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What is a Geographic Information System (GIS)? |
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Simply speaking, Geographic Information System is nothing but a
computerized database attached with a computerized map. The map is in
electronic format, where it can be scaled up and down as per your
requirement and the database is attached to each referenced location of
the map.
It is, therefore, considered better than a typical computerized
information system. When data is available on a map it becomes much
user-friendlier and easily comprehensible. For the technical minded
fellows, click here for some technical definitions of GIS. |
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The Data
Capture Process |
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If the data to be used are not already in digital
form, that is, in a form the computer can recognize, various
techniques can capture the data. Electronic scanning devices convert
paper maps to digital format.
Digitized maps can then be vectorized to collect the coordinates of
features.
Putting the information into the system - is the most
time-consuming component of GIS work. Identities of the objects
on the map must be specified, as well as their spatial
relationships.
How it has been done?
You may want to know how the maps of the different types as you see
in this site were captured?
Here are descriptions of some of the steps in the intricate, complex
and highly technical process: |
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 Scanning |
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High resolution scanners have been used for
scanning Maps. Scanning is a common process for conversion of paper
maps into digital formats. |
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Vectorisation |
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During Vectorisation, all the features have been
stored in terms of points and lines. Different layers have been
generated for different features of the map such as Roads, Land
Parcels, Block Boundary etc. Attributes like Block Names, Land
Parcel ID Numbers and objects were also captured for linking with
the database. |
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Integration
with the Database |
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The Data being displayed now by this site has
been collected from extensive field survey, organized into a
database and then integrated with the GIS ready Maps. Therefore it
was very important for us to ensure that the database was planned
carefully to avoid redundancy. |
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Publishing
the maps on the net |
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Riddhi’s unique WhizMap technology was then
used to publish the GIS ready map on the web, as you see in this
site now. |
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