Python - Vincenty's inverse formula not converging (Finding distance between points on Earth)

» python » Python - Vincenty's inverse formula not converging (Finding distance between points on Earth)

By : user2955958

Date : November 22 2020, 10:48 AM

Does that help First, you should convert you latitudes in radians too (you already do this for your longitudes):

code :

u1 = math.atan( (1 - f) * math.tan(math.radians(la1)) )
u2 = math.atan( (1 - f) * math.tan(math.radians(la2)) )
L = math.radians((lo2 - lo1)) # better than * 0.0174532925

2.5325205864224847
2.5325167509030906
2.532516759118641
2.532516759101044
2.5325167591010813
2.5325167591010813
2.5325167591010813

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Haversine Formula in Python (Bearing and Distance between two GPS points)

By : msl

Date : March 29 2020, 07:55 AM

I think the issue was by ths following , Problem , Here's a Python version:

code :

from math import radians, cos, sin, asin, sqrt

def haversine(lon1, lat1, lon2, lat2):
    """
    Calculate the great circle distance between two points 
    on the earth (specified in decimal degrees)
    """
    # convert decimal degrees to radians 
    lon1, lat1, lon2, lat2 = map(radians, [lon1, lat1, lon2, lat2])

    # haversine formula 
    dlon = lon2 - lon1 
    dlat = lat2 - lat1 
    a = sin(dlat/2)**2 + cos(lat1) * cos(lat2) * sin(dlon/2)**2
    c = 2 * asin(sqrt(a)) 
    r = 6371 # Radius of earth in kilometers. Use 3956 for miles
    return c * r

finding the distance between a set of points using scipy.spatial.distance.cdist(X, Y) in python

By : Devanopy

Date : March 29 2020, 07:55 AM

fixed the issue. Will look into that further Two solutions:
calculate the complete matrix directly, and the access the q-th column for the values between A and B[q].

code :

d = scipy.spatial.distance.cdist(A,B)

for q in range(len(B)):
    y = d[:,q]
    print y

for q in range(len(B)):
    y = scipy.spatial.distance.cdist(A,[B[q]])
    print y

How can I get distance between two points on Earth from PostGIS?

By : user3900726

Date : March 29 2020, 07:55 AM

I hope this helps . The result is correct, the input is not. ST_Point accepts input as (lon,lat) while you're verifying it as (lat,lon).

Finding distance between two gps points in Python

By : Amin

Date : March 29 2020, 07:55 AM

it helps some times I have the method below (haversine) that returns the distance between two gps points. Table below is my dataframe. , Try:

code :

distdf1.apply(lambda x: haversine(x['SLongitude'], x['SLatitude'], x['ClosestLong'], x['ClosestLat']), axis=1)

Spherical distance between two points on Earth

By : wendy calio

Date : March 29 2020, 07:55 AM

will help you I am trying to find distance between two points on Earth. But all I know is their latitude and longitude range(Both points lie in that range) and the x and y coordinates on the USA map. I am using data from this website http://www.dis.uniroma1.it/challenge9/download.shtml , Assuming a Mercator projection, convert X-Y to lat-long.