Truncation of double precision to floating point when rendering.
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
When rendering double precision data of 7 digits or more (e.g. Northings) the renderer seems to internally convert the data to floating point.
I am attaching two .vtp file which illustrate the problem.
NavXYZSRealCoords.vtp has double precision data where the x-coordinate is 7 digits. When you plot this you will see a characteristic banding pattern on the lines indicating that the data is being subsampled to a lower precision when plotted.
NavXYZSNear000.vtp is the same data rescaled so that it is close to zero in the x- and y- axes. Here the plot is what we would expect.
You can display these in ParaView to see the effect.
NavXYZSRealCoords.vtp Bounds: (xmin,xmax,ymin,ymax,zmin,zmax) = (6167887.194354,6167937.979982,229956.716889,229999.075954,-642.855049,-641.947788) Number of points: 74548 Scalar range: (0.008196,0.030176)
NavXYZSNear000.vtp Bounds: (xmin,xmax,ymin,ymax,zmin,zmax) = (-69.882646,-19.097018,16.275889,58.634954,-13.864049,-12.956788) Number of points: 74548 Scalar range: (0.008196,0.030176)