rnorris/viking — comment on commit 1d76b08b1abd51ce1266448cfc9d15f4e5dd7a57
File:  line 0
By rnorris:

Well using lowest zoom factor is more likely to work (external things will complain if the area is too large - especially the edit versions).

Could be better with a MIN / MAX or MEAN.

It is just something to prevent the program aborting itself.