[postgis-devel] ST_GeometrySplit

[strk]

To add more thoughts, there are cases in which also
a single-segment "blade" against a single linestring
may return more than 2 parts:

     |  
  +--+---2
 1|  |  
  +--+---3
     |

Vertical line above is a single-segment "blade". 
Input is a single C-shaped linestring.
Numbers represent the components of output.

--strk;


On Wed, Mar 10, 2010 at 11:26:34AM +0100, strk wrote:
> Brain picking you guys about a ST_GeometrySplit.
> 
> The cases of interest seem to be:
>  - Split polygon by line
>  - Split line by line
>  - Split line by point
> 
> Initial questions:
>  - Should we allow multi-segment "blade" lines ?
>    (where a single polygon or line might be cut in multiple pieces)
>  - Should we allow multi-component inputs ?
>    (where the "blade" might cut a single component)
> 
> Both questions are related to the kind of returned output,
> that is: should output be always composed by 2 parts or
> possibly multiple parts ?
> 
> Comments welcome.
> 
> --strk;
> 
>   ()   Free GIS & Flash consultant/developer
>   /\   http://strk.keybit.net/services.html

-- 

  ()   Free GIS & Flash consultant/developer
  /\   http://strk.keybit.net/services.html