[MS4W-Users] MS4W Beta 7 -- Python-Mapscript -- queryByRect strange behavior

[Christian Jauvin]

Hi Jeff,

I tried the MS 5.6 beta 5 patch for MS4W and it solves the problem (if
there was one!). I guess my diagnostic test case was not relevant on
the other hand, because although my framework now behaves correctly,
the behavior I observed and reported in the previous message (with the
test Python script) is again the same (distinct features that share
the same pointer). I don't know what it means, but it now works.

Thanks for the suggestion, I can now resume working on my framework.

Christian


On Mon, Nov 9, 2009 at 7:34 AM, Jeff McKenna
<jmckenna at gatewaygeomatics.com> wrote:
> Christian Jauvin wrote:
>> Hi,
>>
>> Following the problem description I posted last week, I have created a
>> very simple test case: the attached Python script creates first a map
>> by reading the attached mapfile, and then add five distinct point
>> features to its only layer. It then performs a queryByRect that
>> encompasses the whole layer (certain to retrieve the five features)
>> and prints the results. On a Linux box running Python-MS 5.0, the
>> results are:
>>
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x8cf600> >
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x8d28a0> >
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x8d2a30> >
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x8d2c00> >
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x8d2dd0> >
>>
>> Five distinct objects, which is what is expected, whereas the same
>> script running on Windows with the latest version of MS4W (3b7, thus
>> running Python-MS 5.4), I get:
>>
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x00B6DB40> >
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x00B6DAE0> >
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x00B6DB40> >
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x00B6DAE0> >
>> <mapscript.shapeObj; proxy of <Swig Object of type 'shapeObj *' at 0x00B6DB40> >
>>
>> The problem I was describing is apparent here: the five features seem
>> to be sharing in fact only two different objects (based on their
>> pointer values).
>>
>> I am not familiar enough with the bowels of MapServer to be able to
>> debug this problem by myself, so again, any help would be greatly
>> appreciated.
>>
>
> Hello Christian,
>
> You might also test with MapServer 5.6 beta5, which you can also find on
> the MS4W downloads page, as an add-on package.
>
> Also, you could try another MapServer package on Windows (such as
> http://fwtools.maptools.org/).
>
> If you only see your issue when using MS4W, then you can file a ticket
> in MS4W's tracker
> (http://bugzilla.maptools.org/query.cgi?GoAheadAndLogIn=1).
>
> Thanks.
>
> -jeff
>
>
>
>
> --
> Jeff McKenna
> FOSS4G Consulting and Training Services
> http://www.gatewaygeomatics.com/
>
>
>
>
>
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