Spectra Precision Survey Pro v4.9 - Manual (Page 86)

receiver. (The GPS receiver settings are configured on the Job > Settings > NMEA GPS page.)
Enable GeoLock: When checked, enables the GeoLock feature.
Use 3D GeoLock…: When checked, the GPS elevation will also be used to compute your location and adjust the
vertical angle of the total station accordingly. GPS is generally less precise vertically than horizontally so unless you
are using GeoLock while in very steep terrain, this item should remain unchecked.
Surface Scan
[Survey] [Surface Scan]
The Surface Scan screen takes advantage of a robotic, reflectorless total station to automatically take a sequence of
shots of a surface. PC software can then use the data to generate a 3-D raster image of the surface or a DTM surface
to compute volume information. Consult the User’s Manual for more information on performing a surface scan.
Select Type of Surface Scan: Select the type of surface scan to perform here. The option selected will determine how
you will define your perimeter and distance intervals.
Distance Grid:
[Point 1], [Point 2], [Point 3]: Are the point names that will be used when storing the upper-left, upper-right and
lower points that define the surface perimeter.
Note: If any points defining your perimeter already exist, the point names can be entered in these fields without re-
shooting them.
[Shoot 1] , [Shoot 2], [Shoot 3]: Shoots and stores the corresponding point.
Horizontal Distance Interval: The horizontal distance between each shot taken during the surface scan.
Vertical Distance Interval: The vertical distance between each shot taken during the surface scan.
Angle Grid:
[> HA/ZA] / [> Point]: Allows you to define the corners of your perimeter by taking a shot to measure the horizontal
and zenith angles to each corner (or enter them in by hand), or by selecting existing points from the current job,
respectively.
Horizontal Angle Interval: The horizontal angle that will be turned between each shot taken during the surface scan.
Vertical Angle Interval: The vertical angle that will be turned between each shot taken during the surface scan.
HR: The rod height, which should typically be set to zero since all shots taken are reflectorless (no rod).
[Show Outline]: This will cause the total station to scan the perimeter of the defined surface. This is useful to visually
check the perimeter of your surface when the laser pointer is activated on the total station.
[Show Unit]: This will cause the total station to scan a single horizontal/vertical interval. This is useful to visually
check your interval settings when the laser pointer is activated on the total station.
[Next >]: Opens Surface Scan Statistics screen.
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