[geos-devel] Questions about linear referencing

[Sean Gillies]

The GEOSProject function returns a numerical value when passed a line  
string and a point not on the line. If the point is beyond (in some  
sense) the line's starting point, you get 0.0 (normalized). If the  
point is past (in some sense) the line's end point, you get 1.0  
(normalized to the line's length). If the point is otherwise off of  
the line but not past one of its ends in that sense, you get a value  
between 0 and 1.

Is this intended? The behavior seems like it could get rather  
unpredictable for anything other than a perfectly straight line.

--
Sean