How did the ancients draw maps a thousand years ago?

|: hello.

the ancients drew maps with rules (drawing circles), moments (rulers) and compasses, and crossed mountains and rivers to form maps one by one.

The information about the compass is summarized as follows.

The compass, also known as the compass, is a necessary instrument for the operation of geomantic omen. It has gone through a long historical process from its invention to its gradual perfection. According to Wang Daoheng's preface to "A thorough explanation of the compass", "The system of the compass in Guangdong Province was founded by Emperor Xuandi, and the Duke of Zhou followed its laws, and the compass orientation was determined. However, there are only twelve gods in nature, and Han Zhang is assigned to eight dry four dimensions, including Luo, which is called the site. Yang and Lai added two layers, Chinese and foreign, and the name was Tianpan, which combined three talents. " It can be seen that as early as the Tang and Song Dynasties, the three large needles (straight needle, middle needle and sewing needle) of the compass were basically established. After the Northern Song Dynasty, with the improvement of the theory of geomantic omen, geomantic omen became popular in China. At this time, some feudal scholar-officials also joined in, and wrote books in succession, and then added compass layers in an unconventional way. By the end of the Qing Dynasty, a geomantic compass with more than 4 floors was formed, which was all-encompassing. Through the latitude and longitude, it was possible to distinguish the good and bad directions of mountains and rivers, determine the fortunes of the world, and make full use of everything.

in the Qin dynasty, our ancestors built "Qin canal", "Lingqu canal" and "Jiangnan canal", all of which depended on rules, rules and compasses, and our ancestors waded through mountains and rivers.