The following spatial data products can be displayed in dlgv32 Pro.
Elevation data are displayed in dlgv32 Pro as shaded relief terrain models, vertical perspective only. The sample data sets provided from this page are custom packaged for the convenience of dlgv32 Pro users.
Description: Vector data derived from U. S. Geological Survey (USGS) topographic maps. Global Mapper will not display DLG-S data, an older format that is no longer sold or supported. Most USGS DLG-Optional data do not contain record delimiters. Global Mapper does not require that delimiters be added, and will display DLG-O data with or without delimiters. Other software may require either the absence or presence of delimiters.
Available for free? No. However, some scales have been converted to Spatial Data Format Standard (STDS). See links below.
Web Pages and FTP Sites:
| USGS Geographic Data Download Page | ftp://edcftp.cr.usgs.gov/pub/data/DLG/100K/ |
| USGS Geographic Data Download Page | http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/ndcdb.html |
| Ask USGS | http://ask.usgs.gov |
| General information about DLGs | http://nsdi.usgs.gov/products/dlg.html |
Description: Vector data derived from USGS topographic maps. Spatial content is equivalent to DLG-O, but physical format and metadata content are more robust. Scales are 1:24,000/25,000, 1:100,000 and 1:2,000,000. DLG/SDTS data are derived directly from DLG-O data, which continue to be produced and sold as before.
Available for free? Yes.
Web Pages and FTP Sites:
| USGS Geographic Data FTP Site | ftp://edcftp.cr.usgs.gov/pub/data/DLG/ |
| USGS Geographic Data Download Page | http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/ndcdb.html |
| Ask USGS | http://ask.usgs.gov |
| SDTS Home Page | http://mcmcweb.er.usgs.gov/sdts/ |
Description: Elevations in a regular grid, derived from USGS topographic map contours or directly from aerial photography.
Available for free? 1:250,000 scale (also known as 1-degree DEM) data are available for free. Other scales can be purchased from USGS Earth Science Information Centers.
Web Pages and FTP Sites:
| USGS Geographic Data FTP Site | ftp://edcftp.cr.usgs.gov/pub/data/DEM/250/ |
| USGS Geographic Data Download Page | http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/ndcdb.html |
| Ask USGS | http://ask.usgs.gov |
| USGS Elevation Program Home Page | http://rmmcweb.cr.usgs.gov/elevation/dpi_dem.html |
Description: Elevation data derived directly from USGS native format DEMs. Spatial content is equivalent to DEM, but physical format and metadata content are more robust. 7.5-minute data (1:24,000 & 1:25,000 scale) and 1:250,000 scale are available in SDTS format. Native format data continue to be produced and sold.
Available for free? Yes.
Web Pages and FTP Sites:
| USGS Geographic Data FTP Site | ftp://edcftp.cr.usgs.gov/pub/data/DEM/7.5min/ |
| USGS Geographic Data Download Site | http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/ndcdb.html |
| Ask USGS | http://ask.usgs.gov |
| SDTS Home Page | http://mcmcweb.er.usgs.gov/sdts |
Description: Elevation data derived directly from USGS native format DEMs. This is an experimental format and is not available for sale. GeoTIFF DEMs are implemented as 16-bit TIFF images to preserve absolute elevation values. 16-bit data, while allowed by the TIFF 6.0 standard, is not widely implemented in TIFF viewers, so these files may or may not be viewable in other software.
Available for free? No. DEM data in GeoTIFF format is not a USGS product.
Web Pages and FTP Sites:
Description: Scanned images of USGS topographic quadrangles, georeferenced to the Universal Transverse Mercator grid. Images are in TIFF 6.0 format with either GeoTIFF extensions or an accompanying TIFF world file (TFW).
Available for free? Not from the USGS. DRGs are sold on CD by USGS sales offices. However, a wide variety of other organizations serve DRGs and similar data for free. Some of these sites are linked from the DRG home page.
