Hi John,
Excellent! Connceptually, that's exactly what I was looking for. I
will probably need to make some changes to the code but it's a great
start.
Thank you.
Alex Donnini
On Aug 22, 2:10 pm, Maps.Huge.Info (Maps API Guru)
cor...@gmail.com wrote:
This example using a Google map may be
This will help you.
http://www.movable-type.co.uk/scripts/latlong.html
2009/8/22 Mark Murphy mmur...@commonsware.com:
alexdonnini wrote:
I had already considered using the GCC formula (I did not know the
name GCC). Unfortunately, the only lat/lng information I have is mine,
none other.
I had the same problem and found my sources at
http://williams.best.vwh.net/avform.htm
. Ed Williams goes into detail on great circle navigation. I took his
formulas for distance between points and true course and translated
them into PHP. Projecting a point is given as well. The translated
Thanks all for the suggestions.
Mark, I am well aware that there is an infinite number of points on
the circle at distance X from a known location. To start with, for my
application, my plan is to find 16-64 of the locations at distance X
from my location. That should be sufficient.
The problem
alexdonnini wrote:
Mark, I am well aware that there is an infinite number of points on
the circle at distance X from a known location. To start with, for my
application, my plan is to find 16-64 of the locations at distance X
from my location. That should be sufficient.
OK, which 16-64?
Thanks. I think I will use the parametric formulas for calculating the
coordinates of points on a circle using increments of 1 degree. If
that turns out to be too ambitious (because of the performance hit
generated by the additional processing once I have calculated the 360
possible locations), I
This example using a Google map may be useful: (JavaScript)
http://maps.huge.info/dragcircle2.htm
-John Coryat
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Look up the Great Circle Calculation. That will provide you with the method
for finding x within a given y radius. As for finding other geo coordinates,
you'll need to find a data source for those or make your own set of data to
work with. You might be able to use some Google API for that as well.
Hi Donn,
Thanks for the suggestion.
Please ignore my other post on this same subject.
Alex Donnini
On Aug 21, 1:29 pm, Donn Felker donnfel...@gmail.com wrote:
Look up the Great Circle Calculation. That will provide you with the method
for finding x within a given y radius. As for finding
Donn,
I had already considered using the GCC formula (I did not know the
name GCC). Unfortunately, the only lat/lng information I have is mine,
none other. This is why the problem is a little trickier.
Thanks.
Alex
On Aug 21, 1:29 pm, Donn Felker donnfel...@gmail.com wrote:
Look up the Great
alexdonnini wrote:
I had already considered using the GCC formula (I did not know the
name GCC). Unfortunately, the only lat/lng information I have is mine,
none other. This is why the problem is a little trickier.
There are an infinite number of latitude/longitude combinations at a
distance
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