Little Geo Stories: Square Miles

How I sensed a bug while not seeing any, and what came of it.

Dear reader,

Today I found a place on our website where we display the size of a recreational area in square kilometers.

199 km²

I cannot fully explain what happened next, but I had a hunch something must be wrong with this feature.

Narrator: there was.

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Little Geo Stories: A Tale Of 180th Meridian

A little story about a very common mistake when working with Earth coordinates around 180th meridiane.

Several days ago, I got a bug request: no airports around a certain hotel were being displayed.

There certainly were some airports relatively close to the hotel, and judging by all conditions they should have been there. This hotel’s page could boast with very good air connections, but it did not.

Like a proper seasoned Geo-expert should do in this case, first thing I did – was checking the location of the hotel.

Of course, it was located on Fiji.

The problem immediately became absolutely clear to me.

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How we checked road graph correctness

How to make the roads better?
What about roads on a map?
Read to learn what graph (and non-graph) algorithms we implemented to make the roads good.

One particularly nasty and cold day, in the middle of February, our users, cartographers, came to visit us, developers. And they looked worried.

We offered them hot tea and chocolate candy. By gentle nudging and careful questioning we managed to understand what was bothering them.

They wanted the roads to be good.

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