Oziexplorer - Datum - Waypoints
Submitted: Wednesday, Mar 23, 2005 at 00:20
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Coolman
I have the Sunmap Topo maps for South East Queensland and the dirty weekends in SEQ book. I am trying to put in the waypoints from the book but they are out of alignment (high and to the left). I have checked the datums, Maps are GDA94 and the waypoints from the book are WGS84 which are pretty much the same so Oziexplorer should have handled the translation. I also tried the waypoint against the Natmap 250k Mosaic and seemed to have the same problem. Any other idea's on what to look for?
Reply By: The Explorer - Wednesday, Mar 23, 2005 at 01:12
Wednesday, Mar 23, 2005 at 01:12
Hello - a couple of traps - how are you entering waypoints? I assume manually.
If so the datum used is to a certain extent independent of the datum the map is calibrated in - the display datum (shown in middle, just above top of map) is the datum that will be used for waypoint entry unless you have selected "Datum of Loaded Map" - right click on the area over the display datum name to select option - so match this to the datum of the waypoints you are entering - which may or may not be the "datum of the loaded map" (in your case they are - if they weren’t you would have to select appropriate datum)
Other most common trap is entering wrong format - are the co-ords in metres (eg 345666 mE ) or in decimal degrees (eg 33.12345° S), degrees & minutes (eg 33° 45.59') or degrees, minutes & seconds (eg 33° 45' 35.4").
Some people often mistake
degrees & minutes (eg 33° 45.59').
for
degrees, minutes & seconds (eg 33° 45' 35.4").
so in error (using above example) would enter 59 for seconds when in fact it should be 35.4 (0.59x60).
You can change the format of the lat/long co-ord system by right clicking on the displayed co-ords (extreme left area just above map) to match the ones you are inputting.
Trust this helps
Cheers
Greg
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