Where your area of interest lies at the edge of two adjoining maps or maps, you can combine them to make a single map covering the whole area. This process is known as Merging or Quilting. Any number of maps can be combined in this way.
To merge maps, first open the map that covers the largest part of your area of interest. You can start merging from any map, but the original one will retain slightly better image quality than the ones you merge with it. Move the cursor off the edge of the map in the area of interest, right click and select Merge Map. The popup menu shows a list of maps at similar scale that can be merged. Select one of them, and a the merge process is started. In a few seconds (depending on the size of the map files) the merged result is displayed. You can continue merging other maps to cover your area of interest.
In the Merge Map menu, there is an Anti-alias option. This enhances the quality of the merged result, at the expense of a larger file size. By default this is turned off, to favor small size and performance. If you intend to use the maps on a PDA, we recommend you leave it off. If you are using a high-powered computer and disk space is not a problem, it does give a slightly better-looking result. When Anti-alias is enabled, it is applied whenever you merge a map. It does not affect maps you have already merged.
Notes:
You cannot merge in a map that is the result of a previous merge. This would result in resampling the image twice, which would degrade the quality. You can only merge original sheet maps, and you can add as many maps as you want to a merged map.
The scale of maps for merging is limited to plus or minus 33% from the original map (assuming the maps are scanned at the same DPI).
If you merge a map that is a long way from the original map, the result may appear distorted. If this happens, choose a different map as the starting point.
If you add a map to an existing merged map, and you don't like the result, the Undo command from the Merge Map menu will take you back to the previous result.