HexWorld
HexWorld a hexagon map example with code
...It also shows that it is possible to place this grid on a simple coordinate system - x-y- axis. It is the first step - the creation of an interface that later might be used in a strategical game or whatever. Comes with Full Lazarus/Delphi Code. For Educational Purposes! Now new version 2020 with bugfixes.
Work hard and you will understand.