[maplab-users] Query question

William A. Bronsema, C.E.T.
Fri, 17 Oct 2003 07:36:25 -0400
Hi Richard,

I'm not sure if this will help or not, but FYI -

There is a constant defined in the globprefs.php file for your 
gmapFactory application that should look something like this (
In my version it is on line 65):

define( "MIN_RECT", 5 );

This constant controls the difference between a "point click" and 
"rectangle select".  Essentially all interactions with the map are 
"rectangle selects".  This constant tells the application the threshold 
at which the user was intending to perform a "point click" (i.e. a tiny 
rectangle) instead of a "rectangle select".

In the case of querying, if the value is too small then more often than 
not a tiny rectangle query will be performed instead of a point query 
which can lead to confusing results.




William A. Bronsema, C.E.T.
Applications Developer

DM Solutions Group Inc.

Post,Richard [NCR] wrote:
> Hello,
> I have a small problem with my gmapfactory application.  The application 
> uses the query function to select points from a shape file.  The problem 
> is that the query only works when you drag a box over the points (ie. 
> Doing a rectangular query).  When you simply click on the point nothing 
> is selected (ie. The layer does not return any results).  I have already 
> tried changing the TOLERANCE and TOLERANCEUNITS in the map file, which 
> does not seem to have any effect. 
> Any suggestions would be welcome.
> Thanks,
> Richard Post
> Environment Canada

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