[postgis-users] Evenly distributing a point set

Nicolas Ribot nicolas.ribot at gmail.com
Sun Jan 25 13:32:20 PST 2015


You could build the linestring from points (makeLine(geom order by time))
then , with linear referencing (st_lineInterpolatePoint,
st_linelocatePoint), you can divide your linestring by the distance you
want, creating new points.
Then, if you need to keep time information, you could interpolate time from
initial segment where a new point lies in.


On 25 January 2015 at 12:54, Dave Barter <dave at phased.co.uk> wrote:

> If I had a table of points which are irregularly distributed and wanted to
> evenly distribute them what would be the best strategy and query?
> These points were created from a GPX file along a road journey so they
> crudely map to a line string.
> I was thinking compute the KNN distance for each point and remove those
> that have a KNN < a threshold (say 100 metres)
> Is that the best way to go about it?
> --
> Dave Barter
> Web: http://www.phased.co.uk
> Email:dave at phased.co.uk
> Twitter:@Citizenfishy
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