The Dart/Flutter version of ipcjs/coordtransform. It provides a utility class for converting coordinates between Baidu coordinates (BD09), National grid coordinates (Mars coordinates, GCJ02), and WGS84 coordinate system.
ipcjs/coordtransform的Dart/Flutter版。 提供百度坐标(BD09)、国测局坐标(火星坐标,GCJ02)、和WGS84坐标系之间的转换的工具模块。