Downloaded a topo map, loaded it into BaseCamp and made sure it was OK. Then I built it with MapBuilder and sent it over to the Garmin where it created a gmapsup.img in the right directory. It was recognized by the 255w...meaning it was listed under maps, but...

I see no difference in what is displayed. Whether I select the topo map (gmapsup) or not I can't for the life of me see a difference. What am I missing? Would it only be visible at very low resolution - meaning a very big scale??

Thanx for any pointers.

siberian

Well, I don't know what map do you mean - it is possible in some cases, that a map only in big scale show details.

Did you deactivate your street map? It also could be, that the City Navigator covers the other map.

You mean that the topo is not an overlay? You have to choose to view either the topo OR the street map? Sorry for the basic nature of the questions.

siberian

Yes of course, most maps are only for separate use. But I don't know which topo map do you speak about.
Sometimes maps are also made as transparent overlay, e.g. OSM or other free maps, but never original Garmin maps.

I loaded mti_ak.gmapi

I assumed they would be overlay maps which is why I wasn't getting anything on the Nuvi. On the Mac there was topo shown which is why I assumed it would display on the small Nuvi screen. Guess a minimum display size is needed.

siberian

I don't know this map, that's why I can't tell you something about it. From where do you have it?

Unfortunately this Alaska-Topo is down, http://www.navitotal.com/showthread.php?6904-Garmin-TOPO-Alaska-Enhanced-v.2.0. But maybe PiEtU or Catymag make a reupload.

Got it from GPSFileDepot Forums since link is down on this site. Still need part1 of the Europe one....:rulz:

siberian