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In the Field 5
when driving along a road recording power poles using
quickmarks. You can specify an offset of ‘3.5 m to the right’, so
that the poles are positioned 3.5 m to the right of your direction
of travel. This is an example of collecting offset quickmark
features.
when collecting road centerlines. It is generally easier (and
safer) to specify an offset of ‘2 m to the left’ than to actually
drive along the center line, especially in the case of a highway
with a central dividing strip. This is an example of collecting
offset line features.
when collecting a building as an area feature. It is generally
easier to ensure GPS coverage by walking around the building
at a distance of 5 m from the building, and to specify an offset
of ‘5 m to the right’ (if you walk clockwise around the
building), so that in your GIS the outline of the building is
accurately recorded. This is an example of an offset area
feature.
TheO softkey provides access to the offset entry form for the
feature you are currently in. An offset for a point feature consists of a
bearing (an angle from either true or magnetic north), a range (slope
distance), and an inclination (angle above or below the horizon), as
illustrated below:
TSC1 Asset Surveyor Operation Manual 87