Thread: Are there any way to visually compare two map versions in Basecamp or any tool that can view gm

Originally Posted by icedagger

I want some tool that can compare the two image of map to see if which area are changed. The same idea like source code compare tool or image compare tool.

It is not impossible! Garmin map format is proprietary. Accordingly it is not common enough to be of interest to developers in compare with graphics formats.

P.S. Only one trick take place for maps with the old non-NT specification. These maps can be decompiled to source text format for a non-official editor like old and good cgpsmapper (polish format) or some others free project. After that you have a possibility to compare source for seeking changes. Do not feed hopes about any visualisation. Only such propeties of map objects as coordinates, types and labels may be reviewed.