Journal of Geospatial Sciences and Technology (JGST) is a national and international peer-reviewed journal published by Department of Earth Technology, Vocational College, Universitas Gadjah Mada and covers all aspects and information on scientific and technical advances in geospatial sciences and technology. Journal of Geospatial Sciences and Technology publishes high quality, peer-reviewed scientific papers, unique contributions in geospatial application ranging from the integration of instruments, methodologies and technologies and their application in the earth sciences, engineering, and other natural sciences. We expect the author who submitted in our journal to certify that the paper is original, has not been published before, and is not being considered for publication elsewhere.