Re: [postgis-users] LinearReferencing: measure vertex of linestring?

2012-04-03 Thread Andrés Maneiro
http://trac.osgeo.org/postgis/ticket/1747 ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users

Re: [postgis-users] LinearReferencing: measure vertex of linestring?

2012-03-28 Thread Sandro Santilli
On Wed, Mar 28, 2012 at 06:22:28PM +0200, Andrés Maneiro wrote: LINESTRINGM(1 0 1,2 0 2,4 0 4) What I'm wondering is if somehow I could calibrate the vertex of the linestring, having as a result, for example, this route: LINESTRINGM(1 0 1,2 0 *1.7*,4 0 4) See ST_SetPoint

Re: [postgis-users] LinearReferencing: measure vertex of linestring?

2012-03-28 Thread Andrés Maneiro
On 28/03/12 18:26, Sandro Santilli wrote: On Wed, Mar 28, 2012 at 06:22:28PM +0200, Andrés Maneiro wrote: LINESTRINGM(1 0 1,2 0 2,4 0 4) Oh, I get it. And there is a native way in postgis to calibrate the line from a given set of measured points instead of using the ends? -- If I

Re: [postgis-users] LinearReferencing: measure vertex of linestring?

2012-03-28 Thread Stephen Woodbridge
On 3/28/2012 1:26 PM, Andrés Maneiro wrote: On 28/03/12 18:26, Sandro Santilli wrote: On Wed, Mar 28, 2012 at 06:22:28PM +0200, Andrés Maneiro wrote: LINESTRINGM(1 0 1,2 0 2,4 0 4) Oh, I get it. And there is a native way in postgis to calibrate the line from a given set of measured points

Re: [postgis-users] LinearReferencing: measure vertex of linestring?

2012-03-28 Thread George Silva
I guess the best way to do this is to combine the actual line and a virtual line, probably a view, with measured points. This involves a bit of thinking but it might be possible. George On Wed, Mar 28, 2012 at 3:03 PM, Stephen Woodbridge wood...@swoodbridge.com wrote: On 3/28/2012 1:26 PM,

Re: [postgis-users] LinearReferencing: measure vertex of linestring?

2012-03-28 Thread Paul Ramsey
Create a ticket describing the calibration, that's useful info and would be a good utility for LRS users for a future version. P. 2012/3/28 Andrés Maneiro amane...@icarto.es: Hello people, I'm reviewing what postgis is able to do in terms of Linear Referencing. As fas as I could see, to