tileindex: sequence of attributes in individual shapefiles matter s

[Bart van den Eijnden (OSGIS)]

Good suggestion, done:

http://bugzilla.remotesensing.org/show_bug.cgi?id=1144

Best regards,
Bart

Stephen Woodbridge wrote:

> Bart,
>
> Can I suggest you write a bug against ogrtindex as this is a 
> requirement for mapserver to function and it save a lot of headaches 
> to catch it early on.
>
> -Steve W.
>
> Bart van den Eijnden (OSGIS) wrote:
>
>> Hi Steve,
>>
>> okay, good to know tile4ms checks for this sort of thing, ogrtindex 
>> doesn't throw errors ...
>>
>> Best regards,
>> Bart
>>
>> Stephen Woodbridge wrote:
>>
>>> Hi Bart,
>>>
>>> It does fetch by name from the first file that is opened but then 
>>> remembers the indexes. If you use tile4ms, this now checks for these 
>>> kinds of errors and trows and error. Mapserver can open 10 of 
>>> thousands of files when drawing a layer and this would add a lot of 
>>> additional overhead to fetch the column numbers based on names for 
>>> every file.
>>>
>>> I know it is a pain, but your should fix the data. It would not be 
>>> hard to write a little perl script to read the dbf file and reorder 
>>> the attributes.
>>>
>>> -Steve W
>>>
>>> Eijnden, B. van den (Bart) wrote:
>>>
>>>> Hi list,
>>>>
>>>> today we encountered that the sequence of attributes of the individual
>>>> shapefiles which were used in a tile-index are important. In 3 out 
>>>> of 4
>>>> shapefiles the CLASSITEM column was the 3rd column, but in the 4th 
>>>> shapefile
>>>> it was the 4th column, so that one did not show up in the map ....
>>>>
>>>> Apparently Mapserver fetches attribute values based on a column 
>>>> index? Would
>>>> it be better to fetch by name? Otherwise I think this requirement 
>>>> should be
>>>> documented somewhere.
>>>>
>>>> Best regards,
>>>> Bart
>>>>
>>>>
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>
>


-- 
Bart van den Eijnden
OSGIS, Open Source GIS
http://www.osgis.nl