[OGR] Make OGR Connections honour SHAPEPATH

[dmorissette]

"Lars V. Nielsen" wrote:
> 
> When you're looking into it, you might wanna check why OGR connection paths 
(e.g. MapInfo
tabs) aren't relative to SHAPEPATH but to
> the MAP file itself.
> 

This is the way things have been implemented.  Whether this is a good or
a bad thing could be argued I guess.  For sure we won't change this
behavior in version 3.6, but I'll CC the mapserver-dev list to find out
what others would think about changing the behavior in 3.7 so that OGR
CONNECTIONS try to honour the SHAPEPATH when it's set.

[dmorissette]

Steve Lime wrote:
> 
> That would make it consistent with raster and shapefile layers. I
> modified 3.7 so that for
> shapefiles the following rules apply
> 
>   1) check for absolute path first
>   2) check releative to shapepath next
>   3) finally check relative to mappath (mapfile location)
> 
> Pretty easy mod given the functions you guys have already written.
> 
> Steve
> 

[dmorissette]

I've made this change in MapServer 4.1 (CVS).  OGR now does the same as
shapefiles with relative paths: try to open the files relative to shapepath, and
if not found then try relative to mapfile path.