Comments for Ragnvald Larsen, geographer

Comment on Solving the ESRI arcpy dissolve challenge by ragnvald

ragnvald — Thu, 11 Apr 2013 02:39:50 +0000

Thank you very much for your feedback! As always I will be looking forward to the next version of ArgGIS. ESRI products are central to the work I am doing and much of it would not be possible without

I would of course also urge you to use and include relevant open source libraries in your software – both for the benefit of its users, ESRI and the other communities supporting open source software!

Comment on Solving the ESRI arcpy dissolve challenge by Ken

Ken — Wed, 10 Apr 2013 14:54:37 +0000

Thanks for your time and effort looking at the Geoprocessing Dissolve tool in 10.1 SP1. We’ve been working hard on this and other tools to improve their performance.

I’m happy to inform you that for 10.2 we continued to work on the performance of the Dissolve tool to maintain the quality of our output while at the same time dramatically improving the performance of cases such as the ones you used in this post. When running a Dissolve all operation in ArcGIS 10.2 against the data you provided we are seeing the following performance of the Dissolve tool:

(Specs – Win7 64; 2xDual Core 3.14Mhz CPU; 8GB RAM)
Dissolve ALL Time
agder_buffer.shp Under 7 seconds
nordland_buffer.shp Under 6 seconds

If anyone finds a Geoprocessing tool that they feel is not performing as expected against their data, please contact us directly and if possible share it with us so we can do all in our power to make things better.

Thanks,
Ken

Comment on Protected: Statusrapport Chile 4 by Mona

Mona — Mon, 08 Apr 2013 12:25:17 +0000

Comment on Protected: Statusrapport Chile 4 by Gunhild G Singsaas

Gunhild G Singsaas — Sun, 07 Apr 2013 16:46:22 +0000

Comment on Protected: Statusrapport Chile 1 by Tone

Tone — Wed, 27 Mar 2013 23:35:55 +0000

Comment on Solving the ESRI arcpy dissolve challenge by SigTill

SigTill — Thu, 07 Mar 2013 06:22:48 +0000

Looks like there are more people having this issue.

http://lin-ear-th-inking.blogspot.ca/2013/02/jts-union-vs-arcgis-dissolve.html

Comment on Solving the ESRI arcpy dissolve challenge by Martin Davis

Martin Davis — Fri, 08 Feb 2013 17:40:56 +0000

Right, the main thing is that they both blow the doors off Arc!

Still memory-bound, though – but I have some tricks up my sleeve for dealing with that problem…

Comment on Solving the ESRI arcpy dissolve challenge by Sean Gillies

Sean Gillies — Fri, 08 Feb 2013 16:42:46 +0000

I meant that I think 8 seconds is fast considering that my laptop is 4 years old. And on top of the slow memory allocation Fiona reads and formats all attributes to JSON by default (I didn’t read just the geoms).

Comment on Solving the ESRI arcpy dissolve challenge by Martin Davis

Martin Davis — Fri, 08 Feb 2013 16:29:15 +0000

Well, it is a pretty fast machine – 3.4 GHz 8-core (although the process is single-thread only).

On my creaky old 2 GHZ machine I get about 4.5 sec.

The difference may be the performance penalty for C memory allocation in GEOS, as opposed to Java’s highly optimized memory managment.

Comment on Solving the ESRI arcpy dissolve challenge by SigTill

SigTill — Fri, 08 Feb 2013 08:17:44 +0000

I have uploaded an example using multiple (4) processes at once using FME Desktop 2013. For the record this takes 4.1 seconds on my computer on the Nordland dataset and took 4 minutes to create….

Files and workspace can be downloaded here. http://depositfiles.com/files/tcxuedugu