Topographic maps digital raster graphics information. 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. This collection was made possible by jared benedict of the libre map project and over 100 map liberators listed in the lower lefthand column of this page. Jul 01, 2009 download aster gdem by jorge o n monday 29 th of june of 2009, nasa and japans ministry of economy, trade and industry, released the global digital elevation model gdem created from advanced spaceborne thermal emission and reflection radiometer aster data. N new this is the first usgs drg made for this quadrangle. We ask you for some basic organizational and contact information to help us interpret the results and, if needed, to contact you for clarification. Free satellite data, satellite imagery, digital elevation models dems, topographic maps and free software links. Assessment of aster gdem performance by comparing with srtm and icesatglas data in central china. R replace drg is a replacement, made from the same map as a previous drg, to correct technical errors or upgrade the visual quality. Download aster dem digital elevation model for free from usgs how to download dem data from usgs download free dem digital elevation model download how to download dem digital elevation model usgs. 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.
The aster gdem covers land surfaces between 83n and 83s and is comprised of 22,702 tiles. Global map 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. Please take a minute to read through the new wiki page. Aster global digital elevation model aster gdem easytouse topographic information of the global terrain the ministry of economy, trade and industry of japan meti and the national aeronautics and space administration nasa are collaborating on a project to develop aster global digital elevation model aster gdem, a dem data which is acquired by a satelliteborne sensor aster to. Download aster dem digital elevation model for free from usgs. Elevation data provides height above the sea level in meters for every single place in the world, measured for regions of approximately 30x30 meters. The usgs digital raster graphics for the long valley caldera region for this report were obtained from the california spatial information library casil in albers projection.
Usgs drg production specifications are available on request from the national mapping division and midcontinent mapping center by contacting the. The aster gdem is distributed as geographic tagged image file format geotiff files with geographic coordinates latitude, longitude. Assessment of aster gdem performance by comparing with srtm. Usgs national map orthoimagery map services transition and. Usgs digital topographic maps drgs indices usgs topographic map index. This is a tiled collection of the 3d elevation program 3dep and is one meter resolution. We will not distribute responses associated with you as an individual. Aster global dem version 3, and new aster water body dataset. Validation of the aster global digital elevation model gdem. Gdem and srtm using a precision of integer meters leads to the poor correlation r0. Usgs 24k drg indices the usgs topographic map tile indices can be used to determine the 7.
If you dont find what you need jump in and submit new content. The starting acquisition date the image was acquired. 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 advanced spaceborne thermal emission and reflection radiometer data has only one resolution. The county coverage files are extremely large 25100 meg and may be frustrating to download for those with a slow data connection. O n monday 29 th of june of 2009, nasa and japans ministry of economy, trade and industry, released the global digital elevation model gdem created from advanced spaceborne thermal emission and reflection radiometer aster data. This flag identifies whether or not the entity has a browse image available with it. Pdf assessment of aster gdem performance by comparing. For questions concerning single quad drgs or drgs in other projections contact the tva or usgs. The 3dep data holdings serve as the elevation layer of the national map, and provide foundational elevation information for earth science studies and mapping applications in. Query and order satellite images, aerial photographs, and cartographic products through the u. The data are posted on a 1 arcsecond approximately 30m at the equator grid and referenced to the 1984 world geodetic system. Is there are any place i can download the whole thing from.
A browse image provides the user with a visual overview of an inventory item. In october 2011, nasa released the new aster gdem global dataset 30m and i have been wanting to get my hands on it. Aster scene elevation models are used to mosaic the land surface with the aid of. The aster global digital elevation model version 2 gdem v2 was evaluated over the full extent of the conterminous united states conus in a manner similar to the validation conducted for the original gdem version 1 in 2009. View all data get started with data instrument specifications collection overviews workflow examples search data catalog. Dear friends, i was trying to extract elevation value from a aster gdem data using arcmap 9. The only problem is that it takes forever to download and i do not feel like drawing tiny little boxes for the entire world. Open the product list by clicking results next to the product count. The image inside the map neatline is georeferenced to the surface of the earth. Features include temporal comparison functionality, export customizable graphic file, generate and download a video animation of the oldest and newest images displayed in the viewer, to name a few. Aster global dem version 3, and new aster water body. 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. 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.
Validation of the aster global digital elevation model. Transformations are checked on selected drgs by comparing the positions of well defined points, such as utm grid intersections in the graphic product, with the corresponding image points in the drg. Chrysoulakis university of athens, department of geology and geoenvironment, remote sensing. Usgs ascii dem format is not particularly good as a data format because it is ascii. One characteristic of gdem v2, specifically the number of aster scenes stereo pairs used to derive an elevation for a. Free digital elevation model dem and free satellite data download links. Terralook is a collection of satellite images of areas of conservation interest, packaged with a simpletouse toolset to find and view them. The aster advanced spaceborne thermal emission and reflection radiometer instrument was built by meti and launched onboard nasa s terra spacecraft in.
