Re: MI Order of creating objects from MIF

[Bob Young - www.bydesignwales.demon.co.uk]

Dear Russ


I think your problem is not the order they are imported but the order
they are drawn.

The order they are drawn is governed by the spatial index within
MapInfo. Therefore even if they did draw in the order you want today,
they may well not next week after further objects have been added to the
MAP file thus changing the spatial index. Objects are basically held in
rectangular blocks but there is a limit to the number per block. When
the block is full a new block is created and the existing items are
shared between the ( now ) two blocks leaving some " redundancy " for
new items. But the draw order is now different as all the objects in
block A will be drawn together then all the items in the other block
will be drawn together.

You could have two items virtually adjacent but because the spatial
index divides between them the one object could be the first drawn in
the layer and the neighbouring one drawn last!

If you want to get certain objects on top of others with MapInfo then
you need to use the layers. eg If you want text on top of rectangles put
all text objects in a seperate layer which is higher in your layer
control. There is no "bring to front" or "send to back" in a map window
( only in the layout ).

Hope this helps.


Regards


Bob
www.mapsbydesign.co.uk





In message <00f301bfbabd$4afc57a0$0301a8c0@itec>, Russell Mincher
<[EMAIL PROTECTED]> writes
>The problem is not likely to be with the import, as far as I can tell MI
>creates the objects in the order they are read off the MIF.   Your issue is
>likely to be the order MI draws them.   This has been discussed on the list
>before and understanding the drawing order seems to require expertise in
>some dark and arcane science.
>
>I have found the only reliable way to put one thing on top of another is to
>have them in separate tables.
>
>Regards
>
>
>
>Russ
>
>----- Original Message -----
>From: Bradley Browne <[EMAIL PROTECTED]>
>To: MapInfo mailing list <[EMAIL PROTECTED]>
>Sent: Wednesday, May 10, 2000 7:06 PM
>Subject: MI Order of creating objects from MIF
>
>
>>
>> I am importing a table from mif into MapInfo Pro 5.5 and I am
>> noticing that I cannot seem to get it to import the objects in
>> the order I want it to.  I have one mif export file with many
>> types of objects in it and I want to import it into MapInfo Pro.
>> The mif file has been created by a custom MicroStation dgn
>> converter that we have.  When I import the mif, the order that
>> the objects are created is not the same as the order that they
>> appear in the mif file and so I am getting regions blocking out
>> point objects etc.
>>
>> Is there a rule that MapInfo Pro follows when it is importing
>> objects from mif format, so that I can understand how I can get
>> MapInfo Pro to create the objects in a desired order to get the
>> table looking the way I want it ?
>>
>> Cheers,
>>
>> Brad
>>
>> --
>> Bradley Browne
>> Support Manager
>> Desktop Mapping Systems Pty Ltd
>>
>> 1st Floor 646 Newcastle St
>> Leederville, WA 6007
>> Ph: +61 8 9328 2715 Fax: +61 8 9328 2716
>> email: [EMAIL PROTECTED]
>> http://www.mapsys.com.au/
>>
>>
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-- 
Bob Young - www.bydesignwales.demon.co.uk
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