----Original Message----
>
>Personnaly I use VM and find the interface (version 2.0) quite OK, but
>the interpolation algorithms yield surprising results : when
>transforming contour lines (say elevation 1,2,3,... to 10) into points
>and creating a grid surface based on these points, the cell values
>distribution is incredibly "SPIKY", with huge concentrations of cell
>values around integer values (while we could expect a smooth
>distribution from regularly spaced contour lines).
>
>Personnaly I use VM and find the interface (version 2.0) quite OK, but
>the interpolation algorithms yield surprising results : when
>transforming contour lines (say elevation 1,2,3,... to 10) into points
>and creating a grid surface based on these points, the cell values
>distribution is incredibly "SPIKY", with huge concentrations of cell
>values around integer values (while we could expect a smooth
>distribution from regularly spaced contour lines).
>
>I tried to get some feedback from NorthwoodGeo on that
matter and it's
>good to know that they let three of my Emails unanswered. They,
>apparently, are not very concerned with their customers and/or unabled
>to give comment or (or dismiss) possible flaws of their products.
>good to know that they let three of my Emails unanswered. They,
>apparently, are not very concerned with their customers and/or unabled
>to give comment or (or dismiss) possible flaws of their products.
Francois:
I assume that the "SPIKY" behaviour you are speaking of is that shown in the
histogram displayed in the Colourizer dialogue. If this is the case, then
the spikiness is really just an artifact of the default histogram interval
used in the graph function. As you know, with histograms, it is possible to
get very different looking graphs of the same data simply by adjusting the
width of the sampling interval. This could be improved by allowing the
user to set the number of intervals as desired. We'll consider this for the
future.
Our records showed that a response was made to you concerning this issue on
Sunday May 3 1998. Perhaps you missed that reply. Note that we have
recently implemented a new tracking system to improve our technical support.
Registered users should contact tech support at [EMAIL PROTECTED]
with any problems or queries.
I assume that the "SPIKY" behaviour you are speaking of is that shown in the
histogram displayed in the Colourizer dialogue. If this is the case, then
the spikiness is really just an artifact of the default histogram interval
used in the graph function. As you know, with histograms, it is possible to
get very different looking graphs of the same data simply by adjusting the
width of the sampling interval. This could be improved by allowing the
user to set the number of intervals as desired. We'll consider this for the
future.
Our records showed that a response was made to you concerning this issue on
Sunday May 3 1998. Perhaps you missed that reply. Note that we have
recently implemented a new tracking system to improve our technical support.
Registered users should contact tech support at [EMAIL PROTECTED]
with any problems or queries.
James Harvie
Vertical Mapper Product Manager
Northwood Geosience Ltd.
43 Auriga Drive, K2E 7Y8
Nepean, Ont, Canada
613-224-2020
Vertical Mapper Product Manager
Northwood Geosience Ltd.
43 Auriga Drive, K2E 7Y8
Nepean, Ont, Canada
613-224-2020
