Traditionally, most usgs data was on printed maps, 7. They had 10m and 30m dem data the last time i checked, plus a lot of other data too. Each quadrilateral map quad map has a unique name, which is useful for locating and referencing the data. See free digital elevation model dem and free satellite imagery download links for a discussion of the transition away from the dem format by usgs and links to sites that support the ongoing demand for elevation data in the dem format. Downloading free usgs dem data digital elevation model for use.
Free satellite data, satellite imagery, digital elevation models dems, topographic maps and free software links. The usgs earth explorer gives a quick and intuitive way to download free aerial and satellite imagery. A primer on downloading data usgs water data for the. How to download aster global dem version 3 from earthdata. Our data and information is presented both spatially and geographically including the national map, earth explorer, glovis, landsatlook, and much more. Download 30meter srtm data easily with this point and. Where can i get recent free dem data other than usgs data. Click here to use our web map to select datasets for download. Elevation data providing height above the sea level in meters for every single place in the. And, personally, i think their website is easier to navigate than the usgs. This web application enables the investigation into a collection of arctic dems. These digital elevation model dem data files are produced by the u. The distribution function was assumed to some extent by commercial concerns, and intrasearch mapmart has a nice mapbased interface that provides up to ten free quadrangles per batch in exchange for personal information. The geospatial team of grand canyon monitoring and research center maintains an enterprise.
Free digital elevation model dem and free satellite data. Click the how to link at the top of the viewer for detailed instructions on how to find and download data. Srtm elevation data is an effort to provide digital elevation model dem at global scope with highest resolution 30 m. Google translate is a free, automated service that relies on data and technology to provide its translations. This collection of r and python scripts can be used to download data and perform basic data processing functions such as georeferencing, reprojecting, converting, and reformatting data. In addition to these bare earth digital elevation model dem data, the lidar point data that these dems were created from, are also available. Scripts are available in python andor r and each have a readme that provides additional information. We can verify that the domain is for sale over the phone, help you with. 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. Dems are also available from the united states geological sruvey usgs. As everybody is aware that z or elevation values are expensive to obtain, so i have listed few places on internet where you can download the world dem data for free. Dem tiles are available for free download through many state and regional clearinghouses. These are primarily created by the polar geospatial center covering the majority of the arctic.
It appears that the global 1arcsecond 30m srtm digital elevation model is now being made publicly available. The usgs digital elevation model dem data files are digital representations of elevation information in a raster or grid form. Usgs national elevation dataset many florida lidar projects have contributed to the available 19 arc second data. Lidar data are available through the national map download client.
Nm rgis new mexico resource geographic information. Translations cannot be guaranteed as exact or without the inclusion of incorrect or inappropriate language. They allow you to pick by state and county and then download data for free. You can also derive dems from aerial photographs and satellites. The image archive program maintained by the earth data analysis center at the university of new mexico hosts the largest collection of historical aerial photography data for new mexico and the us southwest. The library is an important resource for analyzing imaging spectrometer data, also known as hyperspectral. The usgs spectral library is a reference data base containing reflectance spectra, and associated sample documentation, that can be used to identify minerals, determine mineral chemistry, discriminate between vegetation species, and detect hydrocarbons and contaminants in the environment. For cartosat dem you can follow this link you can also derive dems from aerial photographs and satellites. Usgs digital elevation models dem switching to new distribution format. Arranged in tiles that are 1 degree latitude by 1 degree longitude, shuttle radar topography mission srtm data was acquired over a 11day mission in february 2000.
Usgs srtm was declared public domain for the older version, now. National land cover database nlcd data can be downloaded at the. The 3dem application produces three dimensional terrain scenes and flyby animations from a wide variety of freely available data sources including. If you are going to performing analysis on the landsat data, the level 1 geotiff data product is probably the one youre after, which will be the largest file size. Elevation data provides height above the sea level in meters for every single place in the world, measured for regions of approximately 30x30 meters. This tutorial will discuss how to download srtm elevation data directly in qgis using srtm downloader plugin. Partnership opportunities for the acquisition of lidar data issued. Srtm dem data is being housed on the usgs earth explorer. Lidar point cloud data is also available over many areas of the us. The usgs offers a central web site for downloading or ordering digital elevation data in geographic and nad83 formats via the national map.