Web Pages and FTP Sites:
| DRG Home Page | http://mcmcweb.er.usgs.gov/drg |
| Ask USGS | http://ask.usgs.gov |
Description: DOQs are aerial photographs that have been rectified to have the scale and geometry of a map, and joined or cut to cover the same area as USGS topographic map quadrangles. These images typically have a ground resolution of 1 meter. They are packaged in quarter-quad format (four physical files to one 1:24,000 scale quadrangle) because of the very large file sizes. Most DOQs are 8-bit grayscale images, but 24-bit color images are also available in some areas. The native format of these files is a ban-interleaved-by-line (BIL) image with a keyword text header at the beginning of the file.
Available for free? No.
Web Pages and FTP Sites:
| General information about DOQs | http://geography.usgs.gov/www/ndop |
| Ask USGS | http://ask.usgs.gov |
Description: DOQs are aerial photographs that have been rectified to have the scale and geometry of a map, and joined or cut to cover the same area as USGS topographic map quadrangles. These images typically have a ground resolution of 1 meter. They are packaged in quarter-quad format (four physical files to one 1:24,000 scale quadrangle) because of the very large file sizes. The GeoTIFF version of this product is exactly the same image as the native format.
Available for free? No.
Web Pages and FTP Sites:
| DOQ in GeoTIFF | http://mcmcweb.er.usgs.gov/sdts/geotiff.html |
| General information about DOQs | http://geography.usgs.gov/www/ndop |
| Ask USGS | http://ask.usgs.gov |
Description: DOQs are aerial photographs that have been rectified to have the scale and geometry of a map, and joined or cut to cover the same area as USGS topographic map quadrangles. These images typically have a ground resolution of 1 meter. They are packaged in quarter-quad format (four physical files to one 1:24,000 scale quadrangle) because of the very large file sizes. Most DOQs are 8-bit grayscale images, but 24-bit color images are also available in some areas. The native format of these files is a JPEG encoded image with an accompanying header file to provide metadata.
Available for free? No.
Web Pages and FTP Sites:
| General information about DOQs | http://geography.usgs.gov/www/ndop |
| Ask USGS | http://ask.usgs.gov |
Description: The Geographic Names Information System (GNIS) contains name and locative information about almost 2 million physical and cultural features located throughout the United States and its Territories. GNIS was developed by the USGS in cooperation with the U.S. Board on Geographic Names (BGN) to promote the standardization of feature names.
Available for free? Yes.
Web Pages and FTP Sites:
| GNIS Download Site | http://geonames.usgs.gov/stategaz/index.html |
Description: The Land Use and Land Cover (LULC) data files describe the vegetation, water, natural surface, and cultural features on the land surface. The USGS provides these data sets and associated maps as a part of its National Mapping Program. The LULC mapping program is designed so that standard topographic maps of a scale of 1:250,000 can be used for compilation and organization of the land use and land cover data. In some cases, such as Hawaii, 1:100,000 scale maps are also used. Global Mapper currently supports the GIRAS format of these files. The grid cell (CTG) format is not yet supported.
Available for free? Yes.
Web Pages and FTP Sites:
| USGS Geographic Data Download Page | http://edcwww.cr.usgs.gov/glis/hyper/guide/1_250_lulc |
Description: The USGS National Elevation Dataset (NED) has been developed by merging the highest-resolution, best-quality elevation data available across the United States into a seamless raster format. NED is the result of the maturation of the USGS effort to provide 1:24,000-scale DEM data for the conterminous US and 1:63,360-scale DEM data for Alaska. NED data is available in BIL, float/grid, and ArcGrid formats.
Available for free? Yes
Web Pages and FTP Sites:
| NED Home Page | http://edcnts12.cr.usgs.gov/ned/ |
| USGS Seamless Data Distribution Center (Arc Grid and GeoTIFF Formats) | http://seamless.usgs.gov/ |
Description: A global DEM with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer, varies with latitude). GTOPO30 was derived from several raster and vector sources of topographic information. These data were produced jointly by several national and international organizations. The physical format of these data is different than USGS DEM data. GTOPO30 files are very large; note file sizes before downloading.
Available for free? Yes.
Web Pages and FTP Sites:
| GTOPO30 Home Page | http://edcwww.cr.usgs.gov/landdaac/gtopo30/gtopo30.html |
Description: Control point data from the National Oceanic and Atmospheric Administration (NOAA), National Geodetic Survey (NGS). Recently made available in SDTS format. Note that Global Mapper will display only the SDTS version of these data, and will not display the native NGS data sheet format.
