Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 232)

232 8. Coding Technical Reference Manual-4.0.0en
8. Coding
There are two types of Coding
System available on System 500 -
Thematical Coding and Free Coding.
Thematical Codes are point-based
information recorded together with the
other point information.
Free Codes are time-based
information, independent of the
points. A time stamp is recorded with
each free code, allowing the
subsequent export of points and
codes in chronological order. This
information can then be used in third-
party mapping software.
8.1 Thematical Coding
Thematical Coding is point-based
information recorded at the point you
are occupying. Thematical Codelists
consist of Layers, Codes and
Attributes.
The Layer is the primary block of the
codelist and describes a group of
related codes. For example, the Layer
Vegetation could describe the Codes
Tree, Grass, Shrub etc.
The Code is the secondary block and
usually describes a single object.
A Code may have one or more
Attributes attached to it. Attributes
describe properties of the Code. For
example, the Code Tree could have
the Attributes Type, Height, Age,
Girth, Spread etc.
Although it is possible to create a
new, empty Codelist on the Receiver
and then create new Layers, Codes
and it is far more practical to create
the complete Codelist in SKI-Pro
Codelist Manager and upload it to the
Receiver.