On January 01, 2022 the Rangeland Analysis Platform updated cover and biomass datasets to version 3.0.
Why a new version?
RAP updates occur every two years. The 2022 update was moved up due to the deprecation of Landsat Collection 1, which occurred December 31, 2021.
What is new in version 3.0?
Primary changes include:
- Use of Landsat Collection 2
- Addition of the National Park Service Northern Colorado Plateau Network (NCPN) monitoring data for cover training
- Identify agriculture, development, and water
- Addition of the eastern states
|Cover 1.0||Cover 2.0||Cover 3.0|
|Model||Random Forest||Convolutional Neural Network||Convolutional Neural Network|
|Data||31,300 plots||57,792 plots||74,966 plots|
|Landsat measurements||3; seasonal averages||12; 64 day averages||12; 64 day averages|
|Predictors||40; variable per group||10; Landsat based||10; Landsat based|
|Prediction pipeline||Google Earth Engine||Google Earth Engine & AI Platform||Google Earth Engine & AI Platform|
Cover error metrics
|Vegetation cover||Annual forb and grass||Perennial forb and grass||Shrub||Tree||Litter||Bare ground|
|Mean absolute error (%) cover 3.0||7.0||10.2||6.2||2.6||5.7||6.5|
|Root mean square error (%) cover 3.0||11.0||14.0||8.8||6.7||7.8||9.6|
|Mean absolute error (%) cover 2.0||7.0||10.3||5.8||2.8||5.7||6.7|
|Root mean square error (%) cover 2.0||11.0||14.0||8.3||6.8||7.9||9.8|
|Mean absolute error (%) cover 1.0||7.8||11.1||6.9||4.7||-||7.3|
|Root mean square error (%) cover 1.0||11.8||14.9||9.9||8.5||-||10.6|
Biomass 3.0 uses cover 3.0 for functional group partitioning. Minor alterations were made to improve biomass partitioning and estimates.
How often will RAP be updated?
Major version updates (e.g., 2.0 to 3.0) will be assessed on a two year cycle, and will occur if there are significant changes, i.e., model changes, additional features, etc. The entire time period will be produced to ensure consistency. Previous major versions will be produced and maintained for one year after updating.