Point Cloud Analysis, DEM generation, DEM Analysis, Data Management / Handling, Software Suite
Tiffs (Toolbox for Lidar Data Filtering and Forest Studies) is a professional software that is highly automatic, very fast, and accurate in generating bare earth models, digital surface models, digital height models, and extracting forest information from individual trees to regional scales.
Tiffs was featured in the cover of the 2007 February issue of Photogrammetric Engineering & Remote Sensing (PE&RS), the official journal of photogrammetry and geospatial society in the U.S. The core algorithms in Tiffs have won a couple of prestigious awards including the Best Paper Award in the Remote Sensing Specialty Group of Association of American Geographer in 2005. Most of the algorithms are published in the peer-reviewed journal PE&RS. The filtering algorithm was validated with the benchmark dataset provided by ISPRS (the International Society of Photogrammetry and Remote Sensing). The comparison with the other well-known algorithms showed that our algorithm achieved the best overall accuracy. The tree isolation method used a conquer-and-divided strategy and has the advantages of minimizing both omission (missing trees) and commission (overcounting trees) errors. The canopy structure estimation is based on an innovative metric called canopy geometric volume, which has solid scientific roots in plant allometry.
filtering; DEM; CHM; individual tree analysis; area-based analysis; statistical modeling