RES: [Mapserver-users] Map interpolation

Murilo Lacerda Yoshida murilo.yoshida at
Tue May 25 17:06:00 EDT 2004

  Hi again,

  I looked at the openEV documentation and apparently openEV only does
interpolation for raster images...
  Frank, do you know a way or a tool that does the automatic
generalization of the shape files (vector data)?
  And I searched at the google, I couldn't find a tool that would do
interpolation with vector data as input... I'm beginning to think that
there is no such thing...

-----Mensagem original-----
De: Murilo Lacerda Yoshida [mailto:murilo.yoshida at] 
Enviada em: sexta-feira, 21 de maio de 2004 17:23
Para: 'Frank Warmerdam'; (mapserver-users at; 'Tyler
Assunto: RES: [Mapserver-users] Map interpolation

  Frank, Tyler,
  What I want to do is this automatic generalization of vector data.
Actually the best solution would be to generate a raster data from a
vector data.
  I have a map with several polygons. Each polygon has a data associated
with it, population, for example. I guess that to do the raster data
from vector data I would have to size down my polygons, until they had
the size of a pixel, but that would have too much cost, since the
polygons I have on the map are created dynamically...
  I don't know if openEV has this kind of stuff implemented... it would
be of great help...
  Anyway, if I could stop the process of sizing down the polygons before
they reached the pixel size I guess that would be nice too.

-----Mensagem original-----
De: Frank Warmerdam [mailto:warmerdam at] 
Enviada em: quinta-feira, 20 de maio de 2004 01:41
Para: murilo.yoshida at
Assunto: Re: [Mapserver-users] Map interpolation

Murilo Lacerda Yoshida wrote:
>   Hi all,
>   I wanted to know if mapserver does map interpolation. If not, do you

> know a open source tool that does it?


"Map interpolation" is a pretty general term in my opinion.  What
are you looking for?  Automatic generalization of vector data?  Smooth
interpolation of raster data during oversampling?

Best regards,

I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at
light and sound - activate the windows |
and watch the world go round - Rush    | Geospatial Programmer for Rent

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