Fixed one typo and deleted one superfluous word

row 125 : * Using the resources you above, create a base map using some or all of the
 
Either there is somthing missing after "you" or "you" is superfluous.
Decided to remove "you"

row 153 :   map has become too vsually busy due to the added layer(s), deselect the

"vsually" misses a "i" should be "visually"  Fixed
Merge pull request #350 from DiGro/patch-1

Fixed one typo and deleted one superfluous word