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| “A landmark
decision but it misses the seamark” |
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Muneendra
Kumar, Ph.D.
Dr. and Senor “WGS 84”, Consulted
to 100+ countries around the World.
munismk@yahoo.com |
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The
only thing new is introduction of DSMs and OSMs.
It is surprising that Indian geodesists, cartographers,
and other experts have “guided” the
Government to retain the 19th century, mix it
with 20th, and introduce the incompatibles. And,
all this is to start the 21st century!
Thus, here are a few innovative observations for
the record. |
| For DSMs – |
1. The
“Everest/WGS 84” is not a valid “datum”.
Does it mean that Indian geodesists are to define
WGS 84 all over again with the Everest ellipsoid?
2. In general, the 1: 25, 000 and 1: 50,000 are
the two scales
for topographic maps. Thus, two incompatible projections
and the associated grids will be an operational
nightmare for the war fighters.
3. It is also not clear that contours will be
in which height system. The old heights will be
in conflict with GPS.
4. Having full information about the definition
problem in WGS 84, Indian geodesists should have
worked for a 21st century accurate and correctly
defined Indian Geodetic Reference System (IGRF)
2005. It would also be easy to enhance the accuracy
of IGRF, as and when India requires. 5. This series
for the whole country should only be for selected
areas.To maintain two overlapping series is practically
unrealistic. |
| For OSMs – |
1. The
right and timely choice for the horizontal datum
would be the new Indian Geodetic Reference System
2005.
2. When a new 21st century mapping system with
zero distortion is available, India has a better
choice over a 16th century projection with distortion. |
| For Charts – |
1. The
policy does not “cover” the nautical
and aeronautical charts. No-projection, seamless,
and distortion less charting is available.
2. For safe navigation, new technique to survey
time-invariant sea floor depths provides a 21st
century system than the most ambiguous LAT datum.
In the 21st century, India deserves the Best and
that is achievable only with new research, ideas,
techniques, and innovation. |
| “The civil maps
seem to have the needed features” |
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Prof
J G Krishnayya
Director, Systems Research Institute, Pune
geoconcept@vsnl.com |
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The
National Map Policy is a major positive step forward.
I note that Contours have been included in the
Open Maps to be sold tothe public. This is a great
relief. I cannot say anything about the Military
maps as I do not know much about their needs.
The Civil (“open”) maps seem to have
the needed features. The fact that City maps at
high resolution will also be “open”
is all to the good. It is also good to leave the
restriction-of-mapobjects issue to the SoI, so
that once the maps come into the public domain,
we do not have to worry about anything which is
depicted thereon.
I also note that people who procure the maps from
the SoI are at liberty to provide value-added
additions and to resell. That is a major step
forward. However, I note that a (typically Indian)
bureaucratic interpolation was made in the Policy
statement requiring registration of each purchase
when one buys the map – and also when one
resells the map. This does not really seem to
provide any REAL safeguards (what are we now safeguarding
in regard to the “open” maps?), and
I hope it will eventually be dropped by the Ministry
as they implement the system of map-distribution.
With the exception of the above requirement, I
can only welcome the statement of Policy, and
express my hope that the (unspoken, unfortunately)
objective of the whole policy - namely a much
more rapid rate of utilisation of the maps aimed
at economic growth and more efficient land-use
and planning and investment decisions –
is achieved. |
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