Available for free? Yes.
Web Pages and FTP Sites:
| NOAA DSDATA Home Page | http://www.ngs.noaa.gov/cgi-bin/datasheet.prl |
Description: A collection of public domain Digital terrain models (DTM) from the NOAA National Geophysical Data Center. This collection includes an improved 5-minute DTM of land and ocean values for the entire world.
Available for free? Yes. Also sold on CD.
Web Pages and FTP Sites:
| NOAA TerrainBase Home Page | http://www.ngdc.noaa.gov/seg/fliers/se-1104.html |
Description: The CDED consists of an ordered array of ground elevations at regularly spaced intervals. It is based on National Topographic System (NTS) maps at the 1:250,000 scale. Nearly complete coverage of Canada is available. CDED data use the same physical format as USGS DEM data, and therefore can be displayed by Global Mapper.
Available for free? Yes. CDED data is avaailable at the GeoBase web site below.
Web Pages and FTP Sites:
| GeoBase Canada | http://www.geobase.ca |
| Center for Topographic Information | http://maps.nrcan.gc.ca |
| Standards and Specifications | http://www.cits.rncan.gc.ca/fich_ext/1/text//products/dnec/cdedspec.pdf |
Description: With the appropriate World File (typically with a JPGW extension), a JPEG image may be positioned geographically in Global Mapper. A prime example of this is the satellite photos freely available from TerraServer. These images can be saved along with an appropriate JPGW for later viewing.
Available for free? Yes.
Web Pages and FTP Sites:
| TerraServer Home Page | http://terraserver-usa.com/ |
Description: With the appropriate World File (typically with a PNGW extension), a PNG image may be positioned geographically in Global Mapper.
Available for free? Sometimes.
Web Pages and FTP Sites:
Description: The DXF format is a tagged data representation of all the information contained in an AutoCAD drawing file. Tagged data means that each data element in the file is preceded by an integer number that is called a group code. A group code's value indicates what type of data element follows. This value also indicates the meaning of a data element for a given object (or record) type. Virtually all user-specified information in a drawing file can be represented in DXF format.
Available for free? Sometimes.
Web Pages and FTP Sites:
| Autodesk AutoCAD DXF Documentation | http://usa.autodesk.com/ |
Description: A shapefile stores nontopological geometry and attribute information for the spatial features in a data set. The geometry for a feature is stored as a shape comprising a set of vector coordinates. Global Mapper supports loading Shapefiles directly from .tar.gz files, so you do not need to uncompress your Shapefile data if you do not want to.
Available for free? Yes.
Web Pages and FTP Sites:
| The National Atlas of the United States of America | http://www.nationalatlas.gov/atlasftp.html |
Description: Surfer Grid Format files are used to store a grid of elevation data. This format is supported by several software packages, with Golden Software's Surfer package being the most prominent. Global Mapper support both the import and export of this format.
Available for free? Sometimes.
Web Pages and FTP Sites:
| Golden Software: Surfer Product Information | http://www.goldensoftware.com |
Description: Canada3D is a DEM produced by the Canadian Forestry Service, Ontario region. The DEM consists of an ordered array of ground elevations providing coverage of the entire Canadian landmass. It has been derived from the cells of the CDED at the 1:250 000 scale. Canada3D is available in two forms: grids regularly spaced at 30 or 300 arc-seconds. Canada3D 30 and 300 are recorded separately in ASCII text file format. The elevation values are expressed in meters with respect to mean sea level (MSL), in accordance with the North American Datum of 1983 (NAD83).
Available for free? Yes
Web Pages and FTP Sites:
| Center for Topographic Information | http://maps.nrcan.gc.ca |
Description: The goal of the IBCAO initiative is to develop a digital data base that contains all available bathymetric data north of 64 degrees North, for use by mapmakers, researchers, and others whose work requires a detailed and acurate knowledge of the depth and the shape of the Arctic seabed. Global Mapper supports the import of this data in the netCDF format. Import of the ASCII grid format is not yet supported.
