Patent ID: 11887254
Assignee: CHONGQING SURVEY INSTITUTE
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 1:
2. The method for correcting space coordinates of a three-dimensional model according to claim 1, wherein step S2 further comprises the following steps to calculate the parameters of correction between the original coordinate frame in the first format and the target coordinate frame and construct the space coordinate correction matrix:
step S21, obtaining the space coordinates of the four or more control points in the regions of the three-dimensional model in the original coordinate frame in the first format and the space coordinates of the control points in the target coordinate frame in the second format, and establishing a mathematical model for correction between the original coordinate frame and the target coordinate frame;
step S22, inputting the obtained space coordinates of the control points in the original coordinate frame and in the target coordinate frame into the mathematical model for correction to calculate the parameters of correction; and
step S23, constructing the space coordinate correction matrix with the parameters of correction calculated in step S22.