This makes the file size several times larger than a well. The aster gdem version 2 was validated against the 10 mmesh dem produced by the geographical survey institute gsi of japan. Mar 24, 2001 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. Government computer this is the nasa land processes distributed active archive center lp daac distribution server hosted at the usgs earth resources observation and. A digital raster graphic drg is a scanned image of a usgs standard series topographic map, including all map collar information. Nebraska maps and more, the snr store, is pleased to serve as the outlet for digital raster graphics, a revolutionary new map series recently completed for nebraska. The new global digital elevation model, aster gdem, was produced by the ministry of economy, trade and industry meti of japan and the united states national aeronautics and space administration nasa from optical stereo data acquired by the advanced spaceborne thermal emission and reflection radiometer aster satellite instrument. In addition, as part of this transition, usgs legacy digital raster graphic drg or scanned map service will also be retired. Aster gdem version 3 shaded relief topography of san francisco, california, usa. Lp daac land processes distributed active archive center sioux falls, sd. This raster product identifies all water bodies as either ocean, river, or lake. Geological survey usgs standard series topographic map, including all map collar information. Extract eleavtion value from arster gdem posted in gis. Free digital elevation model dem and free satellite data.
Government computer this is the nasa land processes distributed active archive center lp daac distribution server hosted at the usgs earth resources observation and science eros center. This dataset contains gis mapping data representing the tile indices for the 24k, 100k, and 250k usgs scanned topographic maps drgs. Validation of the aster global digital elevation model gdem version 2 over the conterminous united states. Nov 06, 2016 download aster dem digital elevation model for free from usgs how to download dem data from usgs download free dem digital elevation model download how to download dem digital elevation model usgs. The library is an important resource for analyzing imaging spectrometer data, also known as hyperspectral. These maps are best used with global positioning software or a map viewer. The primary goal of the conus validation was to fully characterize the vertical accuracy of gdem v2. Correlation of the aster gdem to the nextmap dtm and srtm3 figure 9.
Extract eleavtion value from arster gdem gis cartotalk. Each gdem tile has a corresponding water body tile. The usgs sentinel2look viewer allows comprehensive searching and downloading of fullresolution sentinel2 images. The absolute vertical accuracy of gdem v2 was calculated by comparison with more than 18,000 independent reference geodetic ground control points from the national geodetic survey.
Usgs digital raster graphic drg files clearinghouse. Nov 01, 2016 in addition, as part of this transition, usgs legacy digital raster graphic drg or scanned map service will also be retired. The national map uses naip imagery as a key component of its us topo map products. However i am having an issue with the bit depth of the provided data. Each drg is available in tiff format with a corresponding world file to georeference the image. The gdem and astwbd are available for download from nasa earthdata and japan space systems. Go to the topographicdatadrg folder to download the data. A geographic information system or geographical information system gis is a system designed to capture, store, manipulate, analyze, manage, and present all. As part of the offerings associated with the product, it also provides imagery compressed files for download and imagery web map. The tiles selected for validation study were n35e6, n35e7, n36e6 and n36e7 fig. Not to be used for navigation, for informational purposes only. The aster global digital elevation model exhibits the highest spatial resolution data. They were located in central japan which covers sea level to very steep over 3000 m high peaks.
A digital raster graphic drg is a scanned image of a u. The aster gdem covers land surfaces between 83n and 83s, and was produced through automated processing of 2. Welcome rgis is a community dedicated to everything gis geographic information systems. Pdf detection and correction of aster gdem v2 data. Drgs replaced for these reasons are not available for sale and do not appear on this list. Nasas earth observing system data and information system eosdis is a key core capability in nasas earth science data systems program for archiving and distributing earth science data from multiple missions to users. Us geological survey usgs national elevation dataset ned data and 1 arcsecond digital. Aster gdem and srtm were pleased to announce the availability of new global digital elevation models in gibs from terrasadvanced spaceborne thermal emission and reflection radiometer aster instrument and theshuttle radar topography mission srtm. The original data of aster gdem is the property of meti and nasa. Introduction the advanced spaceborne thermal emission and reflection radiometer aster global digital elevation model gdem was developed jointly by the ministry of economy, trade, and industry meti of japan and the united states national aeronautics and space administration nasa. Likely you will have set your gps device to wgs84 ellipsoid, while the aster gdem data are referenced to the egm96 geoid. They were located in central japan which covers sea. 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. Users can display the footprint and thumbnail of one or more products, view metadata, directly download the file or add to a cart.