Available for free? Yes
Web Pages and FTP Sites:
| IBCAO 2000 Beta Grid | http://www.ngdc.noaa.gov/mgg/bathymetry/arctic/ibcaobetagrid.html |
Description: A newly constructed global elevation data base gridded at 2-minute (latitude-longitude) resolution. The ETOPO2 data set contains both land data from the Global Land One-kilometer Base Elevation (GLOBE) project as well as seafloor topography from various sources.
Available for free? Yes
Web Pages and FTP Sites:
| ETOPO2 Home Page (Not Free Here) | http://www.ngdc.noaa.gov/mgg/fliers/01mgg04.html |
| ETOPO2 Data and Docs (Free Here, Download etopo2.grd) | http://dss.ucar.edu/datasets/ds759.3/ |
Description: The Global Land One-kilometer Base Elevation (GLOBE) digital elevation model is the most thoroughly designed, reviewed, and documented global digital elevation dataset to date. GLOBE comprises a global 30 arc-second latitude-longitude array, with land areas populated with integer elevation data. GLOBE is available on the World Wide Web, and on CD-ROM in a format convenient for image processing and raster geographic information systems (GIS). Full GLOBE documentation is available on the CD-ROM and Website. To load GLOBE data into Global Mapper, first download and uncompress the data files (if necessary). Name the large elevation data file with the .bin extension. Then download the GeoVu header for the tile that you just downloaded and place it in the same directory as the .bin file. Finally, use the File->Open menu item to load the .bin file.
Available for free? Yes
Web Pages and FTP Sites:
| The Global Land 1-km Base Elevation (GLOBE) Project | http://www.ngdc.noaa.gov/seg/topo/globeget.shtml |
| GLOBE FTP Site | ftp://ftp.ngdc.noaa.gov/GLOBE_DEM/data/elev/ |
Description: The Arc/Info ASCII Grid format is an elevation grid exchange format used by Arc/Info.
Available for free? Sometimes.
Web Pages and FTP Sites:
Description: The Arc/Info Binary Grid format is the format used by Arc/Info internally to store elevation grids.
Available for free? Sometimes.
Web Pages and FTP Sites:
Description: The LizardTech MrSID format is a raster format which uses wavelet-based compression techniques to achieve extremely high compression ratios for raster data sets.
Available for free? Sometimes.
Web Pages and FTP Sites:
| LizardTech Home Page | http://www.lizardtech.com |
Description: The E00 format is the Arc/Info exchange format for groups of vector coverages.
Available for free? Sometimes.
Web Pages and FTP Sites:
Description: The ECW format uses a wavelet based compression method to achieve extremely high compression ratios on airphotos and scanned topographic maps. Typical compression ratios range between 20:1 and 100:1 which maintaining a very high level of quality. In addition, ECW format data can be dynamically served over the internet using ER Mapper's Image Web Server. Global Mapper can load ECW format data both from local files and directly from Image Web Server. Several sample web served links are built into Global Mapper for the convenience of the end user.
Available for free? Sometimes
Web Pages and FTP Sites:
| ER Mapper Home Page | http://www.ermapper.com |
| Image Web Server Home Page | http://www.earthetc.com |
Description: The ERDAS Imagine Image format is the raster data format used with the ERDAS Imagine software product line. Typical imagery includes satellite data as well as land coverages. For multi-band images and grayscale images, Global Mapper will automatically apply a two-standard deviation contrast stretch in order to generate an aesthetically pleasing image with no intervention. If present, the first 3 bands will be used the generate the image, with band 1 being red, band 2 being green, and band 3 being blue.
Available for free? No
Web Pages and FTP Sites:
| ERDAS Home Page | http://www.erdas.com |
Description: In support of military applications, the National Imagery and Mapping Agency (NIMA) has developed standard digital datasets (Digital Terrain Elevation Data (DTED)) which is a uniform matrix of terrain elevation values which provides basic quantitative data for systems and applications that require terrain elevation, slope, and/or surface roughness information.
Available for free? Yes
Web Pages and FTP Sites:
| GIS Data Depot Download Center | http://www.gisdatadepot.com/catalog/index.html |
Description: The MapInfo MIF/MID and TAB/MAP formats are both formats used by the MapInfo software package to store vector map information.
