Re: [Boost-users] boost::geometry::index::rtree with CoordinateSystem

Subject: Re: [Boost-users] boost::geometry::index::rtree with CoordinateSystem
From: Adam Wulkiewicz (adam.wulkiewicz_at_[hidden])
Date: 2014-03-16 14:28:47

Hi,

Ola Martin Lykkja wrote:
> First: I am pretty impressed with the index::rtree template. It is *VERY* useful in my current project!

I'm glad that it's useful to you.

> Thanks for your reply! For my application, I am ok, for the moment, with the relatively small errors that using the
> cartesian domain gives me. I have created two tickets (9758 and 9759)

Thanks.

> What is the difference between spherical_equatorial and geographic and spherical? The documentation is rather unclear.
>

In both spherical CS points are on the surface of a sphere. In 
geographic, on the surface of an ellipsoid. In geographic and 
spherical_equatorial the latitude is in the range [-90S,90N] degrees. In 
spherical in the range [0N,180S].

More reading:

http://en.wikipedia.org/wiki/Spherical_coordinate_system
http://en.wikipedia.org/wiki/Equatorial_coordinate_system
http://en.wikipedia.org/wiki/Colatitude
http://en.wikipedia.org/wiki/Geographic_coordinate_system
http://en.wikipedia.org/wiki/World_Geodetic_System
http://en.wikipedia.org/wiki/Ellipsoid

Regards,
Adam