Firstly, the location of the study area identified in Google Earth, divided into thirty-six areas and marked using provided mark functions in Google Earth. The result shows that, the percent difference of the watershed boundary is 0.19% by using Google Earth’s elevation data as it compared with the same watershed area which delineated using 20 meter interval contour data obtained from JUPEM (Department of Survey and Mapping Malaysia). This paper proposes an alternative method of generating DEM by using online source of elevation data which is easier and free. However, this information severely limited, and most users rely on published topographic maps or DEMs produced by government agencies. ![]() Topographic data or DEMs are commonly perceived as providing loaded information for hydrological modelling.
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