In my project, I want to display the location of the vehicle on android using GPS. So ,I use Google API to convert WGS84 coordinate to Google map coordinate and display the car location in this Google map.
But Google map accuracy is not very high ,which is meter-level. I want to use centimeter-level map data .So i want to use HDmap,which stores centimeter-level map data,to replace Google map.
Because map data is all GPS,the drawing APIs such as canvas are all through pixel coordinates ,which are all integers ,but GPS retains several decimal places. So i want to know how to display the road and lane...using GPS in android,and the map can be zoom ,rotation.