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Accessing Geoenvironmental Data: From On-line to Expert Systems
4
"GSC": THE GEOGRAPHICAL STRUCTURE
CATALOGUE
Most geographical phenomena have their structure completely designed and now
belong to a catalogue, the GSC; they thus can be re-used for any new application,
partially or as a whole; two structures, or more, can be assembled to provide a new
one. Time and brain are then minimal for any new problem. We briefly give here
a non-exhaustive list of the only urban phenomena whose structures belong to the
GSC:
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ways (segments, crossing, blocks, and block-faces), composing the
urban texture, pavement, sidewalks, gutter, administrative boundaries,
electrical networks (very high-, high-, medium-, low-voltage),
water networks (domestic water, industrial water, fire network), heating
(hot water and vapour), conditioning (cold water), compressed air,
gas, pipelines, various other gases such as nitrogen, argon, etc .... , grease,
various telecommunication networks, lightning, traffic regulation and
video control,
transportation (trains, metroliner, bus, taxi, tramways, etc.),
sewers,
etc.
Some essential factories have their structures too (generally using networks), such
as:
• railway and train stations,
• airports,
• harbors,
• gas-works and oil-refineries,
damps, electricity production (hydro-, thermal, or nuclear),
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etc.
For that purpose, prototypes (Bouille, 1993a) have been developed, such as
"GRAPH", "NETWORK", "POLYHEDRON", etc ... allowing a fast and easy design
of any new geographical theme. Many other networks have been processed,
concerning land planning, and not only urban. The most important structures for
a country have also been designed, most of them using the prototype "network":
• geology, mining and hydrocarbon production and distribution,
• topography, hydrology,
• pedology, vegetation, agriculture,
• health, education,
defence ...
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