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#!/usr/bin/env python
#
# Test gps/misc.py
#
# This code runs compatibly under Python 2 and 3.x for x >= 2.
# Preserve this property!
from __future__ import absolute_import, print_function, division
import sys, gps.misc
errors = 0
# values from here: https://en.wikipedia.org/wiki/Decimal_degrees#Precision
# Note the wikipedia numbers are NOT ellipsoid corrected:
# EarthDistanceSmall() is ellipsoid corrected.
#
# I suspect these numbers are not quite right
# someone will promptly correct me?
tests = [
# equator 1 degree
( 0.00000000, 0.00000000, 1.00000000, 0.00000000, 110574),
( 0.00000000, 0.00000000, 0.00000000, 1.00000000, 110574),
( 0.00000000, 0.00000000, 1.00000010, 1.00000000, 156372),
# 23N 1 degree
( 23.00000000, 0.00000000, 24.00000000, 0.00000000, 110751),
( 23.00000000, 0.00000000, 23.00000000, 1.00000000, 101940),
( 23.00000000, 0.00000000, 24.00000000, 1.00000000, 150270),
# 45N 1 degree
( 45.00000000, 0.00000000, 46.00000000, 0.00000000, 111141),
( 45.00000000, 0.00000000, 45.00000000, 1.00000000, 78582),
( 45.00000000, 0.00000000, 46.00000000, 1.00000000, 135723),
# 67N 1 degree
( 67.00000000, 0.00000000, 68.00000000, 0.00000000, 111528),
( 67.00000000, 0.00000000, 67.00000000, 1.00000000, 43575),
( 67.00000000, 0.00000000, 68.00000000, 1.00000000, 119416),
# equator 10e-7
( 0.00000000, 0.00000000, 0.00000010, 0.00000000, 0.011057),
( 0.00000000, 0.00000000, 0.00000000, 0.00000010, 0.011057),
( 0.00000000, 0.00000000, 0.00000010, 0.00000010, 0.015638),
# 23N 10e-7
( 23.00000000, 0.00000000, 23.00000010, 0.00000000, 0.011074),
( 23.00000000, 0.00000000, 23.00000000, 0.00000010, 0.010194),
( 23.00000000, 0.00000000, 23.00000010, 0.00000010, 0.015052),
# 45N 10e-7
( 45.00000000, 0.00000000, 45.00000010, 0.00000000, 0.011113),
( 45.00000000, 0.00000000, 45.00000000, 0.00000010, 0.007858),
( 45.00000000, 0.00000000, 45.00000010, 0.00000010, 0.013611),
# 67N 10e-7
( 67.00000000, 0.00000000, 67.00000010, 0.00000000, 0.011152),
( 67.00000000, 0.00000000, 67.00000000, 0.00000010, 0.0043575),
( 67.00000000, 0.00000000, 67.00000010, 0.00000010, 0.011973),
]
# EarthDistanceSmall
for ( lat1, lon1, lat2, lon2, dist) in tests :
distance = gps.misc.EarthDistanceSmall( (lat1, lon1), (lat2, lon2))
# compare to 0.01%
diff = dist - distance
max_diff = dist * 0.0001
if abs( diff ) > max_diff:
sys.stderr.write( \
"misc test: %.8f %.8f, %.8f %.8f, expected %.7f got %.7f\n" \
% (lat1, lon1, lat2, lon2, dist, distance))
errors += 1
else:
print("OK" )
if errors:
sys.exit(1)
else:
sys.exit(0)
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