. Dec 03, 2014 clicking in results will show us the 1 x 1 tiles in which srtm data are compiled. The topographic maps and geographical information system gis data provided in the. The shuttle radar topography mission srtm data products result from a collaborative mission by the national aeronautics and space administration nasa, the national imagery and mapping agency nima, the german space agency dlr and italian space agency asi, to generate a nearglobal digital elevation model dem of.
The national aeronautics and space administration nasa and the national geospatialintelligence agency nga participated in an international project to acquire radar data which were used to create the first nearglobal set of land elevations. See an index map of the newly available fullresolution data. Free satellite data, satellite imagery, digital elevation models dems, topographic maps and free software links. Click fetch to start the download if you have selected 1 srtm as the data type, you will be prompted to enter your earthdata login credentials.
Data can be downloaded using a browser or accessed directly from the ftp site. South america is now complete and can be downloaded via the world coverage table. Ill take it as a little exercise in how to program a data reader. Apr 19, 2019 these files have been processed to fill data voids and there is a corresponding kmz file which contains a 90meter index for growing srtm data. The dem data are provided in motorola or ieee byte order, which stores the most signi.
The data could be downloaded under the open database license the data could be visualised in 3d with the virtual terrain software srtm digital terrain model of germany. Generally, accuracy is quite good, but is not always up to srtm standard. However, if a user needs access to the actual elevation values for analysis in arcinfo the dem must be converted to an arcinfo grid with the command imagegrid. The srtm radar contained two types of antenna panels, cband and xband. The dem data on this site are version 3 of the csisrtm data with included improved clipping of shorelines using the srtm water bodies data swbd, and improved interpolation of voids areas using high resolution auxiliary data for us, canada, mexico, europe.
Srtm 90m digital elevation database cgiar big data platform. Srtm data is usually available direct from nasas website no longer ftp. Open and merge dems on the file, open submenu do automatic filling of the voids. Maps and gis data are available for digital download. In many areas srtm data provide the only topographic data set. An overview of the different versions is given in figure 2 in the srtm user guide jplnasa version 1 srtm nonvoid filled, unedited elevation data us. An example script that will import eight srtm files, remove their voids, flood all elevations below 0 to sea level and add appropriate colour and title metadata is shown below. Usgs ascii dem format is not particularly good as a data format because it is ascii. File size is approximately 25 mb for 1arcsecond data files and approximately 3 mb for 3arcsecond data files. Parent directory documentation navmac800qsfile srtm1 srtm3 srtm30 swbd.
Imports data from the nasa shuttle radar topography mission into a postgis database and other databases in the futue. The srtm digital elevation data, produced by nasa originally, is a major. By early 2004, 3 data for north america, south america, eurasia, africa, australia, and islands was available. Done the srtmgrid file will now process your hgt files to a georeferenced grid. Click on yellow tiles to download their corresponding data.
Srtm3 data are among the best global elevation data, with a grid resolution of approximately 90 m. May 11, 2014 i just finished developing a tool for whitebox gat that will automatically download shuttle radar topography mission srtm digital elevation models dems from the usgs srtm ftp site. These files can get quite large so you may have to divide the area up into smaller chunks. Ocean, lake and river shorelines were identified and delineated from the 1 arcsecond dted2 data for details see nasa 2003 and were saved as vectors in esri 3d shapefile format esri 1998. The nasa shuttle radar topographic mission srtm has provided digital elevation data dems for over 80% of the globe. The areas where we processed the data with the void filling algorithm are stored iin the mask data are in. The glcf is also a convenient way to browse and download srtm data.
Mapping the earth the shuttle radar topography mission. The main source is still srtm, but where srtm data are void or anomalous there is input from gdem, landsat and various topographic maps. The data is published for download here, but its sliced into thousands of small files, and i dont see an ftp option for more efficient downloading. The shuttle radar topography mission srtm data products result from a collaborative mission by the national aeronautics and space administration nasa, the national imagery and mapping agency nima, the german space agency dlr and italian space agency asi, to generate a nearglobal digital elevation. Tiles come as zipped srtmhgt files at 1arcsecond resolution 3601x3601 pixels in a latitude. Global multiresolution terrain elevation data 2010. However, due to high demand and occasional maintenance, the site is.
