TYContourKit

TYContourKit is a contouring and surface modeling package that runs under IOS. It is used for terrain modeling, landscape visualization, surface analysis, contour mapping, gridding, and much more.

Grid Interpolation (kd-tree searching mechanism)
• Type:
(1) Inverse Distance (IDW)
(2) Modified shepard
(3) Nearest neighbour
(4) RBF-ML
(5) Trend

Works for file formats:
• Scatter plot (*.txt, *.csv) (The points coordinates and attributes are automatically added to attribute table while importing Text file.)
• Binary golden software grid 6/7 (*.grd)
• ASC Arc/Info ASCII Grid (*.asc)
• USGS DEM (*.dem)

Tips: you can export grid file to cooperate with other software.