[mapserver-users] Split Polygon using Clint or server side code not with PostGIS

[venkat]

Dear Josh,

 Thanks for your great response.Yes You done my work around... Thanks
alot..Let me work on that...i will update you once i done ...

Thanks again.

Ven

On Tue, Sep 7, 2010 at 4:11 PM, Joshua Hevenor <jhevenor at rogers.com> wrote:

> Ven,
> First,  I took a quick look at the php mapscript documentation (my
> preferred mapscript) and didn't see anything specific about splitting.
> Solving a more simplified problem might be a start.
>
> Start by getting the bounding box of the polygon ($shp->bounds).
> Get the two left side coordinates: $p1=(MinX, MaxY), $p2=(MinX, MinY)
> Build a new polygon using these two points and the endpoints of your line.
> --> Assumption that your line is not horizontal or intersects the left edge
> of your bbox.
>
> Use the shapeObj::intersection to get the half of your target polygon
> within the left half of the BBOX.
>
> You can repeat this for the right half of the BBOX, or maybe use
> shapeObj::difference.
>
> My first thoughts.
>
> You could, alternatively, loop through all of
> $shp->lines(1..$shp->numlines) and checking for intersection with your split
> line. A little bookkeeping would allow you to build your two split polygons
> from this.  I think option 1 might be easier.
>
> Hope this helps,
>
> Josh
>
> --- On *Tue, 9/7/10, venkat <ven.tammineni at gmail.com>* wrote:
>
>
> From: venkat <ven.tammineni at gmail.com>
> Subject: [mapserver-users] Split Polygon using Clint or server side code
> not with PostGIS
> To: mapserver-users-request at lists.osgeo.org,
> mapserver-users at lists.osgeo.org
> Date: Tuesday, September 7, 2010, 1:46 AM
>
>
> Dear All,
>
>    How i can split polygon by client(JavaScript code) or Server side(C#).I
> have done splitting polygon using Postgis..I am not able to understand how
> to split polygon by code(client or server side code.Please let me know .Its
> very urgent.
>
>  I am waiting for your great response.
>
> Thanks and Regards,
>
> Ven
>
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