I can write a very short C++ program (of poor coding quality
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) that will take a number as input and will produce a .txt file with just #setland 1 #poptype 100 #setland 2 #poptype 100, with #setland going up to that number, and then you can take that and copy-paste it to your map, I guess.
Would you like me to?
(Though unless you want to compile it yourself [in which case you probably already have the knowledge to program it yourself], it will be windows only)