Usgs earthexplorer global land cover facility glcf usgs global. The distribution policy of the glcf is to provide imagery and products for free whenever possible. Landsat data have been used to monitor water quality, glacier recession, sea ice movement, invasive species encroachment, coral reef health, land use change, deforestation rates and population growth. Click download, a list of maps will appear with the size of data. The data could be visualised in 3d with the virtual terrain software. The data are available for download via earthdata search, the lp daac data pool and the global data explorer. 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 directly viewable in a browser. We would like to show you a description here but the site wont allow us. 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. In this video, we walk you through how to search and download landsat8 imagery for free from the usgs. I read about the new version of the digital elevation model at 30 meters srtm 30 meters, but i can not find from were i can download it. You can download and clip a portion of the srtm 30m dem with one command with the elevation python command line tool. Funded primarily by nasa, glcf has been involved in numerous research projects encompassing the fields of remote sensing, geospatial ecology, and information systems. There are also many online resources for landsat science products.
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. Umd glcf global inventory modeling and mapping studies glcf global inventory modeling and mapping studies from umd. I would recommend you to visit the eartexplorer as your first place to obtain the digital elevation model data. The provided maps are not for purchase or for download.
How to obtain srtm data for a specific area for free. Glcf global inventory modeling and mapping studies from umd. Under the data sets tab, select digital elevation srtm srtm 1arcsecond global. The north carolina sample data set for the grass gis book we have prepared a new, modern sample gis data set. The glcf is funded by nasas making earth system data records for use in research environments measures. 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.
List of important sites to download free satellite images and gis data list of gis topics for m. The data were classified using a decision tree classification. So the aster data fills holes in the srtm data and extends the. 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.
The collections are located under the land cover products data set. Srtm dem data is being housed on the usgs earth explorer. How to download satellite images free via glcf the global land. Free digital elevation model dem and free satellite data. But heres a usgs earth explorer download guide to help you get started. These guides are intended to help users better understand files and how they should be handled before operating. 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. Users can retrieve free copies of elevation imagery through the glcfs easy online interface. The announcement was made at the united nations heads of state climate summit in new york. The purpose of this policy is to enable as much use of quality earth science datasets as possible. Landsat tm, etm, mss, ali, aster, elevation data srtm, modis image products, avhrr products, and other products. 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. Digital object identifier doi global land cover characterization glcc digital object identifier doi number.
Free 30meterresolution elevation data for most of the. Information on srtm data shuttle radar topography mission are available at. I created a global version of the aster data at a 5 arcsecond resolution that extends from 80 north lat to 80 south lat. There is a new, 30 meters resolution srtm dtm coming out. The glcf used to have the website which allowed you to download srtm data although im not sure if its still maintained. This data set is a comprehensive collection of raster, vector and imagery data covering parts of north carolina nc, dataset download read more. Ifsar alaska, srtm, digital maps, global forest and land data, lidar. For false color composit we need nn20, nn30,nn40 dataset. In this video, i have included the steps required to download landsat image from the global land cover facilityglcf. Srtmdem data to map tropical dry forest fragments and agricultural land cover types in the rivas province of southwestern nicaragua. Download landsat imagery from global land cover facilityglcf. Usgs ascii dem format is not particularly good as a data format because it is ascii. If you want to download srtm data, those data are available at the us geological surveys eros data center for download.
The majority of users accessing glcf datasets come from the following communities. To search for data navigate to the global land cover facilty and select download data on the right hand side of the webpage. Download srtm data the data could be downloaded under the open database license. The shuttle radar topography mission srtm obtained elevation data on a nearglobal scale to generate the most complete highresolution digital. Im posting about the university of marylands global land cover facility, a massive archive terabytes and growing of various kinds of satellite imagery and derived data, even though i suspect many readers of this blog are already familiar with it. The usgs archive contains the most complete and wellmaintained collection of landsat data.
Opendem the portal for sharing free digital elevation models and xyz height datasets. Srtm 90m 3 arcsecond elevation can be browsed and downloaded from the. List of important sites to download free satellite images. For further information, contact lp daac user services. Data library umd glcf global inventory modeling and mapping. The data are classified and colored according to information from glcf.
If you want to download srtm data, those data are available at the us. This is the third release in the series providing access to additional nasa srtm version 3. Nasa shuttle radar topography mission srtm version 3. Landsat tree cover data release nasas earth observing. In orbit downloader, click new and paste url set the location to download. But they come in 90 m resolution for most of the countries while. Free satellite imagery and derived data from the glcf. The glcf is also a convenient way to browse and download srtm data. 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. Most of the data is freely downloadable, accessible through a browserbased interface, and georeferenced for use in gis and satellite image. Overview, methodology, and data specifications access data.
D project land use and land cover analysis and change detection. The global land cover facility glcf is an operational research and development project housed in the department of geographical sciences, within the college or behavioral and social sciences, at the university of maryland. As stated on the nasa jpl official page, the next release is planned for later in 2014, and it is expected to include all of south america plus north. I merged this data with the 3 arcsecond version of the global srtm elevation data. A new window will appear containing the list of maps. Primary data and products available at the glcf are free to anyone via ftp. This makes the file size several times larger than a well. Srtm srtm srtm data decree tiles wrs2 tiles gtop030 gtop030 mosaic landsat products forest cover. The usgs earth explorer gives a quick and intuitive way to download free aerial and satellite imagery. The gaps of the dataset are now filled and you can download this great resource for free. Landsat 7 beta product for south america available for download off of glcf site landsat 7 beta product for south america available for download off of glcf site. Forest and agricultural lands are concentrated across the narrow rivas isthmus, between lake nicaragua and the pacific coast.
Roa presented on a rapid assessment of landslide susceptibility and hazard using landsat imagery and srtm data. But they come in 90 m resolution for most of the countries while 30 m. As an alternative i would like to point to another resource for elevation data. Landsat has also helped to assess damage from natural disasters such as fires, floods, and tsunamis, and subsequently, plan disaster relief and. And by looking on the calendar we checked back again. Depends on the spatial resolution but for a lot of applications srtm data will work well. As has been said by others also, you should try for earth explorer and glcf sites for srtm data. Downloading srtm data geographic information systems stack. Comparison for two regions in crete, greece article pdf available in international journal of remote sensing 2721. The global land cover facility glcf external link the university of. Global land cover facility glcf university of maryland. Free satellite data, satellite imagery, digital elevation models dems, topographic maps and free software links. The global land cover facility glcf at the university of maryland, college park houses shuttle radar topography mission srtm data. In this exercise you will learn, how to download landsat satellite data.
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