[postgis-users] Distance of point on a line

[Derek C. Figg]

Hello all,
 
I sent out a fairly dumb question about a week ago and received many
helpful responses, and wanted to thank everyone for that.  Now I have
another fairly simple (I hope) question that I cannot find an answer to
in the documentation.
 
If I have a non-linear linestring, with many points, I know I can find
the total distance of the line with "length(geom)".  If I specify a
point that lies somewhere directly on the linestring, is there a
function that will determine the length from the beginning point of the
line to the specified point somewhere on that line?  Thanks for the
help.
 
 
Derek Figg
CXT Software,
a Connection Technology Company
www.cxtsoftware.com <http://www.cxtsoftware.com/> 
office (602) 265-0195
fax (602) 263-0942
 
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