> For the complete documentation index, see [llms.txt](https://terradapt.gitbook.io/terradapt-cascadia-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://terradapt.gitbook.io/terradapt-cascadia-documentation/methods-and-validation/rangeland-fractional-cover/training-data.md).

# Training Data

We used US Bureau of Land Management (BLM) [Assessment, Inventory, and Monitoring](https://www.blm.gov/aim) (AIM) field data as empirical observations of fractional rangeland vegetation cover. Specifically, we extracted the values of sagebrush (AH\_SagebrushCover\_Live), shrub (AH\_NonNoxShrubCover), perennial grass (AH\_NonNoxPerenGrassCover), and invasive annual grass cover (AH\_NoxAnnGrassCover) for all locations within our modeling boundary. In total, our training dataset contained field plot measurements from 932 locations spanning the years 2015-2020.