On Sat, 2007-06-30 at 14:05 -0400, Jonathan Aguero wrote: > Listers > > I got a multilinestringM shape that I loaded into postgis without > problem (LRS). Then I used the linear referencing functions to create > the segments and curves tables from the tables (BTW, these linear > referencing functions rock!!!!). Now, my problem is that when I tried > to join the information on curves into the segments table using the > overlay function, it failed to detect several curves. Note that both > geometries (segments and curves) are generated from the same base > lines (LRS), therefore all curves should overlay one or more segments. > I am guessing I encountered a precision problem on GEOS but I wonder > whether my guess is correct and if there is any solution (maybe > snaptogrid). > > Thanks in Advance for your help > > PS: > > OS: Windows XP > > PGSQL: PostgreSQL 8.2.3 on i686-pc-mingw32, compiled by GCC gcc.exe > (GCC) 3.4.2 (mingw-special) > > Postgis: 1.2 > > GEOS: 3.0.0rc4-CAPI-1.3.3 > > > > > > Jonathan Aguero Valverde > > Research Assistant and Ph.D. Candidate > > Pennsylvania State University > > The Pennsylvania Transportation Institute > > 201 Transportation Research Building > > University Park, PA 16802 > > www.personal.psu.edu/jua130
Hi Jonathan, Not sure about whether I can help you, however we need a concrete test case to able to determine whether this is a bug or not. Basically an SQL file containing a couple of tables containing some sample geometries along with the join you are using would be a great help. Kind regards, Mark. -- ILande - Open Source Consultancy http://www.ilande.co.uk _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
