Yes, there are limits beyond which the SnakeGrid algorithms will return an “out of bounds” error – these occur when attempting to use it away from the project for which it was designed.

However, as with any map projection, there are also locations where the algorithms will return an answer but the distortion is beyond the acceptable levels. This is especially the case where there are significant terrain elevation differences a few kilometres away from the route for which the grid was designed.

In both these cases, the locations can be clarified using the distortion map originally supplied with the grid.