Format description for dem usgs digital elevation model dem, representing. The national elevation dataset ned is a seamless raster product primarily derived from usgs 10 and 30meter digital elevation models dems. The land processes distributed active archive center lp daac is responsible for the archive and distribution of the nasa making earth system data records for use in research environments version srtm, which includes the global 1 arc second 30 meter product. Click on the srtm30 tile to download the digital elevation map dem from the place you select. Download dems for the state of ohio can be downloaded for free. Nasa shuttle radar topography mission srtm datasets result from a collaborative effort by the national aeronautics and space. Opendem the portal for sharing free digital elevation models and xyz height datasets download srtm data the data could be downloaded under the open database license. Laz in cloud when exporting lidar data urls to text from the cart the user can specify whether to include files in laz only, las only or both formats if both types are present in the cart. Usually the srtm data can be downloaded from usgs earth explorer or nasa earth data server. Charttiff offers usgs topo maps, aerial photos, elevation. Dems consist of a sampled array of elevations for a number of ground positions at regularly spaced intervals. Light detection and ranging lidar is a technology similar to radar that can be used to create highresolution digital elevation models dems with vertical accuracy as good as 10 cm. For cartosat dem you can follow this link downloadindex.
The spatial reference used for tiles of the onemeter dem within the conterminous. The usgs envisioned this dataset as a vehicle to allow users to focus on analysis rather than data preparation. Downloading free usgs dem data digital elevation model for use in a gis. Opendem the portal for sharing free digital elevation models and xyz height datasets. Hydrosheds is a mapping product that provides hydrographic information for regional and globalscale applications in a consistent format. Usgs ascii dem format is not particularly good as a data format because it is ascii. Digital elevation models dem nc state university libraries. Staged productsthe topographic maps and geographical information system gis data provided in the national map are pregenerated into downloadable. Digital elevation model dem format library of congress. The collection also includes space shuttle imagery, satellite. A brief walkthrough of the process for finding and downloading american elevation data so that you can then use it in a geographic information. 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 provided maps are not for purchase or for download. Noaas digital coast provides many data download options both in terms of projection and datums, as well as file formats, cell sizes, and data classes.
It offers a suite of georeferenced data sets vector and raster at various scales, including river networks, watershed boundaries, drainage. National land cover database nlcd data can be downloaded at the mrlc website. In the summer of 2001, the usgs suddenly halted its free distribution of sdts dem files via ftp. How can i download srtm data of 30 m resolution for research in remote sensing. The national mapnew data delivery homepage, advanced viewer, lidar visualization. Department of agriculture usda data distribution web site where dem and ned data. This makes the file size several times larger than a well. If you cant download the file, contact me right away so we can. Charttiff offers digital maps, usgs and naip aerial photos, ned and dem elevation data in various projections and file formats.
The topographic maps and geographical information system gis data provided in the national map are pregenerated into downloadable products often available in multiple formats. Usgs digital elevation model ascii dem files usgs spatial data transfer standard sdts dem files nasa shuttle radar topography mission srtm files lidar point cloud las files usgs. Surface terrain of indianaa digital elevation model usgs. Ned data are available from the national map viewer as 1 arcsecond approximately 30 meters for the conus, and at and 19 arcseconds approximately 10 and 3 meters, respectively for parts of the. These data are available for custom download at the link provided in the url section of this metadata record. Derek watkins has created a simple and easy to use interface for downloading 30meter srtm data. Geological survey broad agency announcement for 3d elevation program released.
This data was collected during the shuttle radar topography mission srtm and. They created the ned from a variety of digital elevation model sources that had various horizontal datums, map projections, elevation units, and quality. More and more dem data sets are published under free licenses or as public domain. Unfortunately, many download interfaces wont produce a map of these quads. Through inspire in europe more and more will follow. Digital elevation models dems, orthoimagery, and land cover. Usgs is a primary source of geographic information systems gis data. The original raw open data from us geological survey srtm 1arc, nasa and meti aster gdem and european union eudem has been modified, adapted and overlaid to fill the gaps and provide a. Click here to download them from a table sorted by quadrangle name. Digital elevation model dem is a raster image that holds z values, it is used widely during the analysis process where surface height value are important.