I'm unable to find out a formula for converting 3tm coordinates to lat-lon? 3tm is a system used in Alberta alone, as far as I can tell. The city of Calgary uses that for its opendata, which is what I'm trying to process.
gdaltransform will work, I must've just missed you on irc. I assume that 3tm is the projection here:
to convert to WGS84 longitude/latitude:
gdaltransform -s_srs epsg:3776 -t_srs epsg:4326
Then type in your coordinates.