Staged productsthe topographic maps and geographical information system gis data provided in the national map are pregenerated into downloadable products often available in multiple formats. Usgs srtm was declared public domain for the older version, now conditions mentions. Topography plays a major role in determining the accuracy of flood inundation areas. It is generated by collecting elevation points of terrain. 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. Usgs hill shade base map service from the national map data. The usgs website used to have landsat data on their website but requires clean up before use. National boundaries dataset, 3dep elevation program, geographic names information system, national. Gtopo30 was derived from several raster and vector sources of topographic information.
The srtmxsar data may be obtained through the german aerospace center dlr. Usgs standard onemeter dems are produced exclusively from high resolution light detection and ranging lidar source data of onemeter or higher resolution. Traditionally, most usgs data was on printed maps, 7. Free digital elevation model dem and free satellite data. The shuttle radar topography mission srtm obtained elevation data on a nearglobal scale to generate the most complete highresolution digital topographic database of earth. Usgs eros archive digital elevation srtm coverage maps.
We will be using shuttle radar topography mission srtm data, a near global digital elevation model dem collected in february 2000 aboard nasas space shuttle endeavour mission sts99. For the topographic map of yemen, i think you can get that from survey of yemen or. In this study, the quality of dems acquired by srtm ver. If youre looking for topographic maps for the united states, the first place to look is the usgs topo maps series. The nearglobal topographic maps of earth called digital elevation models dems are made from the cband radar data. The elevation layers distributed with hydrosheds are based on a combination of the original srtm 3 and dted1 elevation models of srtm for further specifications see 2. 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 collection was made possible by jared benedict of the libre map project and over 100 map liberators listed in the lower lefthand column of this page. The usgs shaded relief base map service from the national map was created with data from the 3d elevation program 3dep for large and medium scales 1. Pakistan digital topographic maps, satellite imagery, dems, drgs. How to download usgs topo maps for free gis geography.
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. Free satellite data, satellite imagery, digital elevation models dems, topographic maps and free software links. The srtm system gathered data at the rate of 40,000 per minute over land. However, many areas in the united states and around the world do not have access to high quality topographic data in the form of digital elevation models dem. Download free elevation data dem from the usgs national map and nrcs geospatial data gateway duration. The shuttle radar topography mission srtm obtained elevation data on.
We will be working with gmted2010 dataset from usgs. The version we will be using is the 1 arcsecond global srtm dataset, an enhanced 30 meter resolution dem that was released last year. This site provides applications and web map services for topographic information for the nation. Since 1884, the purpose of these general use maps has been to display the complex, changing geography of the united states. The elevations in this dem represent the topographic bareearth surface. Shuttle radar topography mission srtm gl3 global 90m. Click to go to the collection page for usgs drg maps of all 50 states.
Shuttle radar topography mission srtm data has been available for most of the globe at 3 arc seconds 90m cell resolution for over a decade. The mola dem represents more than 600 million measurements gathered between 1999 and 2001, adjusted for consistency neumann et al. The ned is a seamless raster dataset developed by merging the highestresolution, bestquality 1. This paper presents the results of a global assessment of the unique shuttle radar topographic mission srtm dem.
This makes the file size several times larger than a well. After opening qgis, we first need to extract the downloaded file, and import the. An assessment of the srtm topographic products, technical. Mgs launched on november 7, 1996 atop a threestage delta ii launch vehicle from launch pad 17a at cape canaveral air station, fl. Digital elevation model is imperative to many earth surface process analyses. Gtopo30 is a global digital elevation model dem produced by the u. It is a substantial improvement over the 3 arcsecond 90 meter srtm data previously available for ireland. Usgs ascii dem format is not particularly good as a data format because it is ascii. Unfortunately, many download interfaces wont produce a map of these quads.
Mars mgs mola dem 463m v2 usgs astrogeology science. Gmted global multiresolution terrain elevation data is a global terrain dataset that is the newer version of gtopo30 dataset. The data was released continent by continent, as and when the data was processed by nasa and the usgs. The srtm xsar data may be obtained through the german aerospace center dlr. This includes hydrography, place names, contour lines and cultural features of the nation. Digital elevation data with srtm voids filled using. Normally, in malaysia, the topographic information normally gathered from topographic maps which can be bought from government agency. 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. Usgs hill shade base map service from the national map. Optional format is available for download through the usgs earth explorer. Elevation data are derived from photogrammetric data sources and direct capture from usgs topographic maps. Geological surveys usgs national geospatial program, the national map is a collaborative effort among the usgs and other federal, state, and local partners to improve and deliver topographic information for the nation. The usgs is the largest producer of printed topographic maps, and, prior to. These maps are best used with global positioning software or a map viewer.
This data can be downloaded from the usgs earthexplorer site. Each quadrilateral map quad map has a unique name, which is useful for locating and referencing the data. Srtm 1 arcsecond dem data are also available for the united states. In this tutorial i will show you how to create a hillshaded topographic map in qgis.
Download srtm 30m digital elevation models for free. In 2014 the usgs decided to release the 1 arc second data which works out to about 30m cell. The thirdstage star 48b solid rocket later propelled the spacecraft out of earth orbit and on its way. Digital elevation model is a 3d representation of a terrain. Opentopography shuttle radar topography mission srtm. Usually the srtm data can be downloaded from usgs earth explorer or nasa earth data server. Nasa has only released 1 srtm data for us territory. For most of the alps and the most rugged parts of the pyrenees, these were created from the most detailed sources, and should be accurate. Here we will open dem in qgis and create the contour map. 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. The nasa shuttle radar topographic mission srtm has provided digital elevation data dems for over 80% of the globe. We dont have to do hectic work like this as webgis provides us with readymade digital elevation data. Pakistan srtm shuttle radar topography mission dem data available at 1 arc second ca.
