survey marker
object placed to mark a point
geodetic station
permanent marker for use in geodesy
Henry Washington Survey Marker
survey marker in San Bernardino County, California
Zero Obelisk
survey marker on the east bank of the Warrego River
Wild Goose Pass Tree
tree used as a survey marker in Washington state, USA
meridian marker
marker for a meridian
Haddon Corner
north-eastern corner of South Australia, where it meets with the border of Queensland
Meades Ranch Triangulation Station
the geodetic base point for North American Datum coordinates