There are numerous elevation datasets with global or nearly global coverage, but by far the most significant is srtm. The aster gdem is the most uptodate, high spatial resolution, complete digital topographic data set of the earth available at no cost to the public, covering. Free aster l1al1b data, source of stereo pairs for aster dems and a rich multi spectral dataset. You will receive an email when the data are available for retrieval and you then use the usgs bulk download. In this video, i have clearly shown the steps required to download aster gdem v3 from earthdata. The aster gdem is available at no charge to users worldwide via electronic download from japan space. The aster advanced spaceborne thermal emission and reflection radiometer instrument was built by meti and launched onboard nasa s terra spacecraft in. Free 30meterresolution elevation data for most of the. Advanced spaceborne thermal emission and reflection radiometer. The original raw open data from us geological survey srtm 1arc, nasa and meti aster gdem and european union eudem has been modified. Hi riccardo, thanks for your fast answer much appreciated because i spent about 2 hours tonight trying to figure out why my hillshade from this aster data looks so terriblei noticed exactly the noise that you were talking about, but i thought i might be doing smth wrong and i could filter the noise somehowbut i guess i can give up then. Because gdem covered a greater area covered with finer spatial resolution, it has the potential to create better analyses. Eudem is a digital surface model dsm of eea member and cooperating countries representing the first surface as illuminated by the sensors.
The development of the aster gdem data products is a collaborative effort between national aeronautics and. Aster gdem global digital elevation model has been produced as a joint activity of the ministry of economy, trade, and industry meti of japan and the united states national aeronautics and space administration nasa. Aster gdem global elevation data center for earth observation. The aster gdem is available at no charge to users worldwide via electronic download from japan space systems and from nasas land processes distributed active archive center lp daac. Free digital elevation model dem and free satellite data. Perhaps i am biased, but i still believe that for many areas, the best available data. Nasa and meti release aster digital elevation model. Query and order satellite images, aerial photographs, and cartographic products through the u. Coverage at 3 arc seconds is now global, and unlike srtm and aster gdem, there are no serious voids or artifacts. The data is projected in a geographic latlong projection, with the wgs84 horizontal datum and the egm96 vertical datum.
Compared to gdem v1, the development of v2 mainly focusses on the incorporation of newer aster data from september 2008 until october 2010, valued at 260. How to download aster global dem version 3 from earthdata. The full data set can be downloaded from the links above. It is not recognizing any name i try that is associated with the aster data set. 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. The gdem was created by processing and stereocorrelating the 1. Space images asters global digital elevation model gdem. Aster gdem global elevation data the science teams at the nasa jet propulsion lab jpl and japans ministry of economy, trade, and industry meti used the aster sensor onboard the terra satellite to produce 30 m resolution elevation data. It is a hybrid product based on srtm and aster gdem data fused by a weighted averaging approach. Does anyone know where to download a free digital elevation model of southern england to work with in qgis. Earth explorer can be used to download the data, it is under the digital elevation category. The ministry of economy, trade, and industry meti of japan and the united states national aeronautics and space administration nasa jointly announced the release of the advanced spaceborne thermal emission and reflection radiometer aster global digital elevation model version 3 gdem 003, and the aster water body dataset astwbd on.
In february 2000 special mission of endeavour spaceshuttle started. All swir data collected after 1 april 2008 has been marked as unusable. Aster gdem and astwbd tiles may be downloaded directly from. Then we click on the get data link, which will take us to the welcome to wist page. Yet we havent done the math and this noise might result from our blackwhite color stretch. The aster global digital elevation model gdem version 3 astgtm provides a global digital. I merged this data with the 3 arcsecond version of the global srtm elevation data. Aster global dem version 3, and new aster water body. Aster global digital elevation model netcdf v003 data. This data replaces a previously released version 1 data set which was much lower quality and therefore less usable. Aster gdem global digital elevation model has been produced as a joint activity of the.
The aster global digital elevation model version 2 gdem v2 is also a free dem that covers land surfaces between 83 deg. Downloading and clipping aster dem in global mapper software. It has not the greatest resolution, approximately 1 km and split into 33 tiles available in usgs dem file format. It is a digital elevation model for whole world created and distributed by usgs. The correlation was conducted using spss 11 software. Digital elevation data with srtm voids filled using. Produced using copernicus data and information funded by the european union eudem layers. Nasa and japans ministry of economy, trade and industry meti released the advanced spaceborne thermal emission and reflection radiometer aster global digital elevation model gdem to the worldwide public on june 29, 2009. The aster scene was acquired november 20, 2001, and is centered near 28. Aster is an instrument on nasas terra satellite, and stereo imagery from this sensor was processed to generate a nearly global digitalelevation model between 83n and 83s latitudes with 30meter postings.
