GPS AREA MEASUREMENT Spanish
GPS Area Calculation

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

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

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Ok, it's all. Testing the projection. Enter manually a waypoint (WPT -> List) with coordinates longitude = 19.515 and latitude = 47.19 (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/

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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]]


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