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Personal biography

Junji Yamakawa (a.k.a. jyamrd). Born in 1966 in Okayama prefecture, Japan. Graduate the Okayama prefectural Tamashima High school in 1985. Graduate the Okayama University in 1989. Get a doctor degree from the Graduate school of Natural Science and Technology, Okayama University in 1993 (Doctor of Science). Work on the Department of Earth Sciences, Faculty of Science, Okayama University as an assistant professor. A collector of the Rubber duckie.


Geostatistics. Especially, the estimation of the spatial distribution of the environmental materials by the Kriging method. The kriging method is performed by the combination of the QGIS, gdal and gstat/cmd or gstat/R. The data link of those applications by the geospatial file formats are also the object of the research.

OSGeo field

Mainly uses the GDAL, PROJ.4 and QGIS.

Contact Informations

  • e-mail: jyamrd(a)
  • twitter: @jyamrd