For an introduction to the ORA method and its benefits, we recommend the paper by Rogier Ralph Floors et al - "From lidar scans to roughness maps for wind resource modelling in forested areas". It is available as an open access paper from the Wind Energy Science journal, available freely here: DOI or DTU-Orbit (pdf).
When using the forest maps and tree heights, you must manually consider the accuracy of the dataset used. You can do this by accessing and inspecting recent orthophotos or satellite images (which could be the windPRO European Satellite Imagery or the Global Satellite Imagery).
Pages in category "Forest Maps"
The following 8 pages are in this category, out of 8 total.