So the aster data fills holes in the srtm data and extends the. Srtm shuttle radar topography mission dem is unique product which was produced by nasa and nga in cooperation with german and italian space agency. I created a global version of the aster data at a 5 arcsecond resolution that extends from 80 north lat to 80 south lat. In the top of the page click on enter wist, and go to the data selection page. Which dem data is better for elevation mapping, aster or. Aster science team released version 3 of the global dem gdem. Aster gdem was created by stacking all individual cloudmasked scene dems and noncloudmasked scene dems, then applying various algorithms to remove abnormal data 1, 2, 3. I am writing a script to import a large set of glacier outlines along with the aster gdem dataset. The aim of this mission was to obtain elevation data on a. Source for canadian landsat 7 and many other types of gis data. The aster gdem greyscale shaded relief layer above shows surface elevation as shaded relief in shades of grey. Asters global digital elevation model nasa solar system.
In october 2011 the japanese meti and the us nasa released a new global elevation data set the aster gdem v2. The data are posted on a 1 arcsecond approximately 30m at the equator grid and referenced to the 1984 world geodetic system wgs84 1996 earth gravitational model egm96 geoid. To upgrade your browser, click on the icons below to go to the download page. The aster global digital elevation model aster gdem version 3 v3 was generated using 1,880,306 level1a scenes acquired between march 1, 2000 and november 30, 20. In order to use earthdata search, you must upgrade your web browser. However, the srtms true effective resolution is less than the 1 data collected worldwide and released in the united states guth. How to download aster dem 30m data for free duration.
The aster global digital elevation model gdem is available at no charge to users worldwide via electronic download. All products are available to all users at no cost. Dear sir aster is a 15 m resolution data and srtm is 3 arc second 90m so certainly aster is better, we have developed set methodoology and was quite successful. On june 29, 2009, nasa and the ministry of economy, trade, and industry meti of japan released a global digital elevation model gdem to users worldwide at no charge as a contribution to the global earth observing system of systems meti and nasa, 2011. Elevation data provides height above the sea level in meters for every single place in the world, measured for regions of approximately 30x30 meters. How to download 30m and 90m resolution srtm digital elevation model data from opentopography. The 2009 and 2011 releases of a global aster gdem dataset, with 1 postings, may also have been noticed. Access to data is based on a principle of full, open and free access as established by the copernicus data. This view looking towards the northwest was created by draping an aster simulated natural color image over digital topography from the aster global digital elevation model gdem data set.
Aster gdem and free aster l1al1b data see the nasa wist website. The aster gdem is distributed as geographic tagged image file format geotiff files with geographic coordinates latitude, longitude. Release of aster gdem version 3 06 august, 2019 the united states national aeronautics and space administration nasa and the ministry of economy, trade, and industry meti of japan today jointly released version 3 of the advanced spaceborne thermal emission and reflection radiometer aster global digital elevation model gdem the aster gdem is available at no charge to users worldwide. As you might have seen, the data in the aster gdem looks a little bit noisy. On the default palette, white indicates the highest elevations, then brown, yellow and greens indicate low.
Vertical accuracy assessment for srtm and aster digital. Aster global dem the aster instrument was built by japans ministry of economy, trade and industry meti and launched aboard nasas terra spacecraft in. The srtm color index above and aster gdem color index layers show land elevation around the world, measured in meters. If you try to download more than 100 tiles, the first 100 tiles are.
A free dataset created by combining data from many sources, including gapfilling srtm, and sheets of contour maps. The first version of the aster gdem, released in june 2009, was generated using stereopair. Aster gdem global digital elevation model v002 select search for granules now begins the tedious part where there are over 22,000 aster gdem tiles that cover the globe however, the website only list 400 per page where there is an add all on page button but no add all option i. In order to download the data, we need to be logged in the system. Aster gdem, a dem data which is acquired by a satelliteborne sensor aster to cover all the land on earth. The data can be downloaded from the usgs earthexplorer website. Version 3 of the aster global digital elevation model gdem provides. More info including download links can be found here. As of 2 april 2016, the entire catalogue of aster image data became publicly available online at no cost. Lp daac nasa and meti release aster global dem version 3.
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