GLA 2.0 is imaging software used to extract forest canopy structure and gap light transmission indices from true-color hemispherical photographs
Features- Scientific software (Windows 95/98/NT) to import, display, and analyze digital hemispherical canopy images.
- Includes "region of interest" image-processing functions: e.g., image threshold, brightness, contrast, colour fill, etc...
- Designed to process large numbers of photographs taken from numerous sites—individual configurations can be created for different camera lenses and orientations, regional climatic patterns and growing seasons, and topographic settings.
- Extracts canopy structure data (gap fraction, canopy openness, effective LAI) and gap light transmission indices. Also provides a number of stand-alone utilities that will compute and display daily extraterrestrial radiation, sunfleck duration and frequency distribution, solar positions and intensities, and sky-region brightness.
- view screenshot
Gordon W. Frazer , SFU, Burnaby, B.C.
Dr. Charles D. Canham, Institute of Ecosystem Studies, Millbrook, New York
Dr. Pamela Sallaway, Spatial Solutions, Inc., Victoria, B.C.
Dimitri Marinakis, UVic, Victoria, B.C.
Forest Renewal BC Research Grant to:
Dr. Kenneth P. Lertzman, SFU, Burnaby, B.C.
Copyright © 1999: SFU, B.C. and the Institute of Ecosystem Studies, New York.