On Fri, 17 Jan 2003, Geraldine Cheok wrote:
> Hello, > > I am importing a regular grid into DX which goes to Rubbersheet. At the > same time, I am importing a set of points (separate file) which goes to > Autoglyph. I collect the output from both to Image. In the image, the > points are supposed to lie on the surface but the image shows the points > below the surface. Is there a different scaling for Rubbersheet and the > points and if so, how can I set the scaling so that both have the same scale? > > Thanks for any advice in advance. > I've run into this before. Rubbersheet (read the docs for this carefully) doesn't behave as you probably expected. I do what you are asking about, but my points (in the ocean) lie on or above the surface. Ensure the column you use for the Z values in rubbersheet (I have used 3D positions & 2D positions with a z attribute, & find the latter works better) has the same scale as your point data (obviously). Use the Scale module to control the aspect ratios in 3D of each, ie: the Scale module is in both parts of your net to ensure spatial synchronicity of both the glyph & surface model datasets. It may also be worth checking that the points you are plotting are actually included in the dataset from which you are deriving the surface model, as the triangulation algorithm used by DX may result in a surface which does lie slightly above your data point. Including them ensures the surface model will pass through that XY point at the appropriate z location. Cheers, Brent Wood
