[mapguide-users] SDF Question

[Jason Birch]

That's good to hear.
 
I believe that the SDF format has real potential as a generic file-based
storage and exchange format.  SHP has been used as a de facto standard
because it is pervasive and "open" (sort-of) but it has many problems
such as field width limitations, multiple files, platform-dependant
spatial indexes, etc.  
 
SDF is superior in these areas, is open, and has full single-user
geodatabase capabilities.
 
While the idea is for everyone to be using a spatial database like
PostGIS, I hope that the open source community embraces the SDF format
as a mechanism to provide high quality file-based data stores.  I also
hope that the FDO abstraction layer is utilized by multiple tools in the
same way that OGR and GeoTools are, reducing the amount of effort that
is expended on developing data access and update mechanisms.
 
Jason
 
________________________________

From: Traian Stanev [mailto:traian.stanev at autodesk.com] 
Sent: Thursday, March 23, 2006 13:19
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] SDF Question


Yes it's open, I meant to say "native", not "proprietary".

________________________________

From: Jason Birch [mailto:Jason.Birch at nanaimo.ca] 
Sent: Thursday, March 23, 2006 4:18 PM
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] SDF Question


Did you say proprietary?  Is the SDF format itself not open?
 
Jason

________________________________

From: Traian Stanev [mailto:traian.stanev at autodesk.com] 
Sent: Thursday, March 23, 2006 13:17
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] SDF Question


SDF is the MapGuide proprietary spatial data format.
If you choose to convert SHP to SDF, both the SHP and DBF will be
combined into the resulting SDF file. In general, the data is the same,
but you can expect better performance with SDF. So far there is no
simple tool that lets you view the data in the same way that Excel
allows you to view DBF files for example. 
 
Traian

________________________________

From: Randy Glen Johnson [mailto:rjohnson at maintenanceconnection.com] 
Sent: Thursday, March 23, 2006 4:06 PM
To: users at mapguide.osgeo.org
Subject: [mapguide-users] SDF Question



I have some questions regarding SDF files...

 

My source data is .SHP files with dbf data files

 

Using Autodesk's MapGuide Studio Preview, I loaded my shape files.  It
appears that sdf files were created from wither the shape files or the
dbf files.  I am not sure which it used since I cant see the data.
Somewhere I found an option to create a sdf file but I am not familiar
with sdf files.  What tool do I use to look at data in a sdf file?
Looking on the web only indicated that sql-ce uses that datatype...  I
don't have sql-ce...  any information and suggestions would be greatly
appreciated.

 

Best Regards,

 

Randy Glen Johnson

Programmer Analyst

Maintenance Connection, Inc.

1-888-567-3434 ext 800

http://www.maintenanceconnection.com
<http://www.maintenanceconnection.com/> 

 

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