New Whole Earth Reference Library · Wayfinding
Description: A web-based and mobile topographic mapping platform used by backcountry travelers, mountain guides, and search and rescue teams. Layers include topo maps, slope angle shading, satellite imagery, snow data, and weather overlays.
Why it matters: Most mapping tools are built for road navigation. CalTopo is built for terrain — for people who need to understand what the land actually looks like before they’re in it.
Strengths: Exceptional depth of map layers; trusted by SAR professionals; seamless sync between web and mobile.
Limitations: Free tier is limited; meaningful use requires a paid subscription ($20–$50/year).
Link: caltopo.com
Cost: Free & Paid
Note: If you spend time in the backcountry, this is the tool to learn.
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