[OSM-newbies] GPS settings

[Randy]

Iván Sánchez Ortega wrote:

>El Miércoles, 20 de Enero de 2010, H.S.Rai escribió:
>>Would like I clarify about settings on GPS to be used with OSM.
>>
>>Map Datum: WSG 84 (Many options)
>
>Unless you know what "map datum" means, use WGS84.
>
>If for any reason you want your GPS to display other datum (for example, to
>compare coordinates against a paper map that uses a national grid), be 
>aware
>that there is software capable of converting the GPS tracklogs later.
>
>>North ref:  True (other options Mag / GRID / USER)
>
>This changes the way your GPS unit displays the "north" arrow. Again, 
>changing
>it may be useful if you use paper maps that use the magnetic north, or are
>grid-based.
>
>Otherwise, it doesn't matter much. The default ("True north") means that 
>the
>north arrow points to the geodetic north, i.e. the point with latitude 
>90º.

The main thing is to make sure that you have your GPS set so that it won't 
"warp" your measured position to match the internal map. That may not only 
cause your data to be off, but may cause you to derive information from 
copyrighted map data.

-- 
Randy