This is the one I use:
http://www.ordre-des-neos-templier.f...S/gisement.rar
It's only 1000m and, like the others, can only be viewed in the last 2 zoom levels. The others I've seen ported over from SH3 were 1500m, but couldn't really see the full thing due to the limited zoom levels and it was really low rez, very splotchy and faded.