In this exercise you will learn, how to download landsat satellite data. The global land cover facility glcf external link the university of marylands global land cover facility glcf offers thousands of landsat scenes and derived data. This is a simple search engine to search for digital elevation data from various sources on the internet. 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. There are also many online resources for landsat science products. The other data sets that are available at usgs earthexplorer are aerial imagery, avhrr, dem aster gmted210, gtopo30, gtopo30 hydro 1k, ifsar alaska, srtm, digital maps, global forest and land data, lidar, radar, vegetation data and etcthe below procedure can be used to download other data sets as well. Geological survey usgs is distributing elevation data from the shuttle radar topography mission srtm. The new data are available for download from the usgs eros data.
The data represent three nominal epochs, 2000, 2005 and 2010, compiled from the nasa usgs global land survey gls collection. Click download, a list of maps will appear with the size of data. Downloading srtm data geographic information systems stack. Srtm elevation data is an effort to provide digital elevation model dem at global scope with highest resolution 30 m. Srtm data was used to update the older usgs gtopo30 global dem. If youre interested in images and visualizations created from srtm data, go to. The shuttle radar topography mission srtm obtained elevation data on a nearglobal scale to generate the most complete highresolution digital topographic database of earth. Landsat tree cover data release nasas earth observing. Geological survey usgs earth resources observation and science eros center in sioux falls, south dakota. 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.
There is of course no difference in the row data, but glcf is also provides some processed satellite images. The glcf is also a convenient way to browse and download srtm data, in geotiff. The shuttle radar topography mission srtm collected elevation. Query and order satellite images, aerial photographs, and cartographic products through the u. With easyto use navigation tools, users can instantly view and download scenes. The svalbard sgs ground station is located at the svalsat facility in svalbard, norway. Is there any difference in the satellite images obtained. We ask you for some basic organizational and contact information to help us. The glcf is funded by nasas making earth system data records for use in research environments measures. 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. But heres a usgs earth explorer download guide to help you get started.
Because srtm acquired topography at the same time as the image data and the two are inherently registered, it was an easy matter to orthorectify the image data. We can visualize and presented the srtm data into various types. The earth science data interface is the glcfs web application for searching, browsing, and downloading data from their online holdings. Gaps in the original srtm dem dataset were filled with data digitized from contours on 1.
I am interested in usgs srtm data set for a region in liberia. For false color composit we need nn20, nn30,nn40 dataset. Earn 10 reputation in order to answer this question. It can be considered to be either an srtm data set enhanced with gtopo30, or as an upgrade to gtopo30. This tutorial will discuss how to download srtm elevation data directly in qgis using srtm downloader plugin. Lgs supports both the landsat 7 and landsat 8 missions. Digital object identifier doi shuttle radar topography mission srtm water body dataset digital object identifier doi number. In 2017, it was redesigned to address changing internet technologies. The landsat ground station lgs is located at the u. If you want to download srtm data, those data are available at the us geological surveys eros data center for download. The landsat vegetation continuous fields vcf tree cover layers contain estimates of the percentage of horizontal ground in each 30m pixel covered by woody vegetation greater than 5 meters in height. Landsat tm, etm, mss, ali, aster, elevation data srtm, modis image products, avhrr products, and other products. I just dont want to create a lot of temporary files that i have to delete later on. Sgs supports both the landsat 7 and landsat 8 missions.
The collection are located under the digital elevation category. The shadedrelief base is derived from shuttle radar topography mission srtm digital elevation model dem data having 85meter resolution. Funded primarily by nasa, glcf has been involved in numerous research projects encompassing the fields of remote sensing, geospatial ecology, and information systems. 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. Click on the srtm30 tile to download the digital elevation map dem from the place you select. The usgs earth explorer gives a quick and intuitive way to download free aerial and satellite imagery. The srtm radar image product provides the mean surface backscatter coefficients of the mapped areas.
