[OpenLayers-Users] Edit a "freehand polygon"

[Tim Schaub]

Hey-

Swärd Mårten wrote:
> Hello!
> 
> I need some functionality that makes it possible to edit the points in a 
> freehand drawn polygon. I know that it’s tecnicaly possible to do this 
> but in real life the edit function, as I know it, is very time 
> counsuming to use due to the many points that has to be modified. The 
> two questions that I have are as follows:
> 
> A) Is it possible to change the edit function so that when you edit one 
> point the naigbor points follows.. And so to say smoothen the curve of 
> the edited point relative to the rest of the points..
> 
> B) If the answer is a big NO on A. =) Is it possible to reduce the 
> number of points that is drawn when using the freehand mode?

This would be an easy modification.  The draw feature control could take 
a tolerance property in the handlerOptions and addPoint would only get 
called in freehand mode when the tolerance was met.

> 
> B II) Or is it possible to reduce the number of points on a polygon 
> after you have drawn it?

This would require a simplify (Douglas Peucker style) method for 
geometries.  If there is interest in building a library of more advanced 
geometry operations client-side, it might do well as a compliment to 
OpenLayers (not in OL itself).  I'm interested in this.

Tim

> 
> Best regards: Mårten
> 
> 
> ************************************************************************
> 
> *Mvh:*
> 
> Mårten Swärd
> 
> Systemutvecklare/Webbutvecklare, ITs
> 
> SMHI, Sveriges Meteorologiska och Hydrologiska Institut
> 
> Tel: +46 11 495 8469
> 
> !DSPAM:4033,47b03037265381431913854!
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