Raster topographic maps10/5/2023 NHD and WBD editing is ongoing for an additional 100,000 square miles in Alaska, primarily on the North Slope. The Cook Inlet, Matanuska-Susitna (Mat-Su), and Copper River watersheds are updated through NHDPlus HR. Revised NHD and WBD data are then used to create important watershed characteristic data delivered via NHDPlus HR. These efforts will eventually support the development of an operational National Water Model for Alaska. Hydrographic features and watershed boundaries are being derived from the Alaska IfSAR elevation data using elevation-derived-hydrography methodology. The National Hydrography Dataset (NHD), the Watershed Boundary Dataset (WBD), and NHDPlus High Resolution (NHDPlus HR) for Alaska are being updated through collaborative Federal and State partnerships to meet accuracy and content specifications suitable for 1:24,000-scale mapping. USGS is supporting a statewide update of terrestrial hydrography data (surface water, such as lakes and rivers) for Alaska. Paper copies can be ordered for a fee from the USGS store located online at. Īlaska US Topo maps are available for free download at. Bulk download is also available from USGS, and instructions can be found at. Coverage is currently available for all of Alaska except Kodiak Island and the western Aleutian Islands, which are expected to be available by May 2021. USGS offers the 5-meter IfSAR data tiles, and also provides seamless post-processed elevation data at approximately 10-meter, 30-meter, and 60-meter post spacing. The State of Alaska offers 5-meter IfSAR by tiles for the entire State through their elevation portal found at. Two convenient online portals are available for downloading Alaska IfSAR data. A second round of new US Topo map generation will begin in summer 2022. The maps are distributed for free download and use in a convenient PDF format that can be viewed on a computer or mobile device, or printed to paper. Each map is created using new contours generated from the new IfSAR elevation data. 11,278 new US Topo maps of Alaska were published by USGS from 2013 to 2021 and provide statewide map coverage at 1:25,000 map scale. 'US Topo' is a digital topographic map format produced by USGS. 5-meter resolution IfSAR elevation data collected statewide for Alaska from 2012 to 2019 is available for download.Ī New Digital US Topo Map Series Is Available Statewide for Alaska
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