Inconsistent catchment areas [FS#5661]:

	Due to performance decisions the catchment area for cargo accepted

	by a station for delivery to houses or industries differs from the

	catchment area for cargo that is delivered to stations from houses

	or industries.

	Conceptually they work the same, but the effect in game differs.

	They work by finding the closest destination "around" the source

	which is within a certain distance. This distance depends on the

	type of station, e.g. road stops have a smaller catchment area than

	large airports. In both cases the bounding box, the smallest

	rectangle that contains all tiles of something, is searched for the

	target of the cargo, and then spiraling outwards finding the closest

	tile of the target.

	In the case of a station with two tiles spread far apart with a house

	that is within the station's bounding box, it would be possible that

	the spiraling search from the house does not reach one of the station

	tiles before the search ends, i.e. all tiles within that distance

	are searched. So the house does not deliver cargo to the station. On

	the other hand, the station will deliver cargo because the house

	falls within the bounding box, and thus search area.

	It is possible to make these consistent, but then cargo from a house

	to a station needs to search up to 32 tiles around itself, i.e. 64

	by 64 tiles, to find all possible stations it could deliver to

	instead of 10 by 10 tiles (40 times more tiles). Alternatively the

	search from a station could be changed to use the actual tiles, but

	that would require considering checking 10 by 10 tiles for each of

	the tiles of a station, instead of just once.