Difficulty level 3 of 5: Intermediate
This blog post is made as a “note-to-self” so that I can remember the procedure. You are of course welcome to read along. It’s does nothing fancy, simply imports the planet.osm file into PostGIS using Osmosis with the Snapshot Schema.…
I’m learning about matplotlib, and actually just bought the book Matplotlib for Python Developers. Geographical plots Browsing stackoverflow, the matplotlib homepage, and other resources, I eventually came by this stackoverflow post, which mentions BaseMap. Since the data that I’m plotting…
I like to install 3rd party Python libraries using pip. Pip and easy_install can automatically download and install Python code from PyPi (also known as The Cheese Shop). This is how to publish your own Python code on PyPi, so…
Here is an example of calling __init__() for all base classes, when doing multiple inheritance in Python (mixins). It uses *args and **kwargs syntax:
This table lists the number of total tiles for increasing zoom-level in a tile cache. The tile cache is assumed to be pyramidal: . level 1: 1 tile level 2: 5 tiles level 3: 21 tiles level 4: 85 tiles…
Plotting data in LaTeX is a useful thing to do. Xavier Delaunay shows how to do it on his homepage: The plot looks like this:
I’m just getting into this topic, but it seems that Python Eggs are the way to go. Here’s a good tutorial: In the long term, I’d like to be able to do: pip install
Apache Cassandra is a column-store with a p2p distribution architecture. Yesterday I did a presentation about Cassandra at Grontmij, Glostrup, Denmark. I made the slides in Google Docs, and they’re public: slides.
How complicated does a mathematical function, pseudorandom(x), have to be to create something that seems random, and how do you check whether it seems random? Looking at a long list of numbers is not a good way, because our ability…
Mostly so I myself can remember how to do it, here is how to create a random geotiff with GDAL in Python Note: the width and height are given in opposite order in the GDAL raster and numpy arrays! import…