Determine latitude/longitude of a specific point

Click on the point for which you want latitude/longitude.
A marker will be created at that point.
Click on the marker to see an info window containing lat/lng.
Zoom in before your first click to precisely place your point.
Click on the X in the info window to delete the marker.
Zoom in or out using + and - boxes at left.
Drag map to move the map.
Double-click to re-center the map.

The lat/lng is expressed in decimal degrees.
The negative longitude indicates WEST.