I see that....what do they mean by Roach Retreat? And what's "code"?
You probably don't understand metric as its foreign and from another country, which Canada is one of. We are due north from you; but if you start seeing elves turn around, you've gone too far. So basically its a yardstick with a bit more tacked on; then divided up into many hundreds of segments.....and add a zero....which makes ten hundreds. That's metricness in a nutshell right there.