[mapguide-users] RE: Is GDAL working and Stable in 2.2?

[Mike Micallef]

Thanks Trevor,

That was very clear - 

I appreciate the time you have spent on this already - as well as all
the other developers' contributions.

It has been a bit of an uphill battle getting an Open Source footprint
in the Ministry - these efforts help a great deal in utilizing the tool.

 

Thanks again,

Mike

 

 

Michael Micallef, PMP

Regional GIS Coordinator

Ministry of Transportation

659 Exeter Rd, London, ON, N6E 1L3

519-873-4416

michael.micallef at ontario.ca <mailto:michael.micallef at ontario.ca> 

 

________________________________

From: Trevor Wekel [via OSGeo.org]
[mailto:ml-node+6700916-703622224-252211 at n2.nabble.com] 
Sent: August 18, 2011 5:18 PM
To: Micallef, Michael (MTO)
Subject: RE: Is GDAL working and Stable in 2.2?

 

Hi Mike, 

I have successfully performed lightweight load testing on the 64 bit
Windows build with some ECW, MrSID, and TIFF data using the information
contained at http://trac.osgeo.org/mapguide/wiki/MGOS22GdalProvider.  So
yes, for my data set I would say that it is stable. 

There are a few limitations which may impact your implementation: 

Occasionally MapGuide does not correctly return the extents or
coordinate system of the raster data.  This makes authoring more
difficult.  Jackie has a patch to improve this behaviour attached to 
http://trac.osgeo.org/mapguide/ticket/740. 

The FDO GDAL Provider has only been tested with a single connection. 
[FeatureServiceProperties] 
DataConnectionPoolSizeCustom = OSGeo.Gdal:1 

Enabling multiple connections may cause raster to go unstable.  This
means that MapGuide and FDO GDAL will only process one raster data set
concurrently.  If you have a lot of users and a lot different raster
data sets, this could be a significant bottleneck. 

I would like to take another pass at MapGuide & FDO GDAL for the 2.4
release.  There is some interest in adding configurable resampling
(bilinear, cubic, etc) and we really do need to remove the single
connection limitation.  I can make time available to do this work if
funding is available.  This would move MapGuide + FDO GDAL Provider
closer to parity with MapGuide + Autodesk Raster Provider. 

Regards, 
Trevor 


-----Original Message----- 
From: [hidden email] [mailto:[hidden email]] On Behalf Of Mike Micallef 
Sent: August 18, 2011 2:20 PM 
To: [hidden email] 
Subject: [mapguide-users] Is GDAL working and Stable in 2.2? 

Not complaining - just discouraged... 

Is GDAL working and stable in 2.2 - all kinds of different and older
posts 
out there about partial work-arounds, Trevor's investigation, locking it
up, 
this is the problem, that's the problem... 

We use imagery and it has been a struggle migrating through the releases
and 
trying out the fixes - I do not want to move until I am sure how to
handle 
the imagery. 

We have custom code all over the place and to migrate is a bit of an 
undertaking.... 
m 

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