[postgis-devel] Re: LRS functions

Christoph Spoerri cspoerri at cavtel.net
Tue Nov 29 10:45:00 PST 2005

Is there a greater plan for the types LRS functions that should be implemented 
or are desired by users? It seems some of the functions overlap in 
functionality and have different names. 

Is there a preference of naming the LRS functions?

I just wanted to avoid the duplication of efforts or re-inventing the wheel ;)


On Wednesday 23 November 2005 09:04, strk at refractions.net wrote:
> We've added two LRS functions with semantics
> specified by ISO SQL/MM:
> 	- locate_along_measure(geom, measure)
> 	- locate_between_measures(geom, m_start, m_end)
> Differently from Chris version the M values
> are not assumed to be consecutive, so an input
> LINESTRING can result in a collection of
> LINESTRINGS and POINTS in output.
> Polygons, multipolygons and collection types are
> NOT supported, all others are.
> In the process of finalizing semantics all comments
> and tests are welcome (in HEAD branch).
> --strk;
>  /"\    ASCII Ribbon Campaign
>  \ /    Respect for open standards
>   X     No HTML/RTF in email
>  / \    No M$ Word docs in email

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