Available for free? Sometimes
Web Pages and FTP Sites:
| GIS Data Depot Download Center | http://www.gisdatadepot.com/catalog/index.html |
Description: NIMA is now able to provide complete files of geographic names information covering countries or geopolitical areas. The files are not in customary gazetteer format, but are in a special format amenable to input into geographic information systems, databases, and spreadsheets, giving end users powerful capabilities for data analysis, manipulation, and display. The files contain names for all types of features. The file fields are described in description of file fields. Names are in reading order. The files are ASCII files and are tab delimited. The files are zip files. Dates indicate when the file was generated from the database.
Available for free? Yes
Web Pages and FTP Sites:
| NIMA GNS Data Site | http://164.214.2.59/gns/html/cntry_files.html |
Description: Global Mapper is able to export loaded elevation grid data to Terragen terrain files. These files can be used with the Terragen software package to create beatifully rendered 3D landscapes.
Available for free? Yes
Web Pages and FTP Sites:
| Terragen Home Page | http://www.planetside.co.uk/terragen/ |
| Terragen Users Group | http://groups.yahoo.com/group/terragen/ |
Description: MicroStation DGN format files are files compatible with Bentley's MicroStation product line. Global Mapper can import DGN files created with MicroStation prior to MicroStation v8.
Available for free? Yes
Web Pages and FTP Sites:
| Bentley System, Inc. Home Page | http://www2.bentley.com/ |
Description: The Shuttle Radar Topography Mission (SRTM) data products result from a collaborative mission by the National Aeronautics and Space Administration (NASA), the National Imagery and Mapping Agency (NIMA), the German space agency (DLR) and Italian space agency (ASI), to generate a near-global digital elevation model (DEM) of the Earth using radar interferometry. The SRTM-1 (1 arc-second) and SRTM-3 (3 arc-second) digital elevation models are being developed from the SRTM C-band radar observations for selected regions to satisfy the needs of NASA related projects and to speed the evaluation of acquisition and processing and applications algorithms.
Available for free? Yes, SRTM data is available in GeoTIFF, Arc Grid, and HGT formats, all of which Global Mapper supports.
Web Pages and FTP Sites:
| SRTM Home Page | http://www.jpl.nasa.gov/srtm/ |
| USGS Seamless Data Distribution Center (Arc Grid and GeoTIFF Formats) | http://seamless.usgs.gov/ |
| SRTM FTP Site (HGT Format) | ftp://edcsgs9.cr.usgs.gov/pub/data/srtm/ |
Description: Various types of imagery are often distributed in simple binary formats such as the BIL (binary interleaved), BSQ (binary sequential), and BIP (binary interleaved pixel) formats. These files are usually accompanied by a .hdr file which describes the layout and formatting of the file. Global Mapper requires this .hdr file in addition to the .bil, .bsq, or .bip file in order to load the file.
Available for free? Sometimes, this is a generic format used by many different data providers, so the cost of the data in these formats varies.
Web Pages and FTP Sites:
| GIS Data Depot | http://www.gisdatadepot.com |
Description: ASTER is an imaging instrument that is flying on the TERRA satellite launched in December 1999 as part of NASA's Earth Observing System (EOS). ASTER represents a revolution in the remote sensing community because of the availability of its imagery and its superior resolution. ASTER resolution ranges from 15m to 90m, depending on the wavelength. The quality of the ASTER DEM data is excellent, equivalent in resolution to USGS 30m SDTS DEM data and has free coverage for a large portion of the Globe.
Available for free? Yes, ASTER DEM is freely available in the GeoTIFF (which Global Mapper reads) and HDF formats (which Global Mapper cannot read).
Web Pages and FTP Sites:
| Terrain Map - Follow ASTER DEM links on left for help | http://www.terrainmap.com |
| EOS Data Gateway | http://edcimswww.cr.usgs.gov/pub/imswelcome/ |
Description: BSB charts are high resolution full color scans of nautical charts of several Hydrographic Offices and other producers.
Available for free? No.
Web Pages and FTP Sites:
| MapTech | http://www.maptech.com |
Description: The TIGER/Line files are extracts of selected geographic and cartographic information from the Census Bureau's TIGER (Topologically Integrated Geographic Encoding and Referencing) database.
Available for free? Yes.
