Printmaps is currently limited (for technical reasons) to maps of max 1330mm (or 133cm) side length. If you need a bigger map you can create two adjacent maps (make sure to keep a little overlap) with identical settings (zoom level, scale percentage, rotate degrees, map style, etc).
Then stich the two map files together in Photoshop or Illustrator. Procedure in Photoshop:
- Open both target PSD and source PSD in Photoshop
- Double the canvas size in the target PSD, plus put a guide to the edge of the first map
- Select all layers of the source PSD
- Choose Layer> Duplicate layers, and then choose the target PSD where to duplicate them to
- Move all layers to the right position in the target PSD (the guide comes handy here)
- Fine-tune the position now using features like streets in the overlap section, until no seam is visible anymore
- Now delete the overlap section in half the layers with the help of the guide