GPSMeter PDA

EOV coordinates in GPSMeter PDA (for Hungary)

Much people wanted to know how setup the EOV coordinates in GPSMeter PDA. It's really very easy, follow these two steps:

1) Configure the projection. File -> Settings -> Tab Coord -> Other projections (press "Config" button). In the dialog choose a name (for instance, EOV / HD72) and the EPSG Code 23700

2) Configure the datum. File -> Settings -> Tab Datum and choose the datum "HUY HUNGARIAN DATUM 1972 Hungary"

Ok, it's all. Testing the projection. Enter manually a waypoint (WPT -> List) with coordinates longitude = 19.515º and latitude = 47.19º (in HD72). The expected projected values are X = 685348.641318 m and Y = 205175.730876 m. For more info, see http://spatialreference.org/ref/epsg/23700/

Note for advanced users. You can also define this projection manually, choosing the "Hotine Oblique Mercator" type and filling the parameters with help of this table (source http://spatialreference.org/ref/epsg/23700/html/)

PROJCS["HD72 / EOV",
    GEOGCS["HD72",

        DATUM["Hungarian_Datum_1972",
            SPHEROID["GRS 1967",6378160,298.247167427,
                AUTHORITY["EPSG","7036"]],

            AUTHORITY["EPSG","6237"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],

        UNIT["degree",0.01745329251994328,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4237"]],

    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    PROJECTION["Hotine_Oblique_Mercator"],

    PARAMETER["latitude_of_center",47.14439372222222],
    PARAMETER["longitude_of_center",19.04857177777778],
    PARAMETER["azimuth",90],

    PARAMETER["rectified_grid_angle",90],
    PARAMETER["scale_factor",0.99993],
    PARAMETER["false_easting",650000],

    PARAMETER["false_northing",200000],
    AUTHORITY["EPSG","23700"],
    AXIS["Y",EAST],

    AXIS["X",NORTH]]