The same manner you can merge and split word documents, similarly, you can do that on the Garmin files for GPS. The map files are a complex tool that requires particular information from either of the pages to make a complete output file. This is one app that runs this function with minimal effort. The organized console of the app defines its simplicity and flexibility in the execution of the operations. You can open many files at the same time and access them using the tabbed browsing feature supported on the app. There are two import functions supported on the app, they include the drag and drop usage and the inbuilt file browser. Some of the map files supported include UNL, IMG, and TYP.
You can deal with both single and multiple files in just a few clicks. At the end of the edit functions, you must choose the target location including the name and file extension. Alternatively, you can as well delete the original files and include an unlock code. This is the same procedure you follow when splitting the files. Finally, there is a preview option to check on the output files as a way of confirmation of the processes. What a dedicated tool to merge, split, compile and save multiple files no issues.
GMapTool is licensed as freeware for PC or laptop with Windows 32 bit and 64 bit operating system. It is in maps / gps category and is available to all software users as a free download.