A Cloud Optimized GeoTIFF (COG) is a GeoTIFF file with an internal organization that enables more efficient workflows in the cloud environment. It does this by leveraging the ability of clients issuing HTTP GET range requests to ask for just the parts of a file they need.
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What is a GeoPDF®?
A GeoPDF is a georeferenced PDF file, meaning that it is a Portable Document Format (PDF) file with added information that relates the image to coordinates on a map. GeoPDF files can be used as plain PDF files but have the added capability of some limited mapping functions (turn any map layers on and off, obtain XY coordinates for a location, measure length, and more).The USGS currently produces...
What happened to the Gridfloat, ArcGrid, and IMG formats for elevation data in The National Map?
USGS elevation data available through The National Map was converted to Cloud Optimized Geotiff (COG - GeoTIFF) format in mid-December, 2019. This change was made to improve product processing time, storage, and to support new and evolving cloud processing capabilities. GeoTIFF is a widely supported raster format and is directly useable by most commercial software that reads or processes Digital...
How do I download layers in The National Map Viewer?
Base map data layers in The National Map Viewer are for viewing only. This application is designed for visualizing data, combining different data layers, and creating (and printing) your own maps. To download data from The National Map, see the link at the top of the Viewer for the Data Downloader. None of the base map layers in the Viewer are available for download, but some of them can be...
Is there an API for accessing The National Map data?
An Application Programming Interface (API) is a way for developers to interface with data. The National Map (TNM) has one API (TNMAccess) that provides access to all TNM downloadable products that are available through The National Map Download Client. Developers can use HTTP GET and POST requests to directly access products, or use the light graphical interface on the API page to generate queries...
Can The National Map data be downloaded via direct links?
Direct access to The National Map data is provided via browsable links through: Amazon's Cloud USGS Server - https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/ Navigate to the appropriate theme folders to access staged products for download. Data can also be downloaded using The National Map Download Client, 3DEP LidarExplorer (lidar only), TopoView (topographic maps only), and the Download...
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- FAQ
What is a GeoPDF®?
A GeoPDF is a georeferenced PDF file, meaning that it is a Portable Document Format (PDF) file with added information that relates the image to coordinates on a map. GeoPDF files can be used as plain PDF files but have the added capability of some limited mapping functions (turn any map layers on and off, obtain XY coordinates for a location, measure length, and more).The USGS currently produces...
What happened to the Gridfloat, ArcGrid, and IMG formats for elevation data in The National Map?
USGS elevation data available through The National Map was converted to Cloud Optimized Geotiff (COG - GeoTIFF) format in mid-December, 2019. This change was made to improve product processing time, storage, and to support new and evolving cloud processing capabilities. GeoTIFF is a widely supported raster format and is directly useable by most commercial software that reads or processes Digital...
How do I download layers in The National Map Viewer?
Base map data layers in The National Map Viewer are for viewing only. This application is designed for visualizing data, combining different data layers, and creating (and printing) your own maps. To download data from The National Map, see the link at the top of the Viewer for the Data Downloader. None of the base map layers in the Viewer are available for download, but some of them can be...
Is there an API for accessing The National Map data?
An Application Programming Interface (API) is a way for developers to interface with data. The National Map (TNM) has one API (TNMAccess) that provides access to all TNM downloadable products that are available through The National Map Download Client. Developers can use HTTP GET and POST requests to directly access products, or use the light graphical interface on the API page to generate queries...
Can The National Map data be downloaded via direct links?
Direct access to The National Map data is provided via browsable links through: Amazon's Cloud USGS Server - https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/ Navigate to the appropriate theme folders to access staged products for download. Data can also be downloaded using The National Map Download Client, 3DEP LidarExplorer (lidar only), TopoView (topographic maps only), and the Download...
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