hk1980 0.2.3

A forked project from hk80. This project also convert the coordinates between Hong Kong 1980 Grid System and World Geodetic System 1984 with pyproj, with a more update version of pyproj and providing better performance.

hk1980

A forked project from hk80. This project also convert the coordinates between Hong Kong 1980 Grid System and World Geodetic System 1984 with pyproj, with a more update version of pyproj and providing better performance.

Installation

Use the package manager pip or poetry to install foobar.

pip install hk1980

or

poetry add hk1980

Usage

from hk1980 import LatLon, HK80

hku = LatLon(22.284034, 114.137814).to_hk80()
print(hku.northing, hku.easting) # 836303.204 818195.94
print(hku.x, hku.y) # 818195.94 836303.204

hku = HK80(northing=816128, easting=832243).to_wgs84()
print(hku.latitude, hku.longitude) # 22.42944514 113.98124272
print(hku.x, hku.y) # 113.98124272 22.42944514

Performance

hk1980 is roughly well performant than hk80 than 238 times.

#hk80
import timeit
stmt = "LatLon(22.284034, 114.137814).to_hk80()"
_time_ms = timeit.timeit(stmt=stmt, globals=globals(), number=100)*1000
print(f"time: {_time_ms} ms") # 238.1038 ms

#hk1980
import timeit
stmt = "LatLon(22.284034, 114.137814).to_hk80()"
_time_ms = timeit.timeit(stmt=stmt, globals=globals(), number=100)*1000
print(f"time: {_time_ms} ms") # 1.0652 ms

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

MIT