This is a Racket GUI Widget which can display maps based on Open Street Map tiles — it allows embedding maps in Racket GUI applications. I originally wrote this code as part of the ActivityLog2 project and, since I wanted to use it in other projects, I decided to move it onto a separate package and publish it to the Racket package server.
A Garmin fitness device can use workouts during a bike or run activity: they are a collection of steps with a duration and intensity (such as heart rate, pace or power). While running or biking, the device keeps track of the duration and will sound an alarm if the intensity is too high or too low. Workouts can be created on the Garmin Connect website, but I decided to write my own application for creating workouts.
I announced my original plot overlay implementation on the Racket Users mailing list and the Racket developers were enthusiastic about these improvements and they suggested that I contribute them to the main plot package. They also suggested a different approach for implementing this feature, which results in more flexibility for implementing overlays.
After using the inclinometer for a while, it became apparent that the functionality was too basic. I extended it, so the unit tracks maximum pitch and roll values seen, displays the pitch and roll direction and can perform calibration on demand, so the unit does not have to acquire its orientation each time it is started up. I also built a better enclosure for it.
The Racket plot package produces interactive
snip% objects which allow zooming of the plot area. While this is a cool and sometimes useful feature, the functionality is hard coded in the
plot-snip% class inside the package. I extended the package to allow the user to customize the interactive features of the plot, to display additional information when the user hovers the mouse over the plot.
I paid $600 for my Garmin FR920 GPS watch, and since I got it, I bought six pairs of running shoes totaling $1124 and went to the swimming pool 153 times: at approximately $5 for a swim session, this is $765 spend on swimming. While the FR920 cost more than a single pair of running shoes or a single swimming session, it actually comes out as cheaper to own than the previous two.
It is no surprise to anyone who tried to run in the heat that it is harder than when the outdoor temperature is more pleasant. But how much harder is it, and how can this be quantified? With summer in full swing in the southern hemisphere, I decided to take a look at how running is affected by temperature.