Patent ID: 11953614
Assignee: GETAC TECHNOLOGY CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 10:
11. The method of claim 9, wherein the positioning information comprises a first longitude and a first latitude, whereas the coordinate difference information comprises a longitude difference and a latitude difference, and the step of calculating the coordinate difference information with the distance data and the azimuth angle comprises calculating the coordinate difference information with equations below,

Am=π(0−Ar)/180;

Di=R×cos(Am);

Δlng=Di×sin(Az)/Ce×cos(red(Lat-o)); and

Δlat=Di×cos(Az)/Ce; 

where π is the ratio of the circumference of a circle to its diameter, Ar denotes the tilt angle, R denotes the distance data, Az denotes the azimuth angle, Ce denotes the length of an arc of 1 degree on the Earth's surface, Lat-o denotes the first latitude, Along denotes the longitude difference, and Δlat denotes the latitude difference.