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9
GIS Data Logging Functions
Feature Libraries
Feature libraries contain lists of features that you should be
visiting during your field sessions.
Features are four types:
- Point feature: The geometrical representation of this fea-
ture is a point. Logging this type of feature requires static
occupation at the point.
- Line feature: The geometrical representation of this fea-
ture is a line. Logging this type of feature requires that
you move along this line.
- Area feature: The geometrical representation of this fea-
ture is an area. Logging this type of feature requires that
you move along its contour or you make several static
occupations if it is a regular area (with straight sides).
- Grid feature: The geometrical representation of this fea-
ture is an array of evenly-distributed waypoints.
MobileMapper will guide you to each of these waypoints
where you should enter a measurement performed at this
point.
Each feature also has a number of attributes. There are three
categories of attributes:
- Menu style where the attribute values are words or
phrases that you pick off a list (e.g. Condition attribute
opposite)
- Numeric style where you select a number within a speci-
fied range (e.g. # of Bulbs attribute opposite)
- Text style where you type in a note that can contain both
numbers and letters (e.g. Closest Street Address attribute
opposite)
You can input as many as five feature libraries into Mo-
bileMapper. Just remember that you can use only one feature
library for logging data to an individual job.
A feature library is a
hierarchical structure
that guides you through
the description process
so you know you will
describe thoroughly and
quickly each feature you
visit. You will not have to
remember what
attributes of each feature
you should record: the
feature library will tell
you!
Example of a “stree-
tlight” point feature, as
may be described in a
feature library
Feature libraries are cre-
ated using the Feature
Library Editor module in
MobileMapper Office.
Condition
# of bulbs
Closest
Address
List Attribute
values
of streetlight
- Good
- Needs repair
- Needs paint
Enter
Type in
numeric value
Street
address
attributes