Rendering Icelandic topography.

Initially, I wanted to try my hand at creating a topographic map of Ontario. But I quickly realized how flat this great province is.

Undiscouraged, my mind went to mapping Iceland, which I visited in 2015. They had hills there.

The NOAA (National Oceanic and Atmospheric Administration) has made available a topographic dataset, called the SRTM30_PLUS. I used this to obtain elevation data for Iceland, as a .csv file:

After this came treating the data with numpy and Scipy and getting it ready for a scatter plot.

My initial attempts didn't er - look so good:

The solution was one line of code. A recently added class in Matplotlib.colors called "TwoSlopeNorm".

This allowed me to normalize the elevation data and set a center.

My code, with that particular line highlighted:

And here, the final image, with axes as coordinates: