So I'm getting a couple of different messages here . . . . let me show you what I've done using Manifold personal edition. I've clipped a set of contours (shapefile attached). The scale of the contours is 1:50,000. I am trying to generate a DEM appropriate for a similar scale.
So, I've tried generating a DEM by first generating points from the contours, then pasting the points as a surface, using kriging (the only option available) and playing around with the other parameters. Most seem to come out something like this:
This took about 1 1/2 hours to produce. I also tried using Voronoi neighbours with not much more success. This is what I got:
This I had to let run overnight. I suspect it took about 6 hours.
This DEM is freely available and doesn't require any processing:
but as you can see, there are some issues with the content and the resolution is just not sharp enough.
Obviously, neither option is a viable solution since I need a better quality DEM (300 dpi at 1:50,000, appropriate for printing). The processing time is far too long anyway since the area I'm looking at for processing runs to about 2 degrees x 1 degree.
So my question is: first off, can I generate the DEM at the quality that I want using 1:50,000 contours (i.e. better than what I've done)? Secondly, what is the best and quickest way of doing this in Manifold (personal or professional edition)?