I have a graticule overlaid on my layout and I've chosen to set the coordinate display format as degrees decimal minutes (DDM). I have a graticule 'interval' set for half a minute (0°0.5') for the grid lines, the tick marks, and the labels.
Am I wrong to expect the labels to display nice rounded lat/longs at the half-minute, like:
46°1.5'
46°2.0'
46°2.5'
46°3.0'
46°3.5'
etc...
Why are they set at such close-but-not-quite intervals?
I tried changing the map frame coordinate system to WGS Auxiliary Sphere, changing the map units to DDM, etc., but nothing seemed to resolve the issue. I also tried changing the graticule format to decimal degrees and that resulted in similar labels. If I set the graticule to use degrees minutes seconds, then the labels show with nice rounded seconds (either 0" or 30", as expected).
I assume this is something simple that I'm overlooking. As you might imagine, I can't send a map like this out and expect anyone to make use of the graticule.
