我需要将十进制纬度/经度值转换为带符号的24位值。 对于纬度示例，将37.256526值转换为带符号的24位。 规范很好。
The latitude is coded with 24 bits: 1 bit of sign and a number between 0 and 2^23-1 coded in binary on 23 bits. The relation between the coded number N and the range of (absolute) latitudes X it encodes is the following (X in degrees):