Specifications

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Press the down arrow to move the cursor to the next
field.
- Tap OK to return to the Logging screen. This writes the
offset into memory, but you can edit it later if you like
by going through the same process.
Note: Offsets to area features are applied in
MobileMapper Office and not in the receiver.
10.Logging GIS Data on a Preset Grid Feature
The ProMark3's Grid Mapping Utility is an easy way to
automatically set up a series of GPS waypoints to facilitate
the logging of data in an orthogonal grid.This utility
assures that you gather measurements made using field
sensors such as chemical detectors, depth sounders and
magnetometers at an evenly distributed set of locations.
This in turn assures the creation in your GIS of contour
maps with a prescribed density of data and without any
gaps that might force you to return to the field.
The Grid Mapping Utility deals with two different grid con-
cepts: grid features and grid points.
- Grid features are arrays of uniformly spaced waypoints
oriented in rows and columns
- Grid points are navigation features similar to way-
points.
Important Notice: Once you have logged a grid feature in a
job (assuming the selected feature library allows you to do
so), you cannot log any other feature type in the job, not
even another grid feature. Conversely, once you have
logged a point, line or area feature, you cannot log a grid
feature even though the feature library selected for the job
does initially include a grid feature type.
For this reason, you should collect your grid data in spe-
cific jobs.
To operate the grid map-
ping utility, you will need a
measurement device - any-
thing from a depth sounder
to a ruler, your own sense
of smell or your ability to
make visual observations.
You will also need a com-
pass.