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However, users are advised that the data contains anomalies and artifacts that will impede effectiveness for use in certain applications. Version 3 shows significant improvements over the previous release. The ASTER GDEM V3 maintains the GeoTIFF format and the same gridding and tile structure as V1 and V2, with 30-meter postings and 1 x 1 degree tiles. The refined production algorithm provides improved spatial resolution, increased horizontal and vertical accuracy. The improved GDEM V3 adds additional stereo-pairs, improving coverage and reducing the occurrence of artifacts. ASTER GDEM coverage spans from 83 degrees north latitude to 83 degrees south, encompassing 99 The first version of the ASTER GDEM, released in June 2009, was generated using stereo-pair images collected by the ASTER instrument onboard Terra. Global Digital Elevation Model Version 3 (GDEM 003), and the ASTER Water Body Dataset (ASTWBD) on August 5, 2019. 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) #DOWNLOAD PETA JAKARTA HIGH RESOLUTION PC#This means that it may take a while to download these files, and that you will need a fast PC to work with them.ASTER Global Digital Elevation Map Announcement High resolution files for large areas (countries) can be very large. A cell with a 30 seconds resolution is about 0.8 km2 at the equator and smaller at higher latitudes. The size in square meters varies with latitude. When the cell size is small (e.g., 30 seconds), resolution is high. The units are in (arc) degrees, minutes or seconds. The resolution is the size of each grid cell expressed as the length of one side of one (square) cell. For the other gridfiles, NODATA is only used for areas covered with water, except for the land cover grids, on which water is a separate class.Ī DBF (dBase file) is a dbase format database table. For these areas, the value is "NODATA" (indicating the absence of data for those cells). ( More info on format for developers).Ī gridfile with "country mask" indicates that the areas outside the selected country are masked out. From DIVA-GIS they can be exported to a number of other grid formats including IDRISI and Arc or to shapefiles. Shapefiles contain a single class of "vector" data such as points, lines, or polygons. It can be imported to most other GIS programs. This is a commonly used format that can be directly used in Arc-anything, DIVA-GIS, and many other programs. Grid (raster) data are stored as DIVA gridfilesĮach "shapefile" consist of at least three actual files. ![]() Vector data are stored as ESRI shapefiles You can use programs such as 7-zip, PKZIP or StuffIt to decompress the files. #DOWNLOAD PETA JAKARTA HIGH RESOLUTION ZIP#The files have been compressed and grouped in ZIP files. National Imagery and Mapping Agency's (NIMA) database of foreign geographic feature names They can also be used to map localities, however you can download more recent files from NIMA The files should be placed in the \gazet directory. The files you can download here are for use in DIVA for automatic georeferencing (to assign coordinates to places). Global gridded population databaseĪ gazetteer is a list of place names and their coordinates. Land cover, original data resampled onto a 30 seconds gridĬIESIN, 2000. ![]() Seperate files for line and area features The level of subdivision varies between countries #DOWNLOAD PETA JAKARTA HIGH RESOLUTION FREE#Select and download free geographic (GIS) data for any country in the worldĬountry outlines and administrative subdivisions for all countries. ![]()
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