A Java application for quality weighted 3-d interpolation

iw3d is a tool for 3-d interpolation of scattered data. The program is endowed with a user-friendly graphical interface. The interpolation-algorithm is a modified version of the inverse-distance weighting method. It has the capability for a quality-weighted interpolation. The interpolation can be carried out with a sector-search approach for reducing clustering effects. A semivariogram is calculated for the three cartesian main directions to give an estimate for a selectable search-distance. Tests of the program with a synthetic 3-d data set and a large set of measured subsurface temperatures with different qualities show good results.iw3d is programmed with Java (TM) and is a GPL licensed open source. It has been successfully tested with different Java versions on Microsoft Windows, Sun Solaris and on several Linux distributions.The current version is available at http://geomath.onlinehome.de/iw3d/.