The invention relates to a geographic coordinate in large scale map application and measurement method and a map for implementing the same method. The method of reading the geometric coordinates of the large-scale map comprises the following steps: capturing a vertical distance from the target point to the left longitude or the lower parallel, and reading the geographical coordinates directly on the map edge line near the target point. The large-scale map for implementing the method employs the geometric coordinate network. The indexing zone difference of the adjacent latitude and longitude lines is one point. Each indexing zone is marked with the degree value. Each indexing zone is scaled by second values on the outer edge line. The method process is simplified and the efficiency is high. The line searching error, the line connection error and the reading error of the map user are reduced. The number reading and the formulation calculation are not required, the speed is increased, and the error is reduced. The dependence on the measurement tools such as long rulers and calculators of the personnel is reduced. The map loss is reduced, the manpower and material resources are saved, and wastes of map printing resources are reduced.