Early Estimates of Exotic Annual Grass (EAG) in the Sagebrush Biome, USA, 2022 (ver 6.0, July 2022)

These datasets provide early estimates of 2022 fractional cover for exotic annual grass (EAG) species and one native perennial grass species on a bi-weekly basis from May to early July. The EAG estimates are developed within one week of the latest satellite observation used for that version. Each bi-weekly release contains four fractional cover maps along with their corresponding confidence maps for: 1) a group of 16 species of EAGs, 2) cheatgrass (Bromus tectorum); 3) medusahead (Taeniatherum caput-medusae); and 4) Sandberg bluegrass (Poa secunda). These datasets were generated leveraging field observations from Bureau of Land Management (BLM) Assessment, Inventory, and Monitoring (AIM) data plots; Harmonized Landsat and Sentinel-2 (HLS) based Normalized Difference Vegetation Index (NDVI); HLS-based Normalized Difference Water Index (NDWI); other relevant environmental, vegetation, remotely sensed, and geophysical drivers; and artificial intelligence/machine learning techniques. A total of 19,415 AIM plots from years 2016 – 2021 were used to train an ensemble of five-fold regression-tree models using a cross-validation approach (each observation was used as test data once) that developed all the fractional cover maps. The geographic coverage includes arid and semi-arid rangelands in the western U.S at or below 2350-m elevation. Note: Maps of May 6th, 2022 were developed using satellite observation data no later than April 29. Maps of May 18th, 2022 were developed using satellite observation data no later than May 13. Maps of June 3rd, 2022 were developed using satellite observation data no later than May 27. Maps of June 15th, 2022 were developed using satellite observation data no later than June 11. Maps of July 1st, 2022 were developed using satellite observation data no later than June 23. First release: 2022 Revised: May 17, 2022 (ver. 2.0) Revised: May 25, 2022 (ver. 3.0) Revised: June 03, 2022 (ver. 4.0) Revised: June 15, 2022 (ver. 5.0) Revised: July 01, 2022 (ver. 6.0)

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://ddi.doi.gov/usgs-data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier http://datainventory.doi.gov/id/dataset/usgs-62740d45d34e8d45aa6e1e26
metadata_type geospatial
modified 2022-07-01T00:00:00Z
old-spatial -124.9400, 31.1700, -109.0000, 49.0000
publisher U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 18ac5a007327b09dc0ec5c1fabe443dcb315ba7dd00c4d8a18c592323825ef9a
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-124.9400, 31.1700], [-124.9400, 49.0000], [ -109.0000, 49.0000], [ -109.0000, 31.1700], [-124.9400, 31.1700]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • annual-grass
  • annual-herbaceous
  • arizona
  • california
  • cheatgrass
  • colorado
  • exotic
  • great-basin
  • harmonized-landsat-sentinel
  • idaho
  • invasive-species
  • kansas
  • medusahead
  • montana
  • ndvi
  • nebraska
  • nevada
  • new-mexico
  • nonindigenous-species
  • north-dakota
  • noxious
  • oklahoma
  • oregon
  • perennial-grass
  • poa-secunda
  • red-brome
  • remote-sensing
  • rye-brome
  • sagebrush
  • soft-brome
  • south-dakota
  • texas
  • texas-brome
  • united-states
  • usgs-62740d45d34e8d45aa6e1e26
  • utah
  • washington
  • western-united-states
  • wyoming
isopen False
license_id notspecified
license_title License not specified
maintainer Devendra Dahal (CTR)
maintainer_email devendra.dahal.ctr@usgs.gov
metadata_created 2025-09-23T20:50:12.895064
metadata_modified 2025-09-23T20:50:12.895072
notes These datasets provide early estimates of 2022 fractional cover for exotic annual grass (EAG) species and one native perennial grass species on a bi-weekly basis from May to early July. The EAG estimates are developed within one week of the latest satellite observation used for that version. Each bi-weekly release contains four fractional cover maps along with their corresponding confidence maps for: 1) a group of 16 species of EAGs, 2) cheatgrass (Bromus tectorum); 3) medusahead (Taeniatherum caput-medusae); and 4) Sandberg bluegrass (Poa secunda). These datasets were generated leveraging field observations from Bureau of Land Management (BLM) Assessment, Inventory, and Monitoring (AIM) data plots; Harmonized Landsat and Sentinel-2 (HLS) based Normalized Difference Vegetation Index (NDVI); HLS-based Normalized Difference Water Index (NDWI); other relevant environmental, vegetation, remotely sensed, and geophysical drivers; and artificial intelligence/machine learning techniques. A total of 19,415 AIM plots from years 2016 – 2021 were used to train an ensemble of five-fold regression-tree models using a cross-validation approach (each observation was used as test data once) that developed all the fractional cover maps. The geographic coverage includes arid and semi-arid rangelands in the western U.S at or below 2350-m elevation. Note: Maps of May 6th, 2022 were developed using satellite observation data no later than April 29. Maps of May 18th, 2022 were developed using satellite observation data no later than May 13. Maps of June 3rd, 2022 were developed using satellite observation data no later than May 27. Maps of June 15th, 2022 were developed using satellite observation data no later than June 11. Maps of July 1st, 2022 were developed using satellite observation data no later than June 23. First release: 2022 Revised: May 17, 2022 (ver. 2.0) Revised: May 25, 2022 (ver. 3.0) Revised: June 03, 2022 (ver. 4.0) Revised: June 15, 2022 (ver. 5.0) Revised: July 01, 2022 (ver. 6.0)
num_resources 2
num_tags 47
title Early Estimates of Exotic Annual Grass (EAG) in the Sagebrush Biome, USA, 2022 (ver 6.0, July 2022)