BIOGRAPHY

Mohd Zahlan Mohd Zaki
Mohd Zahlan holds M.Sc in Satellite Surveying and B.Sc (Hons) in Remote Sensing from UniversitiTeknologi Malaysia. Prior to joining Sime Darby as a Scientist in 2008, he was a Research Officer in Dept. of Geomatic Engineering, UTM. In 2010, he was promoted as Senior Scientist in Technology Transfer & Advisory Services Division. His areas of expertise include Digital Image Processing, GIS for plantation management, Oil palm yield forecasting, GPS-Meteorology, and Satellite Altimetry.

Abstract
Remote Sensing Digital Elevation Models (DEMs) Applications for Effective Planning and Management of Oil Palm Plantation
An oil palm plantation is located not only in flat areas but also on marginal areas with hilly terrain. In order to effectively manage plantations, precise representation of surface elevationis requiredto support decision making and problem solving. Traditionally, elevation data was obtained from examination of contour lines in topography map sheetswhich areoftenderived from stereographic interpretation of aerial photographs or conventional ground survey.With advancementin geospatial technology, Remote Sensing Digital Elevation Models (DEMs) becomethe more practical choice for itspixel based format make it easier to be process.Depending on subject matter requirement, the selection for proper source of DEMs is crucial to ensure balance between the cost and accuracy. This paper presents some on-going works carried out by Sime Darby Research SdnBhdin utilisingDEMs from several sources such as Shuttle Radar Topography Mission (SRTM), Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER-GDEM), NextMAPInterferometric Synthetic Aperture Radar (IFSAR), and Airborne Light Detection and Ranging (LiDAR)for planning and problem solving. The potential of survey and mapping based Unmanned Aerial System (UAS) for topography mapping are also discussed based on accuracyassessmentcarried out. In summary, proper usage of DEMs should provide the plantation industry with accurate, prompt and useful allowing better recommendations and solutions to terrain related issues.
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