Frequently Asked Questions

Mapping, Remote Sensing, and Geospatial Data

The USGS provides the mapping and digital geospatial foundation for the Nation.

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Orthoimage of a four-way interchange, Los Angeles, CA
Your personal computer has associated the .jp2 file extension with QuickTime. Under the Internet Options-Programs tab in your web browser, there is an option to 'Set Programs.' Identify where QuickTime is associated with .jp2 and change it. Depending on your Windows environment, it may be different in how the file association is modified, but...
Screen shot of the Topo TNM Style Template customized to the Park Place, Texas 7.5-minute Quadrangle
The "Error: Inventory request failure" message occurs if our ScienceBase catalog database is not responding to download requests. To ensure data integrity, the ScienceBase catalog is shut down for nightly backup at 11:00 pm MT, which takes between 1-2 hours. If you find that the message is still occurring even after the allotted two hours, then...
A multicolored lidar image of the Great Sand Dunes
We have found that if using the Mozilla Thunderbird e-mail client, then download links through a 'ftp' protocol may return empty files. The work-around is a procedure to associate ftp links in Thunderbird with a Web browser (such as Chrome), which then allows links to open and correctly download. Use this procedure at your own discretion:   Open...
The National Map Hydrography Viewer
The direct 'ftp' link to staged products is ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/, while the 'cloud' browse link is https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/. Navigate to appropriate theme folders to access staged products for download. Similar data is offered through either 'ftp' or the 'cloud' except for...
Landsat satellite dish inside radome at USGS EROS
An error may sometimes occur which times out the Web browser after clicking on a download link. If you try refreshing, it may open the archive (.zip) file. In case of an incomplete download, first clear your browser history to avoid the cache interfering with subsequent future attempts. Then use Ctrl-F5 keys to refresh the cache with new content...
National Land Cover Database (NLCD)
To help in the transition of raster data to different file formats, a set of scripts is available for download at https://viewer.nationalmap.gov/tools/rasterconversion/. These scripts require either Geospatial Data Abstraction Library (GDAL) or Esri ArcGIS software for raster data file conversions. Documentation is in HTML and is under the 'How_To...
3DEP Map
Digital elevation models (DEMs) are staged at resolutions of 2 arc-second in Alaska only (about 60 meters north-south, and varies from 20-35 meters east-west), 1 arc-second (about 30 meters), and 1/3 arc-second (about 10 meters), and are available in either ArcGrid, GridFloat, or IMG formats in 1x1 degree tiles. DEMs at 1/9 arc-second (about 3...
National Elevation Dataset
USGS has developed a ScienceBase Product Index API that will support calling our catalog of over two million staged data files. This API allows other applications to have download capability inside their own framework, and to filter on themes of interest, such as Orthoimagery, Elevation, Hydrography, or Land Cover, or by area of interest. In...
The National Map Corps logo
USGS has implemented delivery of staged data from The National Map that no longer requires custom clipping. Staged data has been pre-packaged in tiles so users can download as much data as they want. We host the majority of data in the 'cloud' which increases download speeds and the amount that can be provided in a request, and improves...
The National Map Viewer Interface
Data from The National Map is free and in the public domain. We use "Cart" terminology only as a tracking mechanism to maintain download statistics. There are no restrictions on downloaded data; however, we request that the following statement be used when citing, copying, or reprinting data: "Data available from U.S. Geological Survey, National...
TNMCorp250x250
For more information, please go to the Download and Cart web page. Tutorial videos are also available for using The National Map Download Client in lessons 4a, 4b, and 4c. Guidance for using The National Map Download Manager is provided in lesson 4d.
ALASKA IFSAR DEM
1. To request bulk elevation data, please email tnminfo@usgs.gov and provide the following: Your contact information (address, phone number, and email address). Product(s) you are requesting. Requested data format(s). 2. An email will be sent to you containing the following information: Job ID Number. Size estimates for requested data....