Pictures of what the LF program incorporates with the LANDFIRE logo on the left and USFS and DOI on the right
LANDFIRE - multi-partner wildland fire, ecosystem, and wildland fuel mapping project USFS DOI
[Skip to Content]
Data Links
  Who Are We
 
 
Homepage » Topographic
Topographic Product Alerts
Topographic Product Alerts
posted 2022-02-15 [Topographic] Updated LF 2020 Topographic products with true north calculations...

Reason for alert: As part of the LANDFIRE (LF) 2020 update new topographic products (Slope, Aspect, and Elevation) have been released for the Conterminous U.S. (CONUS), Alaska (AK), Hawaii (HI), and Puerto Rico and the Virgin Islands (PRVI). This release corrects Aspect, which is now calculated from true north.

Updated product(s) or information: LF 2020 (LF 2.2.0) Slope Degree, Slope Percent Rise, Aspect, and Elevation for CONUS, HI, AK, and PRVI were released on 02/15/2022. Full extent mosaic bundles have also been released.

Problem or issue description: The new LF 2020 topographic products are consistently calculated from true north correcting earlier topographic products where Aspect was calculated incorrectly. Users are advised to download these new LF 2020 Slope Degree (previously known as Slope), Slope Percent Rise, Aspect, and Elevation products for CONUS, HI, AK, and PRVI to replace any topographic products that were downloaded prior to February 15, 2022. We also advise that users that have LCP files created prior to this update re-create them.

posted 2014-09-08 [Topographic] The Alaska Aspect layer was updated due to a processing error...

Alaska Aspect was updated September 08, 2014. The Alaska Aspect layer was updated due to a processing error.

Users are advised to delete local copies of these layers downloaded prior to September 08, 2014 and download the updated versions. We regret any inconvenience this may cause.


Topographic


Data Products:Reference  ∕  Disturbance  ∕  Vegetation  ∕  Fuel  ∕  Fire Regime  ∕  Topographic  ∕  Transportation  ∕  Seasonal  ∕  Who are We
     Notifications Alerts

Latest NewsLatest News

Get Data

Topographic products provide geospatial information describing the landscape of the United States and its territories.


Products
Aspect - azimuth of the sloped surfaces across a landscape
Elevation- land height (meters) above mean sea level
Slope - change of elevation over a specific area

Application

Topographic data serve as input to the Landscape (.LCP) file which is used in models to predict wildland fire behavior and effects.

Note: New with LF 2020, topographic products are consistently calculated from true north, a correction from earlier topographic products where Aspect was calculated incorrectly. Users are advised to download the new LF 2020 topographic products for CONUS, HI, AK, and PRVI to replace any LF topographic products previously downloaded. We also advise that LCP files created from earlier topographic products be re-created using the new LF 2020 topographic products.

 

 
Users may experience intermittent service Thursday evenings due to routine maintenance.
The LF Map Viewer (DDS) will be down every 3rd Wednesday from 8 am - 10:00 am (CDT) for routine maintenance.
URL: https://www.landfire.gov/
To view and print a PDF you must obtain and install the Acrobat® Reader, available at no charge from Adobe Systems.
*DOI and USGS link and privacy policies apply.
Looking for something: Site Map   /   Search
Page Contact Information: LF Helpdesk