“Vegetation Analysis in the Desert Using Satellite Imagery”
a free webinar by DigitalGlobe
Wednesday, September 24, 2014
2:30:00 PM EEST – 3:30:00 PM EEST (12:30 pm GMT)
Speaker: Richard Flemmings, Proteus Project Manager
Abu Dhabi has planted areas totalling nearly 20 million trees that provide aesthetic and environmental benefits throughout the Emirate. Comprised of gaff, acacia, mesquite, and other species, these plantations require continuous irrigation with desalinated water at considerable expense.
As an extension of an Emirate-wide habitat and land use/land cover (LULC) mapping project, Proteus was asked to lead a team to use WorldView-2 satellite imagery to inventory tree plantations. Image processing techniques were deployed using all eight WorldView-2 multispectral bands plus one panchromatic band, with an emphasis on the mid-infrared spectra. This multi-step processing was able to depict all trees greater than 1m2 in size, and distinguish several tree species by their individual canopies. Levels of stress could also be detected, possibly related to irrigation, salinity or infestation issues, in some of the trees.
Compared to the traditional ways of monitoring tree plantations in the area, which implies visual detection of damaged/dead trees, remote sensing offers a cost-effective alternative. This project demonstrates the viability of using very high-resolution multispectral data to establish a baseline inventory of tree type and health within diverse forest plantations. The tree mapping technique used here can be applied to create forest inventories of other species elsewhere in the world.
This case study presentation will focus on the methodologies that are being deployed and provide examples of the maps that have been produced so far.