def mga2020_to_mga94(zone, east, north, ell_ht=False, vcv=None):
"""
Performs conformal transformation of Map Grid of Australia 2020 to Map Grid of Australia 1994 Coordinates
using the reverse form of the GDA2020 Tech Manual v1.2 7 parameter similarity transformation parameters
:param zone: Zone Number - 1 to 60
:param east: Easting (m, within 3330km of Central Meridian)
:param north: Northing (m, 0 to 10,000,000m)
:param ell_ht: Ellipsoid Height (m) (optional)
:param vcv: Optional 3*3 numpy array in local enu units to propagate tf uncertainty
:return: MGA1994 Zone, Easting, Northing, Ellipsoid Height (if none provided, returns 0), and vcv matrix
"""
lat, lon, psf, gridconv = grid2geo(zone, east, north)
if ell_ht is False:
ell_ht_in = 0
else:
ell_ht_in = ell_ht
if vcv is not None:
vcv = vcv_local2cart(vcv, lat, lon)
x94, y94, z94 = llh2xyz(lat, lon, ell_ht_in)
x20, y20, z20, vcv94 = conform7(x94, y94, z94, -gda94_to_gda2020, vcv=vcv)
lat, lon, ell_ht_out = xyz2llh(x20, y20, z20)
if vcv94 is not None:
vcv94 = vcv_cart2local(vcv94, lat, lon)
if ell_ht is False:
ell_ht_out = 0
hemisphere, zone20, east20, north20, psf, gridconv = geo2grid(lat, lon)
return zone20, east20, north20, round(ell_ht_out, 4), vcv94
def test_xyz2llh(self):
abs_path = os.path.abspath(os.path.dirname(__file__))
testdata = read_dnacoord(os.path.join(abs_path, 'resources/natadjust_rvs_example.dat'))
for coord in testdata:
coord.converthptodd()
latcomp, longcomp, ell_htcomp = xyz2llh(coord.x, coord.y, coord.z)
assert (abs(latcomp - coord.lat) < 2e-9)
assert (abs(longcomp - coord.long) < 2e-9)
assert (abs(ell_htcomp - coord.ell_ht) < 1e-4)
def geo(self, ellipsoid=grs80, notation=DECAngle):
"""
Convert coordinates to Geographic
Note: If no N Value, no Orthometric Height set.
:param ellipsoid: geodepy.constants.Ellipsoid Object (default: grs80)
:param notation: Latitude and Longitude Angle Notation format
:type notation: geodepy.angle class or float
:return: Geographic Coordinate
:rtype: CoordGeo
"""
lat, lon, ell_ht = xyz2llh(self.xaxis, self.yaxis, self.zaxis,
ellipsoid)
if notation is DECAngle:
lat = DECAngle(lat)
lon = DECAngle(lon)
elif notation is HPAngle:
lat = DECAngle(lat).hpa()
lon = DECAngle(lon).hpa()
elif notation is GONAngle:
lat = DECAngle(lat).gona()
lon = DECAngle(lon).gona()
elif notation is DMSAngle:
lat = DECAngle(lat).dms()
lon = DECAngle(lon).dms()
elif notation is DDMAngle:
lat = DECAngle(lat).ddm()
lon = DECAngle(lon).ddm()
elif notation is float:
pass # geodepy.convert.grid2geo returns float dec degrees
else:
raise ValueError(
f'CoordCart.geo() notation requires class float or'
f' class from geodepy.angles module. '
f'Supplied: {notation}')
if self.nval is None:
return CoordGeo(lat, lon, ell_ht)
else:
return CoordGeo(lat, lon, ell_ht, ell_ht - self.nval)
if l[20:25].strip() == 'CCC':
apref[str(stn)] = {
'P': P,
'L': L,
'OHGT': H,
'EHGT': h,
'X': X,
'Y': Y,
'Z': Z
}
if str(stn) == first_stn:
for b in xyz_bases:
x = X + float(xyz_bases[b]['dX'])
y = Y + float(xyz_bases[b]['dY'])
z = Z + float(xyz_bases[b]['dZ'])
P, L, h = xyz2llh(x, y, z)
ngca[str(b)] = {
'P': P,
'L': L,
'EHGT': h,
'X': x,
'Y': y,
'Z': z
}
if c < 0: c += 1
###########################################################################
# Analyse vector agreement of NGCA Vs APREF #
###########################################################################
best_sum = 0
prev_best = 1000000000000000000
def gnss_xyz2dah(coords, xyz_bases):
dah_bases = {}
print(' Calculating baseline transformations ')
for b in xyz_bases:
f_x, f_y, f_z = llh2xyz(coords[xyz_bases[b]['first']]['LAT'],
coords[xyz_bases[b]['first']]['LON'],
