LANDFIRE 2020 Elevation (Elev) AK

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
LANDFIRE, Earth Resources Observation and Science Center (EROS), U.S. Geological Survey
Publication_Date: 20220131
Title: LANDFIRE 2020 Elevation (Elev) AK
Edition: LF 2020
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:
Publication_Place: Sioux Falls, SD
Publisher:
Earth Resources Observation and Science Center (EROS), U.S. Geological Survey
Online_Linkage: https://www.landfire.gov
Description:
Abstract:
In late 2021 the LANDFIRE (LF) team responded to feedback and created new topographic products (Elevation, Slope, and Aspect) for the Conterminous US, Alaska, Hawaii, and Puerto Rico and the Virgin Islands to release in early 2022. To create the new LF 2020 Elevation product, 1 arc-second (approx. 30 meters) Digital Elevation Model (DEM) tiles were downloaded from The National Map (TNM) Downloader (v2.0) on Nov. 16, 2021. Several missing locations especially along coastal areas and a 90km buffer into Canada were filled using 1/3 arc-second DEM (approx. 10 meters), 2 arc-second DEM (approx. 60 meters), or ASTER DEM 1 arc-second V003 (search.earthdata.nasa.gov/search) in order of priority. The tiles were mosaicked in the native coordinate system (GCS_North_American_1983 WKID: 4269 Authority: EPSG) and format (32-float). The file was projected to NAD_1983_Alaska_Albers (WKID: 3338 Authority: EPSG) using the Project Raster tool in ArcGIS Desktop 10.6.1 with Bilinear Interpolation resampling method, cell size and spacing set to the LF grid. This file was used to calculate aspect and slope. The file was then converted to Signed 16-bit using the Copy Raster tool in ArcGIS Desktop 10.6.1 and then clipped to the LF boundary using the Extract by Mask tool in ArcGIS Desktop 10.6.1. Several NoData areas and erroneous negative values along coastal areas were assigned value zero (0) that overlap the LF data extent which includes a 3 nautical mile buffer along coastal areas. -9999 indicates NoData.
Purpose:
LANDFIRE 2020 Update (LF 2020) is designed to produce vegetation, disturbance, and fuels products that inform wildland fire and ecological decision systems. LF 2020 is an update to the new base map, LF 2016 Remap (LF Remap), which improved past methodologies and processes to incorporate current satellite imagery, contemporary data sources, and the latest software and hardware technologies. LF 2020 utilizes the most recent and relevant geospatial data available to offer products that reflect current conditions.
LF 2020 products are designed to facilitate national and regional level strategic fire and resource management planning and reporting of management activities. The principal purposes of the products include providing, 1) national level, landscape scale geospatial products to support fire and fuels management planning, and 2) consistent fuels products to support fire planning, analysis, and budgeting to evaluate fire management alternatives.
Products are created at a 30 meter raster; however, the applicability of products varies by location and specific use. LF products were designed to support 1) national (all states) strategic planning, 2) regional (single large states or groups of smaller states), and 3) strategic/tactical planning for large sub regional landscapes and Fire Management Units (FMUs) (such as significant portions of states or multiple federal administrative entities). The applicability of LF products to support fire and land management planning on smaller areas will vary by product, location, and specific use. Managers and planners must evaluate LF products according to the scale and requirements specific to their needs.
Supplemental_Information:
LF 2020 Elevation products are in meters above sea level. LF 2020 AK products were mapped with a 90km buffer into Canada. The datum used was NAD 83 AK Albers. See the CONUS LF 2020 Elevation metadata for full citation list.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2020
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Annually
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -179.3173
East_Bounding_Coordinate: 175.4184
North_Bounding_Coordinate: 71.5478
South_Bounding_Coordinate: 48.8767
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: fires
Theme_Keyword: hazard preparedness
Theme_Keyword: remote sensing
Theme_Keyword: image collections
Theme_Keyword: geospatial datasets
Theme_Keyword: geographic information systems
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: raster digital data
Theme_Keyword: Elevation
Theme_Keyword: U.S. Geological Survey (USGS)
Theme_Keyword: LF 2020
Theme_Keyword: topography
Theme_Keyword: topo
Place:
Place_Keyword_Thesaurus: Common geographic areas
Place_Keyword: US
Place_Keyword: AK
Place_Keyword: United States
Place_Keyword: Alaska
Place_Keyword: OCONUS
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
LANDFIRE, Earth Resources Observation and Science Center (EROS), U.S. Geological Survey
Contact_Position: Customer Service Representative
Contact_Address:
Address_Type: physical
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198
Country: U.S.
Contact_Voice_Telephone: 605-594-6151
Contact_Electronic_Mail_Address: helpdesk@landfire.gov
Data_Set_Credit:
These products were created by the LF team at USGS EROS, Sioux Falls, SD. Refer to the contact information throughout this metadata to contact the LF team.
Security_Information:
Security_Classification_System: None in place
Security_Classification: Unclassified
Security_Handling_Description:
If there is ever doubt, contact the LF Help Desk at helpdesk@landfire.gov
Native_Data_Set_Environment: Microsoft Windows 10; ESRI ArcCatalog 10.6.1

