forked from hans/Nominatim
So far we've used a buffer around a place node to define its potential address reach. This had two problems: the buffer was so large that addresses often contain false positives and the buffer is really distorted when getting closer to the poles. Change the buffer here to draw a bounndig box at a certain distance in meter. This means that we always use the same box everywhere on the planet and can make the extent much smaller. Using a box has the advantage that it is much faster to figure out if a point is within the box.