Text 14781, 47 rader
Skriven 2008-05-02 14:49:26 av mark lewis (1:3634/12.0)
  Kommentar till text 14776 av Roy Witt (1:397/22)
Ärende: Google Earth
====================
 ml>> DMS coords: 59ø19'58.04" N 18ø03'52.16" E
 ml>> DEC coords: 59.332789      18.064489

 ml>> much much much difference between them ;)

 BF>> Not if you only look at the value of the figures.

 ml> hunh?

 RW> I don't think he grasps the difference and how to get there from
 RW> here. He takes the DMS number and puts a decimal point after the
 RW> degrees and then inserts the minutes and seconds after. Which to
 RW> him converts it to a DEC number.

you might be right... i'm aware of numerous map coordinate systems that are in
active use each and every day... for example, all of the following represent
the exact same spot on the map... 

DMS  : Lat 59ø19'58.04"N  Lon 18ø03'52.16"E
Dd   : Lat 59.332789N     Lon 18.064489E
DMd  : Lat 59ø19.9673N    Lon 18ø03.8693E
UTM  : 34 V 21 6580789.975 Northing  333013.3816Easting
MGRS : 34 V CL 80789 Northing  33013 Easting
MhGS : JO99ah  (Jay Oh Nine Nine A Ach {ch as in choose})

DMS  = Degrees Minutes Seconds
Dd   = Degrees in decimal
DMd  = Degrees Minutes in decimal
UTM  = Universal Transverse Mercator
MGRS = Military Grid Reference System
MhGS = Maidenhaed Grid System aka QTH Locator aka WWL (World Wide Locator)

the MhGS/QTH/WWL system is used by HAMs and other radio operators... it is
named for the town outside of London where it was first conceived during a 1980
meeting of European VHF operators ;)

in the MhGS, each grid square is 1øLat by 2øLon (aprox 70mi x 100mi)... the
first two letters are the "field"... the two numbers are the "square"... the
final two letters are a finer grid break down within the current grid square...
this finer grid has each of its squares measuring 2.5 min Lat by 5 min Lon
which is roughly a 3mi x 4mi square...

contrast the MhGS with the UTM system which uses grid squares of 1km x 1km ;)

)\/(ark

 * Origin:  (1:3634/12)