Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: RE: reverse vincenty
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: reverse vincenty
Date
Wed, 6 Oct 2010 11:41:25 +0100
H Wright is presumably asking about commands, not functions. There is no inbuilt function in Stata (or Mata) for this calculation. A user-written Mata function should be perfectly doable.
Also, -vincenty- is a user-written command from SSC (Austin Nichols).
But I don't know of any such code.
Nick
[email protected]
H Wright
I have been using the vincenty function to calculate
distances between latitudes and longitudes. I would now like to find
points that are X miles from a given coordinate.
Is anyone aware of a function that would calculate a latitude of a new point if all other inputs are know?
For example :
vincenty 41.75499 -124.194 ? -124.194, hav(5)
So I want to know the latitude of the point 5 miles away on the same longitude?
I looked at the code in the vincenty ado file and it is beyond my mathematical ability to calculate this number myself.
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/