See the africa image above and its caption at the pia04965. The usgs ned files are large and can a long time to download. Shuttle radar topography mission data was first released in early. But the difference is i do not have the same pattern to be able to download all the files. Each file describes a tile with a height of one degree of latitude and a width of one degree of longitude. For a description of the project, see the nasajpl srtm site. Have a look at the documentation srtm data are distributed in two levels. This data is processed srtm data which means bad data and no data voids have been removed. This is a standard image format for gis applications. Click on the srtm30 tile to download the digital elevation map dem from the place you select. The dem files have been mosaiced into a seamless global coverage, and are. The location of the region for data contained in a file is described by the name of the file itself.
This data is currently distributed free of charge by usgs and is available for download from the national map seamless data distribution system, or the usgs ftp site. Srtm elevation data are intended for scientific use with a geographic information system gis or other special application software. An overview of the different versions is given in figure 2 in the srtm user guide. You will find at this site elevation data stored in the directories. The shuttle radar topography mission srtm was flown aboard the space shuttle endeavour february 1122, 2000. Mrlc multi resolution land characteristics for ned and nlcd data in bil format. The nearglobal topographic maps of earth called digital elevation models dems are made from the cband radar data. We would like to show you a description here but the site wont allow us.
This makes the file size several times larger than a well. The shuttle radar topography mission srtm wikipedia article is a nasa mission conducted in 2000 to obtain elevation data for most of the world. It is the current dataset of choice for digital elevation model dem data since it has a fairly high resolution 1 arcsecond, or around 25 meters, has nearglobal coverage from 56s to 60n, and is in the public domain. Plugin for blender written in python, used to import srtm shuttle radar topography mission data as a mesh. The shuttle radar topography mission srtm collected highresolution elevation data during the february 2000 flight of the space shuttle endeavour. How to download and upload files using ftp command line. The data are available for download and can be used in surfer. Nasa 3 second data approx 90m grid the files are downloaded from this website ftp. An excellent dem data source digital elevation model or dem is the digital representation of earth surface. Type show wo and verify you are in the right location. Using shuttle radar topography mission srtm data in surfer. This can be adapted for importing and tiling any set of srtm data by changing the appropriate file names and base directory, and possibly the new projection to use. 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.
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. An individual file covers a 5 degree grid so the size of the files can be up to 63mbytes. Canadian digital surface model, 2000 open government portal. Space shuttle radar topography mission several srtm data versions and products are available. The new data are available for download from the usgs eros data center see public data distribution for details. Surfer does not read the data files directly, but the data are available in two formats that can be modified for use in surfer bil.
Digital elevation data with srtm voids filled using. Free sample srtm shuttle radar topography mission back description. The wonderful srtm project has the potential to provide global elevation data at up to 30m 1 arcsecond resolution, worldwide. The shuttle radar topography mission cband data for north america and south america are available to the public.
Hgt height files contain elevation data for regions of the earths surface, as acquired by the shuttle radar topography mission strm. Jplnasa version 1 srtm nonvoid filled, unedited elevation data us. 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. I just finished developing a tool for whitebox gat that will automatically download shuttle radar topography mission srtm digital elevation models dems from the usgs srtm ftp site. For instance, if we divide a 100 meter by 100 meter area into 100 by 100 square grids or 101x101 grid points, well end up 0 squares. The dem files have been mosaiced into a seamless nearglobal coverage up to. Public terrain data free of charge fetchsrtm download tool for finding and downloading srtm, ned and nlcd terrain data. A cookie will be stored and subsequent downloads will not require the login. Srtm did not produce data for the northernmost latitudes or antarctica.
Then, you can use this function to download the srtm data for your region of interest. Free digital elevation model dem and free satellite data. If you want to download srtm data, those data are available at the us. This will remove smaller holes, but not the large swiss cheese dems in many mountainous regions. These files have been processed to fill data voids and there is a corresponding kmz file which contains a 90meter index for growing srtm data. Map library can graphically open and merge tiles on the fly. Does anybody know a ftpadress where we can download srtm1. If you have selected 1 srtm as the data type, you will be prompted to enter your earthdata login credentials. Height data from these sites or data files in the same formats are supported. Srtm or directly from their ftp site files are named according to latitude and longitude. Users of arcinfo or arcview can display the dem data. We simply download them, using the icon with a green arrow next to each result item in the results list. Users of arcinfo or arcview can display the dem data directly after renaming the.
1221 684 383 256 1540 372 1572 576 33 1008 151 901 1124 1034 569 1265 94 1311 220 1165 1385 324 833 1069 526 227 141 596 1215 1229 462 437 197