[mapguide-users] shp or sdf advantages/disadvanatges

[Traian Stanev]

Right, linking the SDF to an external DBF would kill performance, but luckily it's not needed since all the data ends up in the SDF... 
 

	-----Original Message----- 
	From: Andy Morsell [mailto:amorsell at spatialgis.com] 
	Sent: Thu 5/18/2006 11:09 AM 
	To: users at mapguide.osgeo.org 
	Cc: 
	Subject: RE: [mapguide-users] shp or sdf advantages/disadvanatges
	
	
	I have also found that for larger Shape files, converting to SDF at load time results in much better performance.  For large parcel datasets, I also generalize the data using FME.   Since SDF+ contains all of the attribute information from the source Shape files DBF, you would probably want to just use that for tooltips, etc. rather than linking to the DBF file.  FME from Safe Software also will soon be including SDF+ support in their product.  The current beta version downloadable from their web site supports SDF+
	 
	 

	Andy Morsell, P.E. 
	Spatial Integrators, Inc. 
	http://www.SpatialGIS.com 

	 

  _____  

	From: shailesh [mailto:shailesh at simplexindia.com] 
	Sent: Wednesday, May 17, 2006 11:38 PM
	To: users at mapguide.osgeo.org
	Subject: [mapguide-users] shp or sdf advantages/disadvanatges
	
	
	hi
	I am currently using shp files for data resources and some of the data is above 80 mb 
	I think it makes the map very slow to load
	does converting into sdf or another format help it load faster.
	what are advantages /disadvantages .in terms of laoding speed,attribute table data etc
	
	can i use the convert to sdf option in studio or a there any other specialized toosl for doing it.
	if converted to sdf can i still use the dbf assoicated with shp for tooltips and attribute data
	
	-shailesh
	
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