pygcj

A GCJ02 and WGS-84 coordinate converter.

Increase the accuracy by control points

Generate Control Points

Default gcp file’s grid interval is 1 degree. If you want generate new gcp file,please run:

python generate_gcp.py

Transform between WGS84 and GCJ02

from pygcj.pygcj import GCJProj
trans = GCJProj()
# wgs84 to gcj
gcj_lat, gcj_lon = trans.wgs_to_gcj(45.2,112.8)

# gcj to wgs84
wgs_lat, wgs_lon = trans.gcj_to_wgs(45.2,112.8)

# gcj to wgs84 and specific threshold(default is 0.000001)
wgs_lat, wgs_lon = trans.gcj_to_wgs(45.2,112.8,0.00000001)

accuracy test (use default control points)

origional:
distance mean: 347.554477357
distance stdev: 164.494315519

eviltransform:
distance mean: 3.39331251552
distance stdev: 2.6602095071

pygcj.gcj_to_wgs():
distance mean: 0.395794995772
distance stdev: 0.571923075943