#Finding or measuring vector unit width of a tile
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https://www.reddit.com/r/Dota2Modding/comments/2d2bik/for_reference_the_dota2_map_is_68_tiles_wide_and/ I believe the answer is 64x64 based on this. The only other way I can think to really measure this is with trial and error of spawning maps at offsets.
reddit
15 votes and 6 comments so far on Reddit
in hammer you can set the grid size to whatever you want. so you can look at what its set to and count the grid.