This powerful geodesy app allows you to convert coordinates between many of the world's coordinate systems, compute geoid offsets, and estimate the current or historic magnetic field for any location. It also includes a calculator tool as well as surveying tools to compute the point scale factor, grid convergence, traverse, and inverse. You can also store multiple points and compute boundary length and area on them, or import/export them to CSV files.
The app uses the PROJ4 library and a lookup file containing projection and datum parameters to support over 1700 coordinate systems. Lat/lon, UTM, US State Plane, and many, many others are supported. You can also create your own coordinate systems if you know the parameters.The app also supports affine transformations to allow you to set up local grid systems. See https://www.binaryearth.net/Miscellaneous/affine.html for details.
The app either takes manual coordinate input or uses your current GPS location. The computed location can be displayed in Google Maps via your web browser with a single button press. It also supports MGRS grid references.
You can export any lat/lon, UTM or transverse Mercator coordinate systems to a HandyGPS datum (.hgd) file for use as a custom datum in HandyGPS.
The magnetic field calculator page computes the Earth's current or historical magnetic field at a given location. The magnetic declination computed is useful for compass navigation since it represents the difference between true north and magnetic north. Field inclination and total intensity are also computed. This tool uses the International Geomagnetic Reference Field model (IGRF-12).
Permissions required: (1) GPS - to determine your location, (2) SD card access - to read and write user projections file.ULTERIORI INFORMAZIONI
5.2: Improvements to calculator tool, including adding haptic feedback option.
5.1: Added trig functions to calculator tool.
5.0: Improved calculator tool on main menu.
4.9: Traverse and Inverse page now use Deg/Min/Sec format for azimuth instead of decimal degrees.
4.8: Improvements to calculator, Traverse and Inverse pages.
4.7: Added a calculator as well as Traverse, and Inverse computations to main menu.
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