iPhones made in 2014+ have a barometer for real-time elevation tracking. A barometer measures air pressure, which is crucial for calculating altitude changes. The native iPhone Compass app has a built ...

For more than a decade, survey flights have crisscrossed the United States using gravity instruments to calculate a new sea level in an effort that will save the country billions of dollars on ...

Kate Dignan has summited one 14er — she thinks it was probably Longs Peak, but she’s done her best to forget the experience. That trip, and countless photos from hikers around the state, got her ...

“The snow level has gone from the surface along the Oregon and southwest Washington Coastline to 1000 feet each morning,” Storm Tracker 2 Meteorologist Rhonda Shelby said. The higher up you go into ...

CHESAPEAKE, Va. — Using radar imaging to measure elevation changes, Virginia Tech researchers have uncovered an important gap in planning for sea level rise in the Chesapeake Bay. In some areas, sea ...