Web Pages and FTP Sites:
| 2002 TIGER/Line File Download Page | http://www.census.gov/geo/www/tiger/tiger2002/tgr2002.html |
Description: ADRG is a raster format typically used by military and other government organizations. To load ADRG files, simply load the TRANSH01.THF file from the ADRG file heirarchy or load the ADRG data directly from a .zip file. Global Mapper v6.02 and above can load files in this format.
Available for free? Not usually, often is classified.
Web Pages and FTP Sites:
Description: CADRG and CIB files are raster formats typically used by military and other government organizations. The data is stored as RPF (Raster Product Format). To load CADRG or CIB files, simply load the a.toc file near the root of the RPF tree. CADRG and CIB data can also be loaded from .tar.gz and .zip archives. Global Mapper v6.00 and above can load files in this format.
Available for free? Not usually, often is classified.
Web Pages and FTP Sites:
Description: VPF (Vector Product Format) files are used for vector data sets such as VMAP (Vector Map of the World) and DNC (Digital Nautical Chart). To load a VPF database, either select the dht file at the root of the VPF database tree or select the lht file at a lower level to load just one coverage from the database (the latter option is usually useful for DNC charts). Global Mapper v6.00 and above can load files in this format.
Available for free? Yes.
Web Pages and FTP Sites:
| NGA Raster Roam - VMAP Downloads | http://geoengine.nima.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.html |
| NGA Digital Nautical Charts | http://www.nga.mil/portal/site/dnc/ |
Description: S-57 files are used by many hydographic agencies around the world to store vector marine chart data. To load S-57 charts in Global Mapper, simply load the .000 file or load the chart file(s) directly from a .tar.gz or .zip archive. Global Mapper v6.00 and above can load files in this format.
Available for free? Yes.
Web Pages and FTP Sites:
| NOAA Electronic Navigational Charts | http://chartmaker.ncd.noaa.gov/mcd/enc/index.htm |
Description: JPEG2000 is a relatively new format for storing imagery in a very highly compressed yet high quality manner, similar to the ECW and MrSID formats. Global Mapper v6.00 and above can load files in this format.
Available for free? Varies.
Web Pages and FTP Sites:
| JPEG2000 Standard | http://www.jpeg.org/jpeg2000/ |
Description: Erdas GIS files are used to store raster data (i.e. imagery, scanned maps). Global Mapper v6.00 and above can load files in this format.
Available for free? Varies.
Web Pages and FTP Sites:
Description: GIF files are occasionally used to stored scanned maps. For Global Mapper to load a GIF file, a world file needs to be present for the GIF file otherwise you will have to manually rectify the GIF image. Global Mapper v6.00 and above can load files in this format.
Available for free? Varies.
Web Pages and FTP Sites:
Description: The NOS/GEO marine chart format is a raster format used for storing SoftChart marine charts. Global Mapper v6.00 and above can load files in this format.
Available for free? No.
Web Pages and FTP Sites:
| SoftChart International Electronic Charts | http://www.thecapn.com/charts.htm |
Description: The Garmin PCX5 waypoint (WPT) and track (TRK) file formats are used to store user waypoints and track logs from GPS devices. These files can be loaded into Global Mapper and exported from it in v6.00 and above.
Available for free? Yes.
Web Pages and FTP Sites:
| Garmin | http://www.garmin.com |
Description: The OziExplorer waypoint (WPT) and track (PLT) file formats are used to store user waypoints and track logs from GPS devices by the OziExplorer application. These files can be loaded into Global Mapper v6.00 and above.
Available for free? Yes.
Web Pages and FTP Sites:
| OziExplorer | http://www.oziexplorer.com |
Description: GPX (the GPS Exchange Format) is a light-weight XML data format for the interchange of GPS data (waypoints, routes, and tracks) between applications and Web services on the Internet. These files can be loaded into and exported from Global Mapper v6.02 and above.
Available for free? Yes.
Web Pages and FTP Sites:
| GPX: the GPS Exchange Format | http://www.topografix.com/gpx.asp |
Description: Zmap Plus grid files are used by Geographix applications such as IsoMap to store gridded elevation data. Global Mapper can both import and export data in this format in v6.00 and higher.
Available for free? Varies.
Web Pages and FTP Sites:
| GeoGraphix | http://www.geographix.com |
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U.S. Department of the Interior
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