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Title
The 3rd ISPRS Workshop on Dynamic and Multi-Dimensional GIS & the 10th Annual Conference of CPGIS on Geoinformatics
Author
Chen, Jun

ISPRS, Vol.34, Part 2W2, “Dynamic and Multi-Dimensional GIS", Bangkok, May 23-25, 2001
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Being the basic platform of spatial data management, GIS has
rich functions as data collection, storage, output, distributing,
thematic map-making and spatial query. Combining with the
application of urban water supply industry, to use the basic
functions of GIS may enhance the pipeline management ability
of Water Supply Department to a great extent. At first, the flow
pipe and its topographic information in addition with the
attribute information are stored in disc, hard disk or magnetic
disk as the digital format, which will avoid loss of fundamental
materials and precision caused by using paper medium and
enhance the data utilization ratio. Secondly, use GPS and RS
to re-survey or survey the newly constructed valves, update
GIS data and guarantee the data actualization in the quickest
time. At the same, GIS can output pipeline maps of any scale
and range according to the requirements at any moment for the
constructors. Thirdly, by using GIS, the quantity functional
operations of Water Supply Industry may be accomplished or
reduced automatically, such as copying water meter
automatically, making pipe bursting analysis and managing
valves, so that the man-made errors may be reduced. The
efficiency of working and accident processing is increased,
which has decreased the resource waste greatly. For instance,
the Valve Real Time Dynamic Management System used by
Guangzhou Water Supply Department can load graphics to be
processed by various means, report and repair the damaged
valves, analyze pipe bursting areas promptly, search valves to
be regulated and draw real-location banding point maps of the
valves. It has provided constructors with the maximal amount
of information to deal with the pipe bursting matters.(Fig.2)
Fig.2: Valve Real Time Dynamic Management System
Though the basic duct system map has reflected the
relationship between valves and pipelines and their distributed
status definitely, it cannot represent the relationship among
valves, pipelines and features on the ground (such as buildings,
roads, canals and lampposts) clearly. In order to represent the
distributing status of underground duct system and other
features visually and improve the utilization ratio of basic
pipeline maps, large-scale topographic databases (1:500,
1:1000, 1:2000) can be established as the background for the
flow pipes. Or directly establish large-scale topographic map
graphics databases or aerial image databases as the
background, combining with the basic pipeline map, which will
make GIS represents the pipeline distribution more visually and
more easily to understand, operate, plan and construct when
managing underground duct system.
4. CONSTRUCT BY STAGES, ADVANCE STEP BY STEP
It is in fact a reform to transit the traditional management mode
to the modern mode. If it is eager for quick success, haste will
make waste, so that enormous waste of human power, material
resources and financial power will be made in the process of
construction. In order to guarantee that the Water Supply
Department of each city will successfully make the managerial
shift and reduce the waste of human power, material resources
and financial power in the transmission process, the whole
procedure should be implemented by stages according to the
real situation of each department.
Guangzhou Water Supply Department has a long history. The
fundamental materials of its duct system have distorted a lot
with a bad precision, which is hard to bring its function into full
play. In order to realize the digital managerial mode towards the
duct system, directors of the company divide the construction
into six steps considering both the temporary situation and the
development.
1. Take the current pipeline topographic map of the valves as
the reference, make a draft for the valve pipelines sketch
map of the seven branches.
2. Take the draft as a test, establish a Valve Real Time
Dynamic Management System to realize the basic
functions of the valve pipelines management.
3. Sum up the development and application experiences of
the Valve Real Time Dynamic Management System, make
sure the display format of basic data and attribute data and
functions the system need to add.
4. Take one branch institute as the test, referencing for the