Elevation & Terrain Tools

How high is a place? These tools answer that question for any point on Earth. The Elevation Finder and the Altitude Finder let you click anywhere on an interactive map — or search for a place by name — and return the elevation at that point in both meters and feet. Elevations come from the Open-Elevation service, and each lookup is paired with a reverse-geocoded address so you can confirm you are looking at the right spot. The readout also includes derived values such as the estimated air pressure from the International Standard Atmosphere model and the corresponding oxygen percentage, which is useful context for hiking, trekking and high-altitude travel planning.

Both tools are fully interactive: the map responds to clicks, the marker moves, and the numbers update immediately. There is nothing to install and no data to upload — the lookup happens live against open elevation datasets.

Two guides give the background. The digital elevation models article explains what DEMs are and how the well-known datasets differ: SRTM from the Space Shuttle radar mission, ASTER from Japan's optical sensor, and the Copernicus DEM from European radar satellites. It covers resolution, voids and why two sources can disagree about the same hill. The topographic map field guide teaches you to read contour lines — the classic way terrain is shown on paper maps — including how to spot ridges, valleys and cliffs, and how contour spacing reveals slope steepness.

Use this collection to check the altitude of a trailhead before a hike, compare the elevations of two cities, settle a bet about which neighborhood sits higher, or simply explore how the land rises and falls around you. If you are planning a mountain trip, look up the elevation of your base camp and your summit: the difference tells you how much climbing lies ahead, and the oxygen readout gives a rough sense of how thin the air will feel. For students, the tools make abstract numbers concrete — click from a coastal city to an inland plateau and watch the elevation climb, or trace a river from its mountain source to the sea and see the terrain flatten.