Databases Reference
In-Depth Information
The Earth Is Not a 2D Plane
MongoDB's geospatial indexes assumes that whatever you're indexing is a flat plane.
This means that results aren't perfect for spherical shapes, like the earth, especially near
the poles. The problem is that the distance between lines of longitude in the Yukon is
much shorter than the distance between them at the equator. There are various
projections that can be used to convert the earth to a 2D plane with varying levels of
accuracy and corresponding levels of complexity.
