SVG barometer gauge with kPa scale
Simple barometer gauge with a kPa scale, based on the design of the
Lee Valley Tools barometer.
import barometerbarometer.write_svg("barometer.svg", p_ref=97.35, p_ind=100.20)
Each needle is optional, so the following code will only draw the indicator needle.
barometer.write_svg("barometer.svg", p_ind=100.20)
There is a live image showing the current and past sea level pressure readings for CYEG at dashboard.madphilosopher.ca.
Tested under Python 2.7.12, 2.7.17, and Python 3.5.2, 3.6.9.
The stylized script font used in the example image is Anaktoria,
which will only render properly if you have Anaktoria installed on your system.
Rendered using Inkscape, it looks like this PNG image.
My python code adapts the javascript derhuerst/svg-partial-circle
by @derhuerst to compute the arc of the pressure scale. Copyright 
2017, Jannis Redmann.
