Code covered by the BSD License  

Highlights from
LatLon distance

4.7 | 3 ratings Rate this file 134 Downloads (last 30 days) File Size: 1.64 KB File ID: #38812 Version: 1.0
image thumbnail

LatLon distance


M Sohrabinia (view profile)


Find distance between two points based on latlon coordinates

| Watch this File

File Information

This functions finds distance (in km) between two points on Earth using latitude-longitude coordinates of the two points. Distance is calculated using two distance funstions: Haversine and Pythagoran. The first output is based on Haversine function, which is more accurate especially for longer distances.

  latlon1: latlon of origin point [lat lon]
  latlon2: latlon of destination point [lat lon]

  d1km: distance calculated by Haversine formula
  d2km: distance calculated based on Pythagoran theorem

--Example 1, short distance:
  latlon1=[-43 172];
  latlon2=[-44 171];
  [d1km d2km]=distance(latlon1,latlon2)
  d1km =
          137.365669065197 (km)
  d2km =
          137.368179013869 (km)
  %d1km approximately equal to d2km

--Example 2, longer distance:
  latlon1=[-43 172];
  latlon2=[20 -108];
  [d1km d2km]=distance(latlon1,latlon2)
  d1km =
          10734.8931427602 (km)
  d2km =
          31303.4535270825 (km)
  d1km is significantly different from d2km (d2km is not able to work for longer distances).


This file inspired Pathdist.

MATLAB release MATLAB 7.7 (R2008b)
Tags for This File   Please login to tag files.
Please login to add a comment or rating.
Comments and Ratings (3)
17 Apr 2015 Justin Winokur

This code does what it says it should but there are two 2-minute changes to make it much better:

1) make all operations vectorized so you can put a list of lat,lon coordinates. Basically, add a "." before everything. Super easy and much better

2) Add a check for NaN's. If two points are too close, you get NaN when it should be zero. Very easy to do:

>> d1km(isnan(d1km)) = 0;

I hope this helps

17 Mar 2014 Tianyang Li  
13 May 2013 Ian Shapiro

Simple but effective. Does just what it needs to do.

Contact us