Onemeter dem surfaces are seamless within collection projects, but, not necessarily seamless across projects. I have created hgt files with a resolution of 1 for some parts of europe from topographic maps. Nasa has released version 2 of the shuttle radar topography mission digital topographic data also known as the finished version. Topographic maps map resources library guides at purdue. Maps indicating the availability of srtm products are available for download. Pakistan digital topographic maps, satellite imagery, dems. The srtm radar contained two types of antenna panels, cband and xband.
Additionally srtm was used to generate the 945 m contour, point heights for sandy ridges, resolve stream topology, identified fossil dune ridges and provided the topographic crosssections fig. Nasadem extends the legacy of the shuttle radar topography mission srtm by improving the digital elevation model dem height accuracy and data coverage as well as providing additional srtm radarrelated data products. Usgs eros data center edc distributes and archives srtm data for nasa in accordance with policy guidelines set forth by nasanga memorandum of understanding. May 24, 2019 the usgs shaded relief base map service from the national map was created with data from the 3d elevation program 3dep for large and medium scales 1. Digital elevation model elevation data on this cdrom are from the usgs national elevation dataset ned. Dem are provided for 1degree grids for the whole of the us, for 7. This data was used to produce topographic maps digital elevation maps 30 times as precise as the best global maps used today. The data are made available through the cgiar consortium for spatial information cgiarcsi website in mosaiced 5 deg x 5 deg tiles in both arcinfo.
Mars mgs mola dem 463m v2 usgs astrogeology science center. The national map supports data download, digital and print versions of topographic maps, geospatial data services, and online viewing. Digital topographic map data exists for the united states in both vector points, lines and. In the context of academic research, publications are the most important metric for.
Webgis is where you can find all the leading information and resources for geographical information systems. Agency, or nima, as well as the participation of the german and italian space agencies, to generate a nearglobal digital elevation model dem. The mission used a xband mapping radar to measure the earths topography, built in. Download shapefile download kml additional information. Usgs srtm mission summary interferometry and srtm an overview nasa jpl srtm. The national mapnew data delivery homepage, advanced viewer, lidar visualization.
Shuttle radar topography mission srtm data have been enhanced to fill. The nasa shuttle radar topographic mission has provided digital elevation data dems for over 80% of the globe. Where i can download topographical and high resolution landsat. The shuttle radar topography mission cband data for north america and south america are available to the public. Usgs drg maps for the state of colorado are available here. Geological survey usgs with a horizontal grid spacing of 30 arc seconds approximately 900 meters. Nodata voids have been filled using interpolation algorithms, and the data has been clipped at the ocean shoreline. 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. Srtm elevation data can be downloaded from the united states geological survey s earthexplorer website. This paper presents the results of a global assessment of the unique. May, 2020 the elevations in this dem represent the topographic bareearth surface. Shuttle radar topographic mission digital elevation model srtm the shuttle radar topography mission srtm database contains global elevation data with 3 arcsecond 90 m spatial resolution. Contour map shows contour lines with relative space indicating the relative slope of the surface. The reference levels produced from gps elevations, and the topographic map is used to assess the vertical accuracy of srtm and astar dems in najran city, saudi arabia.
Srtm elevation data is an effort to provide digital elevation model dem at global scope with highest resolution 30 m. Geospatial reference datasets usgs projects in afghanistan. This collection was made possible by jared benedict of the libre map project and over 100 map liberators listed in the lower left. The lowest resolution was used by 4 with 250 meter dem resolution. Vertical accuracy assessment for srtm and aster digital. The dem represents ground surface topography, and excludes vegetation features. 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.
Incorporating the effect of dem resolution and accuracy for. Digital elevation shuttle radar topography mission srtm usgs. Shuttle radar topography mission produces a wealth of data. The national hydrography datasets, watershed boundary dataset, governmental boundary units, transportation, structures, elevation contours and geographic. Shuttle radar topographic mission digital elevation model. Srtm consisted of a specially modified radar system that flew onboard the space shuttle endeavour during an 11day mission in february of 2000. The elevation layers distributed with hydrosheds are based on a combination of the original srtm3 and dted1 elevation models of srtm for further specifications see 2. 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. Dec 12, 2016 download free elevation data dem from the usgs national map and nrcs geospatial data gateway duration. 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 arcsec 30meter data from the shuttle radar topography mission, with voids and data issues patched srtm 3 arcsec 90meter data, patched for the world outside the us, only srtm 90meter data is available from the usgs, so if you have a better source for the data, you should use that instead. Here is how to search and download the revelant data from usgs earthexplorer. Boxpoint current extent coordinates located point polygon. This digital elevation model dem is based on data from the mars orbiter laser altimeter mola. Incorporating the effect of dem resolution and accuracy. For 11 days in february 2000, the space shuttle endeavour conducted the shuttle radar topography mission srtm using cband and xband interferometric synthetic aperture radars to acquire topographic data over 80% of the earths land mass, creating the firstever nearglobal data set of land elevations.