Tôi đã bị mắc kẹt trong cùng một vấn đề vài tuần trước, tôi đã tìm ra một kịch bản python có thể giúp đỡ. Giải pháp gốc từ đây
import pyproj
import math
import numpy as np
from statistics import mean
import scipy.optimize as optimize
#This function converts the numbers into text
def text_2_CRS(params):
# print(params) # <-- you'll see that params is a NumPy array
x_0, y_0, gamma, alpha, lat_0, lonc = params # <-- for readability you may wish to assign names to the component variables
pm = '+proj=omerc +lat_0='+ str(lat_0) +' +lonc='+ str(lonc) +' +alpha=' + str(alpha) + ' +gamma=' + str(
gamma) + ' +k=0.999585495 +x_0=' + str(x_0) + ' +y_0=' + str(y_0) + ' +ellps=GRS80 +units=m +no_defs'
return pm
#Optimisation function
def convert(params):
pm = text_2_CRS(params)
trans_points = []
#Put your control points in mine grid coordinates here
points_local = [[5663.648, 7386.58],
[20265.326, 493.126],
[1000, -10000],
[-1000, -10000],
[1331.817, 2390.206],
[5794, -1033.6],
]
# Put your control points here mga here
points_mga = [[567416.145863305, 7434410.3451835],
[579090.883705669, 7423265.25196681],
[557507.390559793, 7419390.6658927],
[555610.407664593, 7420021.64968145],
[561731.125709093, 7431037.98474379],
[564883.285081307, 7426382.75146683],
]
for i in range(len(points_local)):
#note that EPSG:28350 is MGA94 Zone 50
trans = pyproj.transform(pyproj.Proj(pm), pyproj.Proj("EPSG:28350"), points_local[i][0], points_local[i][1])
trans_points.append(trans)
error = []
#this finds the difference between the control points
for i in range(len(points_mga)):
x1 = trans_points[i][0]
y1 = trans_points[i][1]
x2 = points_mga[i][0]
y2 = points_mga[i][1]
error.append(math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2))
print("Current Params are: ")
with np.printoptions(precision=3, suppress=True):
print(params)
print("Current average error is: " + str(mean(error)) + " meters")
print("String to use is: " + pm)
print('')
return mean(error)
#Add your inital guess
x_0 = 950
y_0 = -1200
gamma = -18.39841101
alpha=-0
lat_0 = -23.2583926082939
lonc = 117.589084840039
#define your control points
points_local = [[5663.648,7386.58],
[20265.326,493.126],
[1000,-10000],
[-1000,-10000],
[1331.817,2390.206],
[5794,-1033.6],
]
points_mga = [[567416.145863305,7434410.3451835],
[579090.883705669,7423265.25196681],
[557507.390559793,7419390.6658927],
[555610.407664593,7420021.64968145],
[561731.125709093,7431037.98474379],
[564883.285081307,7426382.75146683],
]
params = [x_0, y_0, gamma,alpha, lat_0, lonc]
error = convert(params)
print(error)
result = optimize.minimize(convert, params, method='Powell')
if result.success:
fitted_params = result.x
print(fitted_params)
else:
raise ValueError(result.message)