Simple Python Field Calculator ex, converting degrees minutes & seconds to decimal

MichaelMiller2

Afternoon all,

I'm trying to use the field calculator (Python parser) to convert a field of degrees/minutes/seconds(DMS) to decimal degrees.  The DMS field (latTemp) is formatted as such; 463704, 462331, etc. I'm trying to apply to the calculation to a decimal field (Latdecimal).

Pre-Logic code:

def lat(dms)     deg = !latTemp![0:2]     min = !latTemp![2:4]     sec = !latTemp![4:6]     dms = deg + (min / 60) + (sec / 3600)     return dms

Expression:

lat( !latTemp!)

I'm relatively new to python and am confused at this point.

Thanks for suggestions.

MathewCoyle

Ah yes you'll need to manipulate the types a little. You are trying to do both string and math operations on the same data.

def lat( dms ):     deg = float(str(dms)[0:2])     min = float(str(dms)[2:4])     sec = float(str(dms)[4:6])     dd = deg + (min / 60) + (sec / 3600)     return dd