1. 2007-present. “Investigation on river turbidity and its influential factors based on Geo-information technology and hydrological method within Hitotsuse and Kamishiiba watershed areas, Miyazaki prefecture, Kyushu, Japan”. Purnama B Santosa, Yasuhiro Mitani, Toru Shibata, Mei Guo, Hiroshi Dan. Kyushu University and Kyushu Electric Company.
  2. 2007-2008: Principal-Investigator.GIS approach to Spatial Multicriteria Analysis for land suitability analysis (Case study: Housing site suitability assessment). Dana Penunjang Pendidikan (DPP) Fak Teknik UGM Research Grant Th 2007. P. B. Santosa and Leni Sophia Heliani.
  3. 2006-2008: Co-Investigator. “A Collaborative Geospatial Infrastructure: Facilitating Coordination and Group Work in Disaster Management”. Japan International Cooperation Agency (JICA) Hi-Link Research Grants 2006-2007 and Kyusyu University Research Grants 2007-2008.
  4. 2006-2008: Co-Investigator. “The Construction of the Strategy for Earthquake Disaster Preparedness Village Design in order to Revitalize Villages with House-Scale Industries”. Japan International Cooperation Agency (JICA) Hi-Link Research Grants.
  5. 2006-2007: Principal-Investigator. “The improvement of land data management in the National Land Agency of Bantul District by developing Land Information Systems and the improvement of capacity building”. Bussino Research Grant, BATCH IV DUE-Like Project 2006, University of Gadjah Mada. P. B. Santosa, Subaryono, and Istarno.
  6. 2006-2007: Principal-Investigator. “The existing condition evaluation of the Corporate Spatial Data Infrastructure (CSDI) of the Bantul District Land Office towards the implementation of the Parcel Based Geo-Information Systems (PBGIS)”. Dana Penunjang Pendidikan (DPP) Fak Teknik UGM Research Grant Th 2006. P. B. Santosa and Istarno.
  7. 2005 : Principal-Investigator. “Flood prediction modelling using Artificial Neural Networks and GIS”. Master Thesis. P. B. Santosa
  8. 2003: Principal-Investigator. “Landuse classification of the coastal areas based on Landsat TM images. Case study: Cairns, Australia”.
  9. 2003: Principal-Investigator. “GIS based rainfall interpolation in Gippsland, Australia”. P.B. Santosa and Annabelle G. Verdote
  10. 2002: Principal-Investigator. “Aspects of Virtual Environments”. P.B. Santosa and Zhong Zhao.
  11. 2002: Principal-Investigator. “Evaluation DEM Development and Implications for Landuse Suitability Modelling in Gippsland, Australia”. P.B. Santosa
  12. 2001: Principal-Investigator. “Evaluation of the differences of digital maps in vector and raster format.”. Dana Penunjang Pendidikan (DPP) UGM Research Grant Th. 2000/2001. P.B. Santosa.
  13. 2000: Principal-Investigator. “The variation of area errors resulted from digitations with various value of RMSE”. Dana Penunjang Pendidikan (DPP) UGM Research Grant Th. 1999/2000. P.B. Santosa.