Записки программиста, обо всем и ни о чем. Но, наверное, больше профессионального.

2012-11-01

Yak shaving

Как там было в сказке, про цепочку действий, которые необходимо было выполнить для получения молока от коровки?

And the next thing you know, you're at the zoo, shaving a yak, all so you can wax your car.


обзор инструментов, упрощающих загрузку векторных картографических данных проекта OpenStreetMap в СУБД PostgreSQL

how to get data out of OpenStreetMap and into a database, and realized that it’s possible no one’s really explained a full range of current options in the past few years. Like a lot of things with OSM, information about this topic is plentiful but rarely collected in one place, and often consists of half-tested theories, rumors, and trace amounts of accurate fact based on personal experience earned in a hurry while at the point of loaded yak.
At first glance, OSM data and Postgres (specifically PostGIS) seem like a natural, easy fit for one another: OSM is vector data, PostGIS stores vector data. OSM has usernames and dates-modified, PostGIS has columns for storing those things in tables. OSM is a worldwide dataset, PostGIS has fast spatial indexes to get to the part you want. When you get to OSM’s free-form tags, though, the row/column model of Postgres stops making sense and you start to reach for linking tables or advanced features like hstore.
Use Osmosis if you’re interested in data. Start with Osm2pgsql if you want to render maps. Move to Imposm once you know exactly what you want.


Как справедливо замечено, есть много информации на тему загрузки данных из OSM в PostGIS, но вся она неравномерно размазана по интернетам. А тут хорошая попытка достичь кумулятивного эффекта. Одобрямс.

original post http://vasnake.blogspot.com/2012/11/yak-shaving.html

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