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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | Re: GISList: GIS/SCADA - Case Study |
| Date: |
08/08/2002 02:29:36 AM |
| From: |
GS.Rao .. lntinfotech.com |
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Anthony,
About a year ago we implemented a GIS - SCADA interface for the Water
Supply
Division of the Bombay Municipal Corporation.
Project Brief:
The BMC installed 7 instruments in each of its 20 or so reservoirs spread
all over Mumbai (nee Bombay).
The instruments measured parameters like, turbidity, residual chlorine, pH,
inlet flow pressure
and so on. These were linked to Remote Telemetry Units. These RTUs
transmitted the parameter
values by means of VSAT to a central server.
A SCADA system, installed in the central server, received the data stream.
The parameters were stored in the SCADA database with appropriate time/date
stamp,
instrument ID no etc. The SCADA system was programmed to issue alert
messages
if the parameters went above or below predefined thresholds. The pipeline
network
was displayed in the form of a schematic.
The water supply engineers expressed a desire to have a "real" view of
the pipeline network We digitized several existing paper drawings of the
network, and "stitched" them into one composite. A GPS survey was
undertaken of
critical points (valves, all reservoirs, some prominent street
intersections etc.).
These ground control points were used to "correct" the composite and create
a
highly accurate digital vector map of the pipeline network.
(Aside: The above paragraph is a highly simplified, distilled down version
of
what grew into an excrutiatingly agonizing, hair-raising,
banging-against-wall process.)
The data from the SCADA database is "pulled" into the GIS database and the
engineers view it on the GIS frontend. Needless to say, all the linkages
between
graphic entities and database had to be built using the proverbial
"UniqueID".
As of now it is mostly a "query and view" usage of the GIS interface. With
time,
it will be used for some simulations and "what if?" type of analysis.
As of now the SCADA system is a "measurements reporting" tool. On an
experimental basis, one reservoir is actually being remotely controlled by
the
SCADA system (opening and closing of valves). The ultimate plan is to
extend this remote control to all reservoirs.
Regards
Dr. G. S. Rao
Asst Gen Manager - GIS
L&T Infotech Ltd., Mumbai, India
I'm looking for information on SCADA, anyone have recommendations on
websites, industry groups, particular companies, specialized job/resume
boards, etc. Basically, anything to do with the technology/industry,
particularly as it involves GIS in some form. Thanks in advance.
Anthony
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