[gdal-dev] densify line?

[Frank Warmerdam]

Matt Wilkie wrote:
> Hello All,
> 
> Does ogr have a densify line option or utility?
> 
> The goal is to densify (add vertices at regular intervals) to a 1 
> dergree by 1 degree fishnet grid before projecting from WGS84 to UTM (or 
> whatever) so the result follows earth curvature rather then jumping 
> straight from corner point to corner point.
> 
> I could use Arcinfo DENSIFYARC, but would like to avoid having to 
> convert to a coverage if I can.

Matt,

No, no such capability exists in OGR to the best of my knowledge.

The Value() method on OGRCurve might be helpful to identify points along
a line string at particular distance intervals.

/**
  * \fn void OGRCurve::Value( double dfDistance, OGRPoint * poPoint ) const;
  *
  * Fetch point at given distance along curve.
  *
  * This method relates to the SF COM ICurve::get_Value() method.
  *
  * @param dfDistance distance along the curve at which to sample position.
  *                   This distance should be between zero and get_Length()
  *                   for this curve.
  * @param poPoint the point to be assigned the curve position.
  */

If someone were inclined to implement it, I think a Densify() method
on OGRGeometry would be nice.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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