tileindex: sequence of attributes in individual shapefiles matter s

[Stephen Woodbridge]

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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> 
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