coords[xyz_bases[b]['first']]['EHGT'])
Calc_point_x = f_x + xyz_bases[b]['dX']
Calc_point_y = f_y + xyz_bases[b]['dY']
Calc_point_z = f_z + xyz_bases[b]['dZ']
p, l, h = xyz2llh(Calc_point_x, Calc_point_y, Calc_point_z)
e_dist, b_az, b_rev_az = vincinv(coords[xyz_bases[b]['first']]['LAT'],
coords[xyz_bases[b]['first']]['LON'],
p, l)
adj_dist, adj_az, b_rev_az = vincinv(
coords[xyz_bases[b]['first']]['LAT'],
coords[xyz_bases[b]['first']]['LON'],
coords[xyz_bases[b]['second']]['LAT'],
coords[xyz_bases[b]['second']]['LON'])
e_dist_res = adj_dist - e_dist
b_az_res = adj_az - b_az
e_ht_diff = h - coords[xyz_bases[b]['first']]['EHGT']
n1 = coords[xyz_bases[b]['first']]['OHGT'] - coords[xyz_bases[b]
['first']]['EHGT']
n2 = coords[xyz_bases[b]['second']]['OHGT'] - coords[
xyz_bases[b]['second']]['EHGT']
o_ht_diff = -1 * n1 + e_ht_diff + n2
o_ht_diff_res = (coords[xyz_bases[b]['second']]['OHGT'] -
coords[xyz_bases[b]['first']]['OHGT']) - o_ht_diff
#transfor the baseline to distance, azimuth, up
#translated code from http://peas13.dli.wa.gov.au/svn-intsvc/Delphi/GesmarComponents/trunk/Geodetic.pas
m_lat = (coords[xyz_bases[b]['first']]['LAT'] + p) / 2
m_x = (f_x + Calc_point_x) / 2
m_y = (f_y + Calc_point_y) / 2
dR = sqrt(m_x * m_x + m_y * m_y)
dE2 = grs80.ecc1sq
dQ = radians(m_lat)
sinQ = sin(dQ)
dTemp = sqrt(1.0 - dE2 * sinQ * sinQ)
dN = grs80.semimaj / dTemp
dM = dN * ((1.0 - dE2) / (dTemp * dTemp))
sinQ = sin(dQ)
cosQ = cos(dQ)
secQ = 1.0 / cosQ
dF = grs80.f
dE2 = 2 * dF - (dF * dF)
dA = m_x * tan(dQ) / (dR * dR * (dE2 - secQ * secQ))
dB = 1.0 / (dR * secQ * secQ - dE2 * dN * cosQ)
dC = dR * sinQ / (cosQ * cosQ) - dN * dE2 * sinQ * cosQ / (
1.0 - dE2 * sinQ * sinQ)
JMatrix = np.zeros([3, 3])
JMatrix[0, 0] = dM * dA
JMatrix[0, 1] = dM * (m_y * dA / m_x)
JMatrix[0, 2] = dM * dB
JMatrix[1, 0] = -(dN * cosQ) * m_y / (dR * dR)
JMatrix[1, 1] = (dN * cosQ) * m_x / (dR * dR)
JMatrix[1, 2] = 0.0
JMatrix[2, 0] = m_x / (dR * cosQ) + dA * dC
JMatrix[2, 1] = m_y / (dR * cosQ) + m_y * dA * dC / m_x
JMatrix[2, 2] = dB * dC
b_var_matrix = np.zeros([3, 3])
b_var_matrix[0, 0] = xyz_bases[b]['sdev_x']**2
b_var_matrix[1, 1] = xyz_bases[b]['sdev_y']**2
b_var_matrix[2, 2] = xyz_bases[b]['sdev_z']**2
b_nst_matrix = np.zeros([3, 3])
b_nst_matrix[0, 0] = xyz_bases[b]['nstat_x']**2
b_nst_matrix[1, 1] = xyz_bases[b]['nstat_y']**2
b_nst_matrix[2, 2] = xyz_bases[b]['nstat_z']**2
cosAz = cos(radians(b_az))
sinAz = sin(radians(b_az))
AMatrix = np.zeros([3, 3])
AMatrix[0, 0] = cosAz
AMatrix[0, 1] = sinAz
if e_dist == 0:
AMatrix[1, 0] = degrees(sinAz / 0.00001)
AMatrix[1, 1] = -degrees(cosAz / 0.00001)
else:
AMatrix[1, 0] = degrees(sinAz / e_dist)
AMatrix[1, 1] = -degrees(cosAz / e_dist)
GMatrix = np.matmul(np.matmul(JMatrix, b_var_matrix),
JMatrix.transpose())
dah_Matrix = np.matmul(np.matmul(AMatrix, GMatrix),
AMatrix.transpose())
n_GMatrix = np.matmul(np.matmul(JMatrix, b_nst_matrix),
JMatrix.transpose())
nstat_Matrix = np.matmul(np.matmul(AMatrix, n_GMatrix),
AMatrix.transpose())
dah_bases[b] = {
'first': xyz_bases[b]['first'],
'second': xyz_bases[b]['second'],
'dX': xyz_bases[b]['dX'],
'dY': xyz_bases[b]['dY'],
'dZ': xyz_bases[b]['dZ'],
'e_dist': e_dist,
'e_dist_res': e_dist_res,
'e_dist_sdev': sqrt(abs(dah_Matrix[0, 0])),
'e_dist_nstat': sqrt(abs(nstat_Matrix[0, 0])),
'b_az': b_az,
'b_az_res': b_az_res,
'b_az_sdev': sqrt(abs(dah_Matrix[1, 1])),
'b_az_nstat': sqrt(abs(sin(radians(nstat_Matrix[1, 1])) * e_dist)),
'o_ht_diff': o_ht_diff,
'e_ht_diff': e_ht_diff,
'o_ht_diff_res': o_ht_diff_res,
'e_ht_diff_sdev': sqrt(abs(GMatrix[2, 2])),
'e_ht_diff_nstat': sqrt(abs(n_GMatrix[2, 2]))
}
return coords, dah_bases