Paul- Yes, there was a bug introduced to Map and subsequently fixed Apr 17 2000 , see http://opendx.watson.ibm.com/cgi-bin/dx/cvsweb/dx/src/exec/libdx/trisRI2D.c
There is no "4.1.1" mark in cvs and no "4.1.1" tarball, so I can't tell you if a binary labelled 4.1.1 will have the bug or not. Compare dates, perhaps. Building fresh from our cvs would definitely address the problem. Pete Paul Docherty wrote: > I am experiencing differences in the behavior of the routine DXInterpolate > with version 4.1.0 on linux, compared to version 3.1.4 on ibm. > > The difference occurs with 2-D triangulated surfaces. In 3.1.4, if the test > point is > outside the boundary of the surface then it is not interpolated. > In version 4.1.0, the behavior appears to be: return an interpolated value > if the > test point lies within the (rectangular) bounding box of the surface. In > other words, > DXInterpolate may extrapolate beyond the boundary of an irregular surface. > > I have seen similar behavior from the Map module in version 4.1.0 when > mapping from > one triangulated surface to another (the output of the module is a > rectangle, i.e. the shape > of the surface to which the map is applied is lost). > > Is there any way around this? > > Cheers, > Paul Docherty > > Sr. Research Geophysicist > Fairfield Industries > 14100 SW Freeway, Suite 100 > Sugar Land > TX 77478 > (281) 275 7590 > [EMAIL PROTECTED]
