gallet Posted September 16, 2008 Posted September 16, 2008 What is the difference if a nuvi has a gmapsupp.img or a gmapprom.img map file? They both appear to do the same thing. thx Quote
+coggins Posted September 16, 2008 Posted September 16, 2008 (edited) As far as the Nüvi is concerned, they are the same. But to MapSource or RoadTrip, gmapsupp.img is the file that gets whacked when you load up a new mapset and gmapprom.img doesn't get touched. The Colorado and Oregon also use this scheme to protect their TOPO or BlueChart/Lake maps. Edited September 16, 2008 by coggins Quote
gallet Posted September 16, 2008 Author Posted September 16, 2008 As far as the Nüvi is concerned, they are the same. But to MapSource or RoadTrip, gmapsupp.img is the file that gets whacked when you load up a new mapset and gmapprom.img doesn't get touched. The Colorado and Oregon also uses this scheme to protect their TOPO or BlueChart/Lake maps. OK thanks, Does that mean that if a gmapprom file was renamed to a gmapsupp it would make no difference. IOW is the only difference the suffix to stop an accidental overwrite. Quote
+coggins Posted September 16, 2008 Posted September 16, 2008 give this a look: On Nuvi you can have map files with these names on the internal memory:gmapprom.img (normaly preinstalled maps) gmpaprom1.img (used when both EU and US are on the GPS) gmapsupp.img (maps downloaded to the GPS) gmapbmap.img (base map) gmapoem.img (Oem maps?) On SD card you can only have gmapsupp.img. Quote
+g-o-cashers Posted September 16, 2008 Posted September 16, 2008 On the OR/CO they are two names for the same thing. The only difference being that Mapsource generates the gmapsupp name to avoid overwriting the gmapprom preinstalled image. I've swapped them on a Colorado and everything seemed to work the same. GO$Rs Quote
+trainlove Posted September 16, 2008 Posted September 16, 2008 What is the difference if a nuvi has a gmapsupp.img or a gmapprom.img map file? They both appear to do the same thing. thx To me it sounds like gmapprom is a PROM map, i.. read only. gmapsupp sounds like it's supplemental, and theother answer is probably right. That's the one that would get loaded if you load any detailed maps such as Topo or whatever. And you probably can get back to the basemap gmapprom by turning off detailed maps. My ancient computing age is showing here. Quote
Motorcycle_Mama Posted September 16, 2008 Posted September 16, 2008 The GMAPPROM.IMG is the preloaded map file. The GMAPSUPP.IMG is the supplemental map file. Quote
Newb888 Posted April 12, 2009 Posted April 12, 2009 Can you change the name without any problem to gmapprom from gmapsupp ? Quote
+g-o-cashers Posted April 12, 2009 Posted April 12, 2009 On the Oregon and Colorado they seem to be interchangeable if the files are in internal memory -- on the SD card only gmapsupp.img is supported. Quote
+jotne Posted April 12, 2009 Posted April 12, 2009 You can rename gmapsupp.img to gmapprom.img and the other way around. One very important difference is that gmapsupp.img is over written when you store new map to the GPS, gmapprom.img is not. Quote
+DH9BV Posted August 20, 2011 Posted August 20, 2011 I have 8 (EIGHT!) different maps stored on my Oregon - and it works perfectly. There are four maps on the SD-card and four on the built-in storage. The names are: GMAPPROM.IMG GMAPBMAP.IMG GMAPSUPP.IMG GMAPTZ.IMG You can use the filenames twice, once on the sd-card and once on the built-in storage. If it allready exists, you only have to rename the file GMAPSUPP.IMG into one off the other filenames, before you store it on your Garmin. Quote
+Red90 Posted August 20, 2011 Posted August 20, 2011 On any of the handhelds that have been released since the Colorado or any of the newer 4 letter Nuvis, you can use any name you want for the map files. Quote
+myotis Posted August 20, 2011 Posted August 20, 2011 Can you change the name without any problem to gmapprom from gmapsupp ? Yes that can cause significant problems. Do NOT rename gmaprom. It will normally contian your basemap and renaming it can cause problems like slow redraw/or an empty screen when you are zooned out. Now you can remname gmapsupp to anything you want (well I would not rename it something gmaprom or another name built in maps can have). Quote
gallet Posted August 20, 2011 Author Posted August 20, 2011 (edited) My zombie thread calls... and I must respond. Er... hello zombie thread, long time no vide. Well it's been nice seeing you again after all these years. Would one of you nice people remember to bury this again when you're done. Thx. edit: maybe stab it through the heart with a rusty stick. Edited August 20, 2011 by gallet Quote
+Red90 Posted August 21, 2011 Posted August 21, 2011 (edited) Can you change the name without any problem to gmapprom from gmapsupp ? Yes that can cause significant problems. Do NOT rename gmaprom. It will normally contian your basemap and renaming it can cause problems like slow redraw/or an empty screen when you are zooned out. Now you can remname gmapsupp to anything you want (well I would not rename it something gmaprom or another name built in maps can have). No, you are wrong. Firstly the basemap is gmapbmap.img Secondly the GPS knows the difference. You can name them anything. I run multiple basemaps and detailed map on my Colorado and they are named what makes sense. The unit figures it out just fine. gmapprom.img is preinstalled maps like City Navigator or Topo USA depending on what came with the unit. Edited August 21, 2011 by Red90 Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.