How to measure latitude and longitude outdoors?

It's not complicated to say, but it's actually very simple to get immediate results. The so-called latitude is actually the complementary angle between the earth's surface and the sun, that is, latitude = 90-the angle between the sun and the ground. So, with a pole, you can simply find the latitude. In a day, when the shadow is shortest, set up a pole to measure the shadow and the length of the pole, and the pole/shadow =Tg (latitude). Note that the latitude here is the corresponding radian, and then it can be calculated with the known tropic of cancer angle, 23.6 degrees, but die-hard believes that the angle should be unknown before calculation, so the equator is used. ), if it happens to be on the equator, then this ratio of pole to shadow is just latitude. On the contrary, if the direct point of the sun is not at the equator, it will be corrected.

As for how to calculate the correction value, if you still want to know, I'll post another explanation to you, so as to minimize the space here and not elaborate. Before I talked about the classics again, I said that we should measure the shortest shadow in a day. When you measure the shortest shadow, you should look at the time. We know that it takes 24 hours for the earth to rotate once a week (we don't want to be so precise, 24 hours is enough), that is, 1440 minutes, and the earth rotates 360 degrees. So it can be calculated that the earth rotates once every four minutes. Using the time difference between the above time and 12 noon, you can find the difference between your longitude and the longitude of the local time zone. For example, the shortest sun shadow you just measured is noon 13, if you measure the eastern time zone of China, that is, the East Eighth District. So the longitude difference between you and East Eighth District is 13- 12= 1 hour 1h*60=60 minutes, 60m/(4 degrees/meter) = 15 degrees, which means that your starting point from East Eighth District is/. So your longitude is120-15 =105 degrees. At this point, we have roughly calculated the latitude and longitude of your position.