World Coord Sys Tool
100 - 500 downloadsAdd this app to your listsTweets por @Appszoom
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.
* Albers Equal Area
* Azimuthal Equidistant
* Equal Area Cylindrical
* Eckert IV
* Eckert VI
* Equidistant Cylindrical
* Equidistant Conic
* Lambert Conformal Conic
* Miller Cylindrical
* Oblique Mercator
* Oblique Stereographic
* Transverse Mercator
In addition to these projections, the app also supports affine transformations to allow you to set up local grid systems. See http://www.binaryearth.net/Miscellaneous/affine.html for details.
Online help for the app is available at http://www.binaryearth.net/WorldCoordSysToolHelp
The app also includes an IGRF calculator tool which used to be a separate app.
The IGRF calculator computes the Earth's current or historical magnetic field at a given location using the IGRF model. 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 which are useful for geophysics purposes. The input latitude and longitude are in decimal degrees and follow the usual conventions of -ve latitude being south and -ve longitude being west. This tool uses the International Geomagnetic Reference Field model (IGRF-12). See http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html for full details. Years from 1900 through to 2020 are supported.
Permissions required: (1) GPS - to determine your location, (2) SD card access - to read and write user projections file.
Note 1: If editing the user projections file from within the app, make sure to close the app and re-select the coordinate system you've changed otherwise your changes will not be refreshed in the app.
Note 2: The convention used for the rx,ry, and rz values in the 7 parameter toWGS84 values may be different to some other software. If you experience a subtle difference in the results for a user projection which you create, try reversing the signs of these values.
Tags: mollweide proj4, equidistant conic projection agd84, world coordinate system tool proj4, latitude longitude to easting northing, world coord sys tools.
1.29 Fixed bug with small negative lat/lon values in DMS and DM formats.
1.28 Changed app to follow the usual convention of showing latitude before longitude.
1.27 Fixed issue with keyboard popping up on main page and IGRF page.
1.26 Allow entry of years up to and including 2020 in IGRF tool.
1.25 Updated the IGRF tool to use the IGRF-12 model which is valid until 2020.
1.24 Added IGRF tool (it used to be a separate app).
1.23 Added a link to the online help from the help dialog within the app.