Specifications

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The Feature Properties window provides the following infor-
mation:
• Feature name and geometry, number of points for lines
and areas only, measurement(s), user-settable Updated
field. Apart from the
Updated field, these are non-editable
properties.
The nature of the measurements performed is presented
below:
Length: MobileMapper Office determines the length of
a line feature in the same way used by the receiver: by
estimating the distance between successive points on
the line feature with the assumption that each point is
on a sphere of average Earth radius. The elevations of
the points are not factored into the equation. Thus the
software calculates the spherical distance rather than
the horizontal or slope distance between the succes
-
sive positions. The length of the line feature is the sum
of all these distances..
Perimeter: MobileMapper Office estimates the perime-
ter of an area feature in the same way it estimates the
length of line features.
Area of area features: MobileMapper Office determines
areas by estimating the area enclosed within point
locations recorded in the field with the assumption
that each point making up the feature is on a sphere of
average Earth radius. Thus the area is that of a curved,
not flat, feature.
• Observation data (non-editable): date/time, duration of
point logging.
• Current Position for the selected point (non-editable): lati-
tude, longitude, altitude, number of satellites used, PDOP
and correction type.