Usgs ascii dem format is not particularly good as a data format because it is ascii. As has been said by others also, you should try for earth explorer and glcf sites for srtm data. The global land cover facility glcf, based at the university of maryland, college park, is pleased to announce the release of the landsat tree cover continuous fields dataset. The shuttle radar topography mission srtm is an international research effort that obtained 1arc second global digital elevation model 30 meters is available from the united states geological survey web site. In this video, we walk you through how to search and download landsat8 imagery for free from the usgs. The glcf develops and distributes remotely sensed satellite data and products concerned with land cover from the local to global scales. In order to download data from usgs earth explorer, here are the four steps. This fabulous resource is a must visit for anyone seeking small scale global coverage for large areas. The map is generated by choosing, for each pixel, the land cover classification with the highest overall confidence from 20012010, as described in broxton et al.
Thank you for reading this how to open srtm file on qgis tutorial. Reoional vcf tiles avhrr products global land cover re iona global land cover global continuous fields tree cover. Ifsar alaska, srtm, digital maps, global forest and land data, lidar, radar. Now anyone, anywhere, can download both srtm elevation data and a corresponding high resolution satellite image or land cover product from the glcfs large, free. Usually the srtm data can be downloaded from usgs earth explorer or nasa earth data server. The usgs archive contains the most complete and wellmaintained collection of landsat data.
Nasa shuttle radar topography mission v3 global 1 arc second hillshade image of the mt everest regionthe land processes distributed active archive center recently released additional tiles in the nasa srtm version 3. The effect of millennia of shifting ground on the island is readily apparent in this elevation image, created using data from the shuttle radar topography mission srtm. Both datasets can be downloaded from various data gateways. Free digital elevation model dem and free satellite data. In particular, the glcf develops and distributes remotely sensed. A new window will appear containing the list of maps. Users can retrieve free copies of elevation imagery through the glcfs easy online interface. The glcf provides srtm data in geotiff format after a short. About these data describe land cover type, and are based on 10 years 20012010 of collection 5. Global land cover facility glcf university of maryland. We will not distribute responses associated with you as an individual. This coincides with the newly processed areas released by the united states geological survey. Shuttle radar topography mission srtm nonvoid filled usgs.
How can i download srtm data of 30 m resolution for research in remote sensing. 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. Usgs earthexplorer global land cover facility glcf usgs global. In orbit downloader, click new and paste url set the location to download. The avhrr source imagery dates from april 1992 through march 1993. The global land cover facility glcf at the university of maryland, college park houses shuttle radar topography mission srtm data. This makes the file size several times larger than a wellconstructed binary format, and makes the file more difficult to machine process. Tiles srtm wrs2 tiles srtm gtop030 srtm gtop030 mosaic landsat produces forest cover tree cover modis products 320as, comoosites 16dav veaetation index vcf. Download and clip a portion of the srtm 30m dem giving bounding box as wgs84 coordinates. Since 2001, the usgs global visualization viewer glovis has been available to users for accessing remote sensing data. Under the data sets tab, select digital elevation srtm srtm 1arcsecond global. Srtm dem data is being housed on the usgs earth explorer.
I would like to read a gzipped geotiff from a server without downloading it. Srtm was designed to collect threedimensional measurements of the earths surface using a radar instrument that flew aboard the space shuttle endeavour in february 2000. Nasa shuttle radar topography mission srtm version 3. The new interface allows users to immediately download global land. But they come in 90 m resolution for most of the countries while 30 m resolution dem comes for some. It can be checked with image id that what level it was corrected. Under an agreement with the national aeronautics and space administration nasa and the department of defenses national geospatialintelligence agency nga, the u. Global land cover characterization glcc is a series of global land cover classification datasets that are based primarily on the unsupervised classification of 1km avhrr advanced very high resolution radiometer 10day ndvi normalized difference vegetation index composites. Srtm is a valuable data that is available for free the paid version also available with more up to date version. Usgs earthexplorer have four different data types to download, these are. The usgs earth explorer is quick and easy to download free landsat imagery. If youre interested in images and visualizations created from srtm data, go to the image product description page. Srtm did not produce data for the northernmost latitudes or antarctica. The srtm collections are located under the digital elevation category.
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