Hi Pradeep I don't know what you exactly mean by midpoint of a MULTILINESTRING. If what you are looking for is the point on the multilinestring located half way on a imaginary linestring that have the total length of the MULTILINESTRING and is formed by sewing together constituent linestrings I can write a function that do this. Must it fill the gaps between end point of first linestring and start point of second linestring (i.e. consider the space between consecutive linestrings as part of this imaginary linestring)? If you have any other detail about the function you want tell me.
Rodrigo. On 6/21/07, Pradeep B V <[EMAIL PROTECTED]> wrote:
Is there any other function equivalent to the line_interpolate_point(the_geom, 0.5) to find the midpoint of a MULTILINESTRING? the line_interpolate_point works only with LINESTRINGS. - Pradeep B V www.btis.in On 6/21/07, Rodrigo Martín LÓPEZ GREGORIO <[EMAIL PROTECTED]> wrote: > > Hi Matt. > > I think what you want may be: > > line_interpolate_point(the_geom,0.5) > > (or ST_line_interpolate_point(the_geom,0.5) depending on your Postgis > version) > > where the_geom is a linestring and 0.5 means half of the total 2d length > of the linestring. > > You can reed more details in the documentation: > > http://postgis.refractions.net/docs/ch06.html#line_interpolate_point > > Rodrigo > > On 6/21/07, Matt Doughty < [EMAIL PROTECTED]> wrote: > > > > Hi List, > > > > > > > > Is there a function in PostGIS that finds the midpoint of a line? > > > > > > > > Matt > > > > > > > > > > > > > > > > Matt Doughty > > > > GEOGRAM A S.L. > > > > Tel.: +34 945 13 13 72 652 77 14 15 > > > > Fax: +34 945 23 03 40 > > > > www.geograma.com > > > > > > > > > > > > _______________________________________________ > > postgis-users mailing list > > [email protected] > > http://postgis.refractions.net/mailman/listinfo/postgis-users > > > > > > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > > _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
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