In "Before Starting Cartography": "The Superior Cartography Skillcape gives -30% Survey Interval which makes Skill XP boosts very valuable if you wish to go for full map mastery since this will reduce the time it takes to reach level 120."
The Superior Cartography Skillcape requires a Cartography skill of 120. As written, it seems to recommend getting the skillcape before starting cartography. Why is it even mentioned here? The relevant part of this sentence, for "Before starting", is "Skill XP boosts [are] very valuable if you wish to go for full map mastery.", which seems too obvious to require mentioning.
Perhaps move this to the "Mastering the Map" section, slightly rewritten as, "The Superior Cartography Skillcape, which requires Cartography 120, gives -30% Survey Interval. This is an important aid in attaining full map mastery."