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Quotes
制图之体有六焉。一曰分率，所以辨广轮之度也。二曰准望，所以正彼此之体也。三曰道里，所以定所由之数也。四曰高下，五曰方邪，六曰迂直，此三者各因地而制宜，所以校夷险之异也。
——裴秀《禹贡地域图序》
昔兰尼的埃拉托色尼运用数学理论和几何方法，根据太阳运行轨迹、春分晷针投射的阴影和天体的倾角，发现地球的周长是二十五万二千斯塔迪亚，也就是三千一百五十万步。
——维特鲁威《论建筑》
ICON_TECH_GEOMATICS_HD
Traits
Era
Medieval Era
Science Cost
500 [ICON_SCIENCE] Science
Eureka
Build a Nilometer.
Unlocks
ICON_DISTRICT_CANAL
Canal
ICON_POLICY_HD_LEVEL
Level
ICON_POLICY_HD_WATERSIDE_PAVILIONS
Waterside Pavilions
ICON_POLICY_HD_WATER_CONSERVANCY_PROJECT
Water Conservancy Project
ICON_POLICY_HD_CHANNEL_ADMINISTRATOR
Channel Administrator
Tech Tree
Prerequires
ICON_TECH_CELESTIAL_NAVIGATION
Celestial Navigation
ICON_TECH_MATHEMATICS
Mathematics
Leads To
ICON_TECH_COMPASS_HD
Compass
Language