The shuttle radar topography mission srtm provides for the first time a nearglobal highresolution digital elevation model dem with great advantages of homogeneous quality and free availability. Nasa shuttle radar topography mission srtm3 global 3 arcsecond number. The usgs acquires bareearth elevation source data through. Opentopographys suite of webbased processing tools are also available to process these data into custom dems and visualization. The procedure is somewhat complex but should yield proper results, eventually. If you want to download srtm data, those data are available at the us geological surveys eros data center for download. If youre interested in images and visualizations created from srtm data, go to the image product description page. The second type, called a digital elevation model dem, consists of a sampled array of elevations for a number of ground positions at regularly spaced intervals. The shadedrelief base is derived from shuttle radar topography mission srtm digital elevation model dem data having 85meter resolution. Download various data including elevation from the usgs. Usgs eros archive digital elevation srtm coverage maps. It is an open standard, and is used throughout the world. Digital elevation shuttle radar topography mission srtm usgs.
The standard dem consists of a regular array of elevations cast on a designated coordinate projection system. Usgs earth resources observation and science eros center archive spans from 1937 aerial photographs to millions of satellite images of the earths surface, starting with the original earth orbits in the 1960s and first landsat satellite in 1972, to our current hourly additions of satellite images. The grid cells are spaced at regular intervals along south to north profiles that are ordered from west to east. The links are connected directly to the nasa site courtesy of nasangausgs. Nasa shuttle radar topography mission srtm3 global 3 arcsecond. The ned is a seamless raster dataset developed by merging the highestresolution, bestquality 1. We will not distribute responses associated with you as an individual. Maps s are digital line graphs that are vector based maps used to represent roads and streams. Topographic data are information about the elevation of the surface of the earth. Both of these formats are available from various locations on the web. Ive written a python script that will convert the usgs dlg native i. The national aeronautics and space administration nasa. 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.
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. Whereas dems are raster s based maps that consists of a series of grid squares across a map represented in some cases elevation. Parsing usgs bil digital elevation models in python. Geological survey are maps with grids of values representing elevation changes in an area. The dem data are stored as a series of profiles in which the spacing of the elevations along and between each profile is in regular whole number intervals. The national mapnew data delivery homepage, advanced viewer, lidar visualization. One of these, bil, is a simple binary raster file, which can be read quite easily in python in this, ill base this on code from a previous post. Srtm data available through the usgs earthexplorer are nga srtm version 2. Agency, or nima, as well as the participation of the german and italian space agencies, to generate a nearglobal digital elevation model dem. Boxpoint current extent coordinates located point polygon. Geologic and mineral resource map of afghanistan usgs.
The highest resolution dem data set for the entire world excluding bathymetry is the 30 arcsecond gtopo30 dem, which has a nominal ground resolution of 1 km. Eros registration system ers upon success, an email containing a link for resetting your password will be sent to your contact email address. Hgt format contained anomalies, such as spikes or missing elevations. If you use the national map seamless server its possible to select a region and download a digital elevation model in a number of formats. It has been superseded by the usgss own sdts format but the format remains popular due to large numbers of legacy files, selfcontainment, relatively simple field structure and broad. The usgs dem standard is a geospatial file format developed by the united states geological survey for storing a rasterbased digital elevation model. Done the srtmgrid file will now process your hgt files to. Our online converter of srtm hgt format to format srtm to usgsdem is fast and easy to use tool for both individual and batch conversions. The files and datasets listed below may be freely downloaded and used with our compliments. Download free elevation data dem from the usgs national map and nrcs geospatial data gateway duration. Jplnasa version 3 srtm global elevation data provide global coverage of completely void filled data at resolutions of 3 arcseconds approximately 90 meters and 1 arcsecond approximately30 meters.
Elevation contours and spot elevations usgs dlg, elevation, summary data. In 2017, it was redesigned to address changing internet technologies. Webgis geographic information systems resource gis. Take a jaunt on the wild side as nasa jpl shuttle radar topography mission conducts an aerial safari of africa varied topography. The shuttle radar topography mission produced the first detailed elevation model of most of the world.
Type show wo and verify you are in the right location. The 3dep data holdings serve as the elevation layer of the national map, and provide foundational elevation information for earth. Usgs geographic data download center free dem, dlg, and lulc data. It can be considered to be either an srtm data set enhanced with gtopo30, or as an upgrade to gtopo30. 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. Nasa shuttle radar topography mission srtm3 global 30 arcsecond. Digital elevation model dem is the terminology adopted by the usgs to describe terrain elevation data sets in a digital raster form. The corresponding water body data have also been updated. Since 2001, the usgs global visualization viewer glovis has been available to users for accessing remote sensing data. Too many points 441 out of 441 failed to transform. Geological survey usgs produces five primary types of elevation data. Seperti kita ketahui, data srtmdem sangat dibutuhkan untuk membuat peta dasar atau peta topografi.