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Products were tested to ensure that each attribute is represented consistently across all data sets. Attributes were not validated against in person observations.
Logical_Consistency_Report:
The products were pixel "truth" tested for consistency of land or water characteristics across all products.
Completeness_Report:
Products were formally tested to ensure that valid data was produced for all pixels. Each product was then validated and tested for duplicates, omissions, and errors.
Lineage:
Process_Step:
Process_Description:
Beginning in 2016 LF Remap products were created using recent advances in image compositing, tiling algorithms, and faster computing hardware to ensure that LF products remained relevant. LF Remap leveraged the Landsat archive, lidar data, and user contributed field plot data compiled into the LF Reference Database (LFRDB), to create new base map vegetation products. Reference resources included, but were not limited to, Forest Inventory and Analysis (FIA) program plot data (USFS https://fia.fs.fed.us/), Landsat Dynamic Surface Water Extent [(DSWE) USGS https://www.usgs.gov/landsat-missions], the National Land Cover Dataset [(NLCD) USGS https://www.mrlc.gov/data], and National Agricultural Statistics Service [(NASS) USDA - https://www.nass.usda.gov/]. To read more about LF reference resources go to https://www.landfire.gov/reference.php. Information about LF Remap product testing is available by request or via the website at https://www.landfire.gov.
Process_Date: 20220131

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 66861
Column_Count: 126115
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 55.0
Standard_Parallel: 65.0
Longitude_of_Central_Meridian: -154.0
Latitude_of_Projection_Origin: 50.0
False_Easting: 0.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 30.0
Ordinate_Resolution: 30.0
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North_American_Datum_1983
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.2572221010042

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
LANDFIRE (LF) 2020 Elevation AK. An Attribute Table is included with each product download as a .dbf and embedded in the metadata. The Attribute Data Dictionary (ADD) can be found at https://www.landfire.gov/.
Entity_and_Attribute_Detail_Citation: https://landfire.gov/elevation.php

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
LANDFIRE, Earth Resources Observation and Science Center (EROS), U.S. Geological Survey
Contact_Position: Customer Service Representative
Contact_Address:
Address_Type: physical
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198
Country: U.S.
Contact_Voice_Telephone: 605-594-6151
Contact_Electronic_Mail_Address: helpdesk@landfire.gov
Distribution_Liability:
This product is reproduced from geospatial information prepared by the U.S. Department of the Interior (DOI) USGS EROS. By removing the contents of this package or taking receipt of these files via electronic file transfer methods, you understand that the data stored on this media can be updated at any time. Represented features may not be in an accurate geographic location. USGS EROS makes no expressed or implied warranty, including warranty of merchantability and fitness, with respect to the character, function, or capabilities of the data or their appropriateness for any user's purposes. USGS EROS reserves the right to correct, update, modify, or replace this geospatial information without notification.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCG
Format_Version_Date: 20220131
Format_Specification: LF 2020
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://www.landfire.gov
Fees: none

Metadata_Reference_Information:
Metadata_Date: 20220131
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
LANDFIRE, Earth Resources Observation and Science Center (EROS), U.S. Geological Survey
Contact_Position: Customer Service Representative
Contact_Address:
Address_Type: physical
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198
Country: U.S.
Contact_Voice_Telephone: 605-594-6151
Contact_Electronic_Mail_Address: helpdesk@landfire.gov
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None