gumby4000
03-27-2008, 06:28 PM
Hi. I'm working with data from St. Albert in Alberta, Canada, located at 53°38'10.24"N and 113°35'20.66"W.
Here is a sample of the data:
Location Coordinate X: 25463 Location Coordinate Y: 5942447
Location Coordinate X: 24558.6 Location Coordinate Y: 5944277
What format is this data? And is there a simple way to convert it to lat long?
Thanks,
Jim
lfdmike
03-28-2008, 08:49 AM
That data style is consistent with the UTM (Universal Transverse Mercator) format, which I am not all together very familiar with
What I can tell you, roughly, is that your 'Y' coordinate is your distance from the equator in meters, and your x coordinate is the rough distance from the AB/SK border
Eric Frost
03-28-2008, 08:55 AM
UTM would also include a zone... do you see a zone mentioned anyway with your data?
Eric
lfdmike
03-28-2008, 11:23 AM
The first thing you should do is ask the format of the data source, this will probably get you some helpful information, such as what the numbers mean and where 0,0 is.
If if as I presumed in the first post, the conversion is not too difficult. The Lat-Longs here will all be in decimal degree format
Lat = (zero point lat) + y / 111111
Long = (zero point long) + x /(111111 * cos(lat))
For the coordinates you supplied the 111111 * cos(Lat) is approximately 65878.911
But, I could be completely off base here on my theory...
This is why there are standards out there.
gumby4000
03-28-2008, 04:39 PM
Thanks, guys. Looks like I need more info from them. At least I know what I'm dealing with, though.
Eric Frost
03-28-2008, 04:50 PM
Hmm, though I'm not sure we answered the question about what kind of coordinates those are.. please let us know how it goes.
Eric