map arrangement

[Galdred]

How are map "blocks" arranged for a given mission?
Are there higher level maps that indicates which blocks are available at each position? Are there connectors between blocks, or connection rules?
I looked in the map editor, but I could only see the block themselves, no higher level logic to arrange them.

[Meridian]

Yes, blocks are put together into a map using a map script.

You can find examples of map scripts in vanilla ruleset file called map mapScripts.rul

see also: https://www.ufopaedia.org/index.php/Ruleset_Reference_Nightly_(OpenXcom)#Map_Scripts

[Galdred]

Thanks!
The script file is simpler than I thought.
So roads can be placed between blocks on some maps?

[Meridian]

Yes, like for example terror mission maps.