[mapserver-users] Point in polygon

[truongpm]

Thanks Steve, I trying with MySWL Spatial extension. 

Steve Lime wrote:
> 
> I know if you were in PostGIS you could do a spatial join of sorts. That
> is join
> each commune polygon with the points it contains (or just a count) based
> on 
> an intersection operator. I don't know if that's possible with MySQL or
> not.
> 
> You could also consider pre-processing your data if it doesn't change
> often. 
> A simple MapScript script could be used like so:
> 
>   - for each commune geom
>     - build a shapeObj
>     - do a queryByShape() against the point data
>     - store the count in the appropriate commune record 
> 
> You might have to pull the park data into something MapServer can query.
> With the count in the commune data you could easily classify on that
> attribute. You'd see better performance as well.
> 
> Some ideas anyway.
> 
> Steve
> 
>>>> truongpm <truong_pham_minh at yahoo.com> 09/22/09 2:13 AM >>>
> 
> Hi list,
> 
> I have a problem with defined a point is in which polygon. For example, a
> map have 2 layer: commune-polygon; park - point.
> I want to layout color of polygon (each commune) depend on amount of point
> in this polygon.
> 
> I done with query polygon from mySQL database, layout its color base on an
> attribute in database.
> 
> My question is that how could i know which polygon that point inside???
> 
> Thanks for your attentions and sorry about my language skills.
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