Category Archives: Uncategorized

QGIS TimeManager part 1

I found an open source project I would like to contribute. It is called Time Manager and it enables the QGIS software to show an animation of the progression of geospatial data in time. It is tremendously useful to provide … Continue reading

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Avro and other data serialization formats

Today I wrote an avro schema and handled avro data in both python and java — seems sane enough, unlike protobuffer and its weird c++-to-java bugs. Here is a collection of interesting links. http://martin.kleppmann.com/2012/12/05/schema-evolution-in-avro-protocol-buffers-thrift.html Avro spec Avro parsing with python … Continue reading

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Daily log

Today I continued my rtsp scraping project. I wrote a function to query the scraped data so far within a time-range and location. I toyed with the idea of introducing parallel modules in python but then I decided to just  … Continue reading

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Postgis convex hull

Quantum Gis has been  pissing me off for the last week with its slow rendering time.  I probably should switch to something leaner. For the time being I will just export what I want as an image, for instance the … Continue reading

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Learning moar sql and regexp

Today I woke up at 5:30 and wisely chose not to go back to sleep because then the whole day would go to the dogs. Anyway, it’s 10 now and I have already achieved some things. I parsed the source … Continue reading

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First steps with pgrouting

I installed pgrouting today (not especially painful) and loaded some data both from osm2pgsl and osm2pgrouting. The tables generated from both are not 100% compatible. The worst thing is that the points in the planet_osm_point table are not usable as … Continue reading

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