1. I don't have a premium Rapidshare account so the file can only be downloaded 10 times before it has to be re-uploaded.
2. The new versions only come with the oceania.dem file. It covers all of Oceania.

From Wikipedia:
The boundaries of Oceania are defined in a number of ways. Most definitions include parts of Australasia such as Australia, New Zealand, and New Guinea, and all or part of the Malay Archipelago. Ethnologically, the islands that are included in Oceania are divided into the subregions of Melanesia, Micronesia, and Polynesia.

Megaduck99

Thanks Smilies,
I will try Kate, but I love Susan... it will be like swapping partners... but if it is for my well being why not.... It is really annoying that Susan can't say the word road properly

NZ Map :  http://rapidshare.com/files/308569921/NewNZ.rar
NZ Buildings :  http://rapidshare.com/files/308571724/BUILDING_NZ.rar

Aussie Map :  http://rapidshare.com/files/308588364/NewA.rar
Aussie Buildings :  http://rapidshare.com/files/308569796/NewA_2_.rar

Password: secretsquirrel

Littlemax9:
Thanks for the mirror.

Megaduck99:
Thanks for the reply.
For your info, somehow I am using an Australia.dem with a file size of 39,413,290 bytes (I think it comes together with the NavTeq maps but I'm not sure).
The size of Oceania.dem in your release is 1,424,790 bytes (about 3.6% of Australia.dem); that's why I suspect that it only covers NZ. If it covers both Aus and NZ, just wonder why the file sizes differ so much!

Ozichileno:
It may not be a bad excuse to swap partner if she cannot pronounce correctly some words .....

Well boys.. I have a Australia.dem file that is 129mb. I have had this file for a long time. And with it I can see every gully, hill and mountain.
http://www.megaupload.com/?d=KRZH1EPB
Thanks to www.fixmygps.net

Geoff

Thanks megaduck. Can anybody advise of how to change the arrow symbol to a car or how to make it smaller? Thanks in advance.

That's the DEM file that originally shipped with iGO8.0 on the Uniden GPS units (And others probably) with Sensis R15

All of the more recent DEM files for Australia have gotten smaller and more general. The main reason for the size difference is simply the level of exact detail.

Think of a dem file as a grid reference of altitude points. NASA used the Space Shuttle topography mission to map the *entire* world by elevation (DEM). they subsequently released it as '1 second' and '3 second' dem data sets. The 'seconds' being seconds of degrees of latitude/longitude between data points. So the 1 second DEM had 9 times more data than the 3 second dem.

So the newer Oceania dem files contain *much* less detail and small elevation irregularities will not show up. *Unless* they use specific, non-regular elevation points and a smoothing algorithm to *restore* missing data. I doubt they do this as it would use enormous amounts of RAM for the reconstructed data and equal amounts of CPU time.

Now the .DEM file extension is used by ESRI Arcview for its 'Digital Elevation Model' files. I don't know if they are the same filetype, but As I can access ArcView at work I will check tomorrow.

Megaduck99

Mirrors

Maps
Australia_Telestra_R16.1_090708
 http://www.filefactory.com/file/a1cgae5 ... 090708.fbl
NewZealand_Telestra_R5_090708
 http://www.filefactory.com/file/a1cgaf1 ... 090708.fbl

POI
Australia(Premium)Telestra_R16.1_090617
 http://www.filefactory.com/file/a1cgh0e ... 090617.poi
NewZealand(Premium)Telestra_R5_090521
 http://www.filefactory.com/file/a1cgh02 ... 090521.poi

This is very interesting. I suppose it's being a bit anal, but I would like as much topo. detail as possible.

Can someone please tell me if the large dem file works with the new map files and with Igo8.3?

If not is there a large dem file out there which works with 8.3 and the latest maps?

(Would this mean there is no point in ever changing the dem file?).

I assume that the larger detail may have an impact in the re-drawing time of the maps on the Sat-nav- can this result in a noticeable delay?

(Also, thanks to Megaduck for your many useful posts -and to Geoff also. I'm sure there are many like me who don't post often, but nonetheless appreciate yours!

Very interesting!!

Thanks man!

@ndiyou,

The dem files are interchangeable between iGO versions. As are the building, poi & speedcam files.

Cheers, Ian

Thanks Megaduck your work is appreaciated. I now have all the missing roads and roundabouts in my area.

Well done !!

Thanks,Ian.

I downloaded Geoff's (large) Dem file and it seems to work fine!

Also it appears that using megaducks new R16 map most/many roads and streets (at least in the Hills/Western Suburbs of Sydney) have speeds posted on them. A huge improvement over the Navteq map as I don't think I ever saw a speed limit EVER!

Great work guys!

Hi

Does anyone know what will be the result of having multiple DEM files ie Oceania 2006.06, Australia 2006.06 and the Original (big) Australia 2005.07 will the system use all the data or ignore the older Australia file ???

Rgds Phill

Usually it takes the information from the most detailed map it has at the particular point it is trying to display. As you move out of the Australia area, the Oceanic DEM will come into play.

Cheers