MapServer and PostGIS GEOMETRY type]

Wed Oct 31 04:01:01 PDT 2007

If you own mapinfo, there is an easy way to use mapbasic to create a
script that will split your table up based upon the entity type. It's a
matter of looping through a select statement that filters on object type
and then save the selection as tablename_entity_type.TAB.

Jan Hartmann schreef:
> I really would advise you to split them up. Being lazy always creates 
> more work in the end, I can tell you. I have lots of personal 
> experience in that field :-)
>
> Jan
>
> Delfos, Jacob wrote:
>> Hi Jukka,
>>
>> When I have the data a bit cleaned up, I'll have a look if I can put
>> something together. Currently I'm still in the process of "sifting
>> through" :)
>>
>> I'm dealing with a lot of MapInfo files with mixed geometries, and I
>> want to see if I can get away with being lazy (meaning I don't split up
>> tables by geometry).
>>
>> Regards,
>>
>> Jacob
>>
>>  
>>
>>> -----Original Message-----
>>> From: Rahkonen Jukka [mailto:Jukka.Rahkonen at mmmtike.fi] Sent: 30 
>>> October 2007 14:52
>>> To: Delfos, Jacob; MAPSERVER-USERS at LISTS.UMN.EDU
>>> Subject: RE: [UMN_MAPSERVER-USERS] MapServer and PostGIS GEOMETRY type
>>>
>>> Hi Jacob,
>>>
>>> Would it be impossible for you to create a couple of such records 
>>> and make a controlled trial to see what really happens?
>>>
>>> -Jukka Rahkonen-
>>>
>>>
>>> -----Original Message-----
>>> From: UMN MapServer Users List on behalf of Delfos, Jacob
>>> Sent: Tue 30.10.2007 0:53
>>> To: MAPSERVER-USERS at LISTS.UMN.EDU
>>> Subject: Re: [UMN_MAPSERVER-USERS] MapServer and PostGIS GEOMETRY type
>>>  
>>> Hi Jan,
>>>
>>> Thanks for your reply. But I still need to find out how MapServer will
>>> deal with the records that contain an unexpected geometry type. I could
>>> have a polygon layer pointing to a table which I expect to contain
>>> polygons. But if the geometry type of the table is GEOMETRY, then it
>>> could contain a line object. What will MapServer do?
>>>
>>> If I do an attribute query on such a table, will it return matching
>>> records even if the geometry object is a line, though the layer is a
>>> polygon layer?
>>>
>>> Regards,
>>>
>>> Jacob
>>>  
>>>
>>>> -----Original Message-----
>>>> From: Jan Hartmann [mailto:j.l.h.hartmann at uva.nl] Sent: 29 October 
>>>> 2007 20:13
>>>> To: Delfos, Jacob
>>>> Cc: MAPSERVER-USERS at LISTS.UMN.EDU
>>>> Subject: Re: [UMN_MAPSERVER-USERS] MapServer and PostGIS 
>>> GEOMETRY type
>>>> Hi Jacob,
>>>>
>>>> The Mapfile Reference Manual, chapter Layer says 
>>>> (http://mapserver.gis.umn.edu/docs/reference/mapfile/layer)
>>>>
>>>> ------------------------------------------------------------
>>>>
>>>> TYPE [point|line|polygon|circle|annotation|raster|query|chart]
>>>>
>>>>      Specifies how the data should be drawn. Need not be the same 
>>>> as the shapefile type. For example, a polygon shapefile may be 
>>>> drawn as a point layer, but a point shapefile may not be drawn as a 
>>>> polygon layer.Common sense rules.
>>>>
>>>> ------------------------------------------------------------
>>>>
>>>> You probably just have to try it out on your data.
>>>>
>>>> Jan
>>>>
>>>> Delfos, Jacob wrote:
>>>>> Hi List,
>>>>>
>>>>> For a particular client I have to translate a lot of 
>>>> MapInfo files into
>>>>> PostGIS. Some files may contain some different geometries, 
>>>> which ogr2ogr
>>>>> doesn't like. So I force the geometry type to "GEOMETRY" (-nlt 
>>>>> GEOMETRY). It translates fine, and seems to draw fine in 
>>>> MapServer. But
>>>>> how does MapServer really deal with it?
>>>>>
>>>>> If I have a polygon layer, and point it to a PostGIS table 
>>>> that contains
>>>>> objects of the type "GEOMETRY", does it simply ignore 
>>>> anything that is
>>>>> not a polygon? What about the results of attribute queries? 
>>>> Would those
>>>>> be filtered on the geometry type of the layer?
>>>>>
>>>>> I can avoid using "GEOMETRY type" by translating the files 
>>>> in FME, but
>>>>> I'd prefer to recommend an Open Source solution.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Jacob
>>>>>
>>>>>
>>>>> *JACOB DELFOS
>>>>> GIS ANALYST
>>>>> *Maunsell Australia Pty Ltd
>>>>> 629 Newcastle Street, Leederville, WA 6007
>>>>> PO Box 81, Leederville, WA 6902
>>>>> Western Australia
>>>>> ABN 20 093 846 925
>>>>>
>>>>> Tel     + 61 8 9281 6185
>>>>> Fax    + 61 8 9281 6297
>>>>> _jacob.delfos at maunsell.com_
>>>>>
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>

-- 

Milo van der Linden
skype: milovanderlinden <skype:milovanderlinden?add>
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