Disqus - Latest Comments for sabman

Re: Beginner's Guide to Quantitative Trading

Shoaib Burq — Sat, 08 Apr 2017 06:37:31 -0000

Very good article! thanks for writing it!

Re: postgis template database

Shoaib Burq — Wed, 24 Nov 2010 16:35:00 -0000

Jean, we have just loaded a large amount of data into the template_postgis database. To make sure that the query planner has up-to-date stats its generally good practice to run Vacuum after making a large change to a database. Secondly we are also locking the database to prevent any further changes. So its a good idea to do it at this stage.

Re: What is a SDSS and how is it different from a GIS?

Shoaib Burq — Mon, 13 Jul 2009 08:29:40 -0000

Alexander, the main tool for manipulating Geographic data in the open source world is GDAL (http://gdal.org/). Now depending on what you are trying to do the optimization would vary. For example if you are looking at spectral imagery you can have a number of configurations for storing the pixels (like BIL, BIP, BSQ http://tinyurl.com/ndr9mj). If you tell me what you are doing I might be able to help more.
Shoaib

Re: Documenting Drought (Beyond Reasonable Drought)

Shoaib Burq — Mon, 16 Mar 2009 00:47:06 -0000

Thanks for the comment Julie - the photographs very were impressive. Do get in touch if you happen to be in Canberra.

Re: What is a SDSS and how is it different from a GIS?

Shoaib Burq — Tue, 10 Mar 2009 05:25:51 -0000

@avi that's a good question.

The word "model" can be used in a number of contexts.

I have used it in the context of application or domain models.

Geodata models are different to domain specific models. Geodata models can be generic, the Shapefile vector data model would be one example. Shapefiles are not limited to a particular application.

Having said that For example sometimes we can get geodata that have been optimized for particular applications. Such geodata models would be regarded as domain specific.

Furthermore we find geodata models that are proprietary. These are often designed to lock people into particular vendors software or gain some other competitive advantage.