Could be more helpful if the X's were smaller, and it showed you where to look by shading in where you're meant to look, like this:
-\xxxxxxxxxxxxxxxxxxxxxxxxxxx/
--\xxxxxxxxxxxxxxxxxxxxxxxxx/
---\xxxxxxxxxxxxxxxxxxxxxxx/
----\xxxxxxxxxxxxxxxxxxxx/
------\xxxxxxxxxxxxxxxxxx/
--------\xxxxxxxxxxxxxxxx/
---------\xxxxxxxxxxxxxxx/
----------\ xxxxxxxxxxxx/
-----------\ xxxxxxxxx x/
------------\ xxxxxxxxx/
-------------- SNIPER
Where the X's are (^ up there ^) is where you should/can be looking, on your maps you should make it so the x's are a bright shade of pink/red, do this for all the sniper spots and this will win the post of the month award for sure