//Basic idea of what it is supposed to do
OziExplorer is a generalized system that allows you to import an arbitrary map image, which is then calibrated (georeferenced) so OziExplorer can use any pixel position on the map to determine the true geographic position. There are two more basic sets of functionality it provides. First it allows you to notate and measure the map. Secondly it communicates with your GPS to give you real-time positioning inside OziExplorer.
OziExplorer's distinction from other products is that it can import arbitrary maps. MapSource only works with the proprietary maps produced by Garmin. Consequently you have more options for getting mapping data to areas you want, and it also allows you to generate your own maps. This might not be as vital in the US, where MapSource has good coverage, but in Singapore, for instance, the World MapSource disk is anemic and useless. However, for example, I have this great satellite image of Singapore that presumably OziExplorer could consume and allow me to use with my GPS.
The immediate limitation I noticed for Garmin GPSs (I have a Garmin Etrex Vista) is that maps you create from scratch with OziExplorer cannot be uploaded into the GPS. So if you create a custom map, the only way to use it is to have a laptop with you receiving location data from the GPS, or by uploading just the waypoints and routes created on your custom map up to the GPS. The third work around is to buy a different brand of GPS that DOES allow it. There is no way to view the map you created on OziExplorer on the the Garmin GPS display. Thanks for another proprietary format, Garmin. (PROJECT-IDEA: People should investigate how to create their own basemaps that are Garmin-compatible, whether Garmin likes it or not.}
//Background
OziExplorer is written by one guy, with the intention of making a gps/mapping system for planning his 4wd trips. In some ways this might be good -- you stand a chance of being able to communicate with someone who knows something, rather than faceless MapSource and their abysmal technical support staff. On the other hand, writing software like this would require him to know a broad range of subjects in good depth. Since I haven't used the software yet, it's hard to say if he has succeeded.
In the 'About' section of his help file, he is quite straightforward about the philosophy of the software and his intentions. I respect that. The guy recognized a tool he needed, couldn't find the tool already, so he built it for himself. Fortunately for me, I need the same tool, too.
...coming in Part 2.... How well does it work, and is it up to the task?