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
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