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project to determine the structural and environmental parameters governing the mode and magnitude of salient formation behind a submerged breakwater, remote sensing and GIS technique were used to assess the extent of erosion/accretion at Kerteh Bay, Terengganu, Malaysia and Palm beach, Florida, US. This paper will emphasize on the part of the study that highlights the accuracy of remote/GIS in measuring/detecting morphological changes in coastline. Multi-temporal LIDAR data of 0.6 m vertical accuracy and Multi-temporal Landsat satellite images of 30 m spatial resolution were acquired for these areas in US and Malaysia respectively. Triangulated Irregular Networks (TIN) were generated from the LIDAR data, profiles were measured and compared for the respective years in consideration. For the satellite images, a low cost methodology was used to extract the shoreline/waterline and an equiangular triangle model was used to correct for tides. Water level at the time the images were captured was acquired using hydrodynamic model. Analysis of the LIDAR data for the US showed that erosion occurred between the years 1999-2004 and accretion was observed between the years2004-2007. It was also observed remotely that accretion occurred for the entire length of the Malaysia beach for the years between 1995-1997. For the years between 2000-2004 erosion was observed to have also occurred and for the years between 2004-2009 both erosion and accretion occurred at different part of the study area. Validation was carried out by comparing values of the actual beach slopes measured and the calculated beach slopes