Maps are printed in two dimensions (2D), but the land they represent is in three dimensions (3D). How can a 2D map allow you to visualise the 3D land shape? The coastline on Topo50 maps represents the mean high-water level. Contour lines are the orange/brown lines on the map that indicate the 3D shape of […]
About the author
Heather Grady
Heather Grady is an instructor with Outdoor Training New Zealand
The 2026 Wilderness Outdoor Photographer of the Year competition
25 huts to visit in 2025
A lofty location for Brass Monkey
Tongariro Northern Circuit huts no longer first-in, first-served during winter
Why we’re putting on weight
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