Hey Tom!
It's great to hear from you :). I did think about using a UTM
projection but the region of interest (Turkey) is too big. It requires
6 UTM zones to cover it and if the point is around the boundary i
thought that it would create some problems. I wasn't aware of other
distance/area
Hi Robert,
Thank you so much! I just tested the code and it works
beautifully. This is exactly what I wanted to do. I had a feeling
that it could be calculated analytically but I kept messing up my
calculations.
Thanks again!
Harry
On Wed, Oct 7, 2009 at 10:47 AM, Robert J. Hijmans
Hi Harry,
The key issue is that you need to select the (Euclidean) coordinate system. For
example, to
represent the whole world, there are many possiblities
(http://www.radicalcartography.net/?projectionref). If you are working with the
great circle
distance, make sure that the geographic
Harry, I think you are after something like the function below (I did not
test it much). Robert
# based on code at http://www.movable-type.co.uk/scripts/latlong.html
# © 2002-2009 Chris Veness
# license: LPGL; without any warranty express or implied
# R version by R Hijmans
# calculate
Dear R-sig-geoers,
I am stuck with a problem and i was hoping if you could help me.
Suppose i am given a coordinate in lat/long (say 25 lat 35 long) and a
great circle distance (say 10km). Also assume that i am given an angle
with respect to latitude (an angle from the x-axis say 30
