Eeuwfeest IHO
In 2019 bestaat de Internationale Hydro
grafische Organisatie (IHO) 100 jaar. Tijdens
de festiviteiten staat de ontwikkeling van het
vakgebied de afgelopen eeuw centraal. Het
hoogtepunt wordt een workshop op 20 en 21
juni 2019 in het Oceanografisch museum van
Monaco, getiteld "A Historical Approach for
Measurements and Protection of Oceans and
World Waters". De workshop wordt georgani
seerd in samenwerking met de Piri Reis Uni
versiteit (Turkije). Abstracts voor presentaties
zijn welkom tot en met 21 november 2018.
Meer informatie en een overzicht van alle acti
viteiten is beschikbaar in IHO Circular Letter
32/2018. Ga naar www.iho.int, kies Letters
Documents, vervolgens 2018, en tot slot CL32.
(Thijs Ligteringen)
Geodesy goodbye
Roel Nicolai has stepped down from the
Geomatics Committee's Geodesy
Subcommittee - more than 20 years after
having joined its preceding Working Group.
Throughout, Roel has "stood out as a man
of vision and technical aptitude," says
Subcommittee Chairman, Roger Lott.
"During his time on the Subcommittee Roel
has been instrumental in the data modelling
of