[postgis-users] Linear Referencing: Create Measure

[strk at refractions.net]

Maybe we can add such a function, but semantics must be exactly
defined. How are 'from' and 'to' defined ? How are they applied
to different types of geometries ?

--strk;

On Thu, Jun 29, 2006 at 11:43:44AM +0100, Düster Horst wrote:
> I'm faced with the problem to create MGeometries for using with the "Linear
> Referencing" functions of PostGIS. I like to create the measures defined by
> two table attributes meas_from and meas_to. In further versions of Christoph
> Spoerri's LRS functions there exists a function
> lrs_create_measure(geometry,from,to). As the result the M-Values were
> interpolated based on a start and a stop value of each line. The new
> functions don't offer such a functionality. I would be greatful for any hint
> how to create measures along a line referenced by a from and a to value of
> this line.