This is an example of a simple 3D map. It is from a Porsche 911 Fuel Map at Partially Open Throttle. This example is a 12x12 map of 144 pieces of data highlighted in orange.

Example of a 3-D Map

Porsche 911 Fuel Map - Partially Open Throttle - Engine RPM vs. Load vs. Fuel
3E 0C 03 08 08 08 08 15 1B 0D 0C 0D 0C 6A 4F 0C 05 07 06 06 07 0D 0D 0C 0D 0D 1C 6A 6E 6E 6E 6C 6B 6E 6D 6F 78 7B 7B 7B 6E 6E 6E 6C 6B 6E 6D 6C 78 7B 7B 7B 6A 6A 67 68 6A 6D 73 74 78 7B 7C 7C 64 66 67 69 69 69 6D 6E 6F 6F 72 71 64 64 69 69 69 6A 6D 6E 6E 72 7A 75 64 65 68 6A 6A 6A 6C 6E 6F 6F 73 75 64 66 69 69 69 6C 6D 6F 71 7C 94 88 68 6A 6A 6D 6E 71 73 77 7D 8C 83 8E 6A 6A 6C 6F 70 71 76 79 7F 8F 91 91 6A 6A 6D 6F 6F 6F 7A 7F 84 89 8E 93 6E 6E 6E 71 73 75 7A 80 89 89 93 8B 71 71 71 71 75 78 80 87 90 97 96 8A

Red        Type designator #1
Blue       Size #1 - 0Ch is 12 
Green     Axis #1, RPM
Red        Type designator #2
Blue        Size #2  - 0Ch is 12 
Violet      Axis #2, Load
Orange  144 data values, Fuel, 12x12 map