| IGIS
glossary
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| Class: group
of elements (e.g.: ports, airports, water projects, etc.). All elements belonging to a class have the same
structure and the same general propreties. Class data is organised with a
database typical structure: tables and variables. |
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Type of class (or
features, or lavels or layers):
- Active
Class: class than can be
edited and modified by the user
- Reference
class:
class protected against any kind of modification (lecture class).
- Frozen
class: active class just displayed in maps. The user cannot get
data from them.
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Thematic level:
level that is
authomatically generated assigning graphic propreties to elements of a
predefined class. Once the level is created, it can be saved as a new
class of objects to be integrated in the configurations. The elements
that shape a thematic level mantain always by default the same comun
graphic propreties from their original class.
The utilities of mapping thematic levels unable the user to represent
graphically transport networks and transport oriented maps (e.x.
traffic flows, hinterlands) and other conventional maps (bars,
figures, labels).
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| Configuration: map.
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| Element:
feature
object belonging to a class (the port of Antwerp in the ports class)
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CAD: Element
without data attached and without network topology.
GIS: Elements
with data attached but without network topology.
NIS: Elements
with data attached and network topology.
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| Element code: variable used to identify the element
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| Graph: specific database structure where the elements have only binary
relations and are linked in pairs (two and only two nodes make a link). |
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| Group:
joint of elements
selected independently from their class.
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| Legend: list of active classes that configurate a map.
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| Map: particular
selection and graphic representation of classes (CAD, GIS
and NIS) with their graphic propreties (colourr, thikness, symbol, etc.).
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| Metadata of
variables and tables:
it contains data of
variables (ex: type (numerical, character), information source, year,
unit) and data referred to tables (ex: source). |
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| Nuts:
administrative territorial division (0: Country, 1: Macroregion, 2:
Region, 3: Province) |
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| Query:
logic
sentence defined to select elements that share same predefined
characteristics. It is formulated using arithmetic and logic conditions
(SQL standard language) on variables of a given table. |
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| Shortest
path: group
of archs that form an itinerary accordint to minimum time, distance or
cost conditions. |
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| Table: database
structure of a class that contains information organised according to
variables (columns) and registres or number of elements of a class (rows).
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| Tree
: calculation
of a group of archs that form a group of itineraries from one or more
origin nodes to several destination nodes.
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| Variable:
ordenated vector that contains a value for
each element of the database. They can be descriptives (ex: heavy goods
vehicles capacity), index (ex: medium capacity of heavy goods vehicles) or
indicadors (ex: efficency of heavy goods vehicles), and they can have different
formats: numerical (integers, long doble, byte), character (text), boolean and
data. |
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| View:
geographiclal portion of a map.
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| Window: restrictied zone of a a computer screen managed by Microsoft Windows O.S.
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