Classic Embroidery have a very extensive range of cross-stitch map samplers - almost 150 of them!
The kits are all produced on both 14ct aida or 28ct evenweave and use Anchor threads. The threads are pre-sorted onto organiser cards. There are clear black and white charts with separate backstitch diagrams. There are some fractional stitches used to get a good level of detail in the pictures in the designs.