P.G. (tas) posted:

Hi Theo, can you tell me if the 25k maps are available in rastor format or are you talking about paper maps? Cheers

Jeremy posted:

Theo......... can u tell me where u get the 25K maps or would you consider selling me some for Vic High Country ????? jeremy@murraytrek.com.au
I use Raster maps but go back to paper for main work........Thanks in advance

Rob Duncan posted:

Just be carefull that you use the same Map datum system for your GPS and maps. ie AUS grid 84, or Aus grid 66 or the latest grid system. you can find this out on your map information, if you set the wrong one in your GPS you could be out by around 200m.

Greg Harewood posted:

Theo - WGS84 is not a grid system but a datum. A lot of maps use UTM (a grid/coordinate system) and WGS84 (a datum). In the last two years GDA94 has been introduce and is now the 'preferred' datum (almost identical to WGS84 - but it is different). Most of the old maps I come across use datum’s such as AGD66 or ADG84 (these are not Aus grids as you mentioned but datum’s)- Aus maps generally using UTM or Transverse mercator projection based grids. Datum conversions are not a problem using modern GPS's and programs such as OziExplorer. You simply must be aware of what your GPS is set to, what your datum the map is your using and what you mapping program is currently set on. It can be confusing. Cheers Greg