Strike and Dip 对比 MagVar 2020 的使用情况和统计数据

Strike and Dip turns your iPhone into a pocket transit. Take strike & dip measurements, bearings, plunge, and all that geological goodness, while simultaneously getting your latitude, longitude, and elevation. Save your measurements as notes, and add photos to your notes. Now also with maps (geological in the U.S. and some other parts of the world) that show the locations of all your saved data. Customizable to how you work: choose between azimuth and quadrant formats for bearings, three formats for coordinates, meters and feet, and three different formats for strike and dip.

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MagVar 2020

MagVar 2020 is targeted towards anyone interested in navigation. This includes, pilots of aircraft, captains of sea going vessels, cartographers, engineers and surveyors. Anyone who uses maps and a compass will find the declination calculation (also referred to magnetic variation) very useful. (Declination is the difference between true and magnetic north and used when plotting a course on a map.) MagVar 2020 calculates the magnetic flux density for any location on the Earth and then uses this data to calculate magnetic variation. The model is accurate for dates ranging from January 1, 2020 up through December 31, 2024. Using the model, the app calculates declination and inclination. As the user pans the map, the magnetic variation is calculated and graphically shown as a map overlay.