On 23 November 2013 05:50, Ani Alamo wrote:
> Uhm... exactly I have this linestrings:
> LINESTRING(2.118932325 41.398745991,2.168720219 41.385631938)
> LINESTRING(2.142346041 41.398526436,2.81541 41.409216161)
>
> intersections gives me:
> GeometryCollection: GEOMETRYCOLLECTION EMPTY
>
> inter
ST_Relate() is an interesting and versatile function: http://postgis.org/docs/ST_Relate.html
(also illustrated at http://workshops.boundlessgeo.com/postgis-intro/de9im.html
)
But maybe your problem is one of tolerance/roundoff-error
On 22/11/2013 8:17 AM, Ani Al
I hope you are not runnning into a very annoying precision issue.
If it were the case, you may want to try the patch I just submitted to
GEOS, (https://github.com/Remi-C/libgeos).
and then you would check like this :
decompose line A into points (ST_DumPPoints)
if any point is on line B : true
el
You may try
http://postgis.net/docs/ST_SharedPaths.html
Cheers,
Rémi-C
2013/11/22 Ani Alamo
> I tried this function:
> intersects(buffer(LINESTRING1, 0.001), buffer(LINESTRING2, 0.001))
> Always gives me "false" result.
>
> I don't know what to do!
>
>
> 2013/11/22 Ani Alamo
>
>> Uhm... exac
I tried this function:
intersects(buffer(LINESTRING1, 0.001), buffer(LINESTRING2, 0.001))
Always gives me "false" result.
I don't know what to do!
2013/11/22 Ani Alamo
> Uhm... exactly I have this linestrings:
> LINESTRING(2.118932325 41.398745991,2.168720219 41.385631938)
> LINESTRING(2.14234
Uhm... exactly I have this linestrings:
LINESTRING(2.118932325 41.398745991,2.168720219 41.385631938)
LINESTRING(2.142346041 41.398526436,2.81541 41.409216161)
intersections gives me:
GeometryCollection: GEOMETRYCOLLECTION EMPTY
intersects gives me:
false
but when I see the line drawn on map
Hi Ani,
Have you looked into st_intersects() ? and st_intersection() ?
http://postgis.refractions.net/docs/ST_Intersects.html
James
On 22 November 2013 16:17, Ani Alamo wrote:
> Hi!
> I need a specific function to get if two linestring overlaps. e.g.
> Linestring 1 is Point (0, 0) : Point (10,
Hi!
I need a specific function to get if two linestring overlaps. e.g.
Linestring 1 is Point (0, 0) : Point (10, 0) Linestring 2 is Point (0, 0) :
Point (3, 0)
In this case I need "true" result because LineString 1 overlaps in
different points like 0,0 1,0 2,0 & 3,0. I dont need the common points,