Srtm 1 arcsecond dem data are also available for the united states. These high resolution topographic data are available as point clouds for download. With easyto use navigation tools, users can instantly view and download scenes. This data was collected during the shuttle radar topography mission srtm and contains global coverage from 56 degrees south latitude to 60 degrees north latitude in 1 by 1 degree blocks with an approximate resolution of 90 by 90 meters. The usgs global data explorer has version 2 of the 30 m aster global demapparently its an improvement over version 1, but in my opinion its still pretty crummy. May, 2020 this is a tiled collection of the 3d elevation program 3dep and is one meter resolution. Comparison of dems derived from usgs dlg, srtm, a statewide photogrammetry program, aster gdem and lidar.
Data set, category, summary data, date created, download, web service. For easier distribution, gtopo30 has been divided into tiles which can be selected from the map shown above. Emission and reflection aster global dem v2, to a lidar dem. Srtm3 data are among the best global elevation data, with a grid resolution of approximately 90 m. The original srtm shuttle radar topography mission topographic data in the. Video ini berisi tata tacatutorial bagaimana caranya mendownload data srtmdem dari situs usgs. National geospatialintelligence agency nga originator. Datasets listed below are currently available via the usgs 3d elevation program. Download and clip a portion of the srtm 30m dem giving bounding box as wgs84 coordinates.
The third type is land use and land cover digital data which provides information on nine major classes of land use such as urban, agricultural, or forest as well as associated map. Gtopo30 was derived from several raster and vector sources of topographic information. Usgs digital elevation models dems are arrays of regularly spaced elevation values referenced horizontally either to a universal transverse mercator utm projection or to a geographic coordinate system. Srtm and ned data is offered in gridfloat, arcgrid, and tiff formats. Nasa shuttle radar topography mission srtm3 global 3 arcsecond subsampled. In many areas srtm data provide the only topographic data set available. I have tested it on just one dlg file, but the resultant dxf output seems to line up well with the rail lines on osm. Dlg is a large scale us vector map, digitized from the usgs 1. Optional format is available for download through the usgs earth explorer.
If the coordinate system of your input data is not present or not recognized. Users should be aware that these data are intended for use with a geographic information system gis or other special application software, and are not. One of its distribution formats is sdts which transdem cannot read directly. Utm nad27 elevation srtm 30meter, elevation, summary data. Nasa shuttle radar topography mission srtm3 water body shapefiles and raster. The usgs seamless server enables a user to view and download many geospatial data layers including. Video ini berisi tata tacatutorial bagaimana caranya mendownload data srtm dem dari situs usgs. The time required to complete this information collection is estimated to average 2 minutes per response.
Geological survey usgs with a horizontal grid spacing of 30 arc seconds approximately 1 kilometer. Note that all values in this example are for demonstration purposes only. Digital elevation model elevation data on this cdrom are from the usgs national elevation dataset ned. Cgiarcsi geoportal srtm version 4 free 90m dem data. Comparison of dems derived from usgs dlg, srtm, a statewide. Nasa shuttle radar topography mission srtm3 water body shapefiles and. Gaps in the original srtm dem dataset were filled with data digitized from contours on 1.
Converter also supports more than 90 others vector and rasters giscad formats and more than 3 000 coordinate reference systems. Shuttle radar topography mission produces a wealth of data. Transdem forum view topic how to use usgs dlg vector data. Seperti kita ketahui, data srtm dem sangat dibutuhkan untuk membuat peta dasar atau peta topografi. They also have the 30 m and 90 m shuttle radar topography mission dem and the 1 km gtopo30 dem. Shuttle radar topography mission data were used to generate digital elevation data with a resolution of 1 arcsecond for the united states and 3 arcseconds for global coverage.
There used to be a usgs map finder until they took it offline. The finished grade data has most of these anomalies removed by the usgs. New zealand dems digital elevation model, raster and shaded relief. Gtopo30 is a global digital elevation model dem with a horizontal grid spacing of 30 arc seconds approximately 1 kilometer. Usgs eros archive digital line graphs dlgs large scale. I know this thread is a couple of years old, so i dont know how much use this will be. Gtopo30 is a global digital elevation model dem produced by the u. Topography mission srtm, a statewide photogrammetric dem. The g3dgmv program was designed as a free viewer for digital elevation model dem and digital line graphs dlg maps.
1280 297 543 920 969 1263 1583 661 1122 530 734 298 1490 156 1255 923 1203 1615 134 386 1351 511 858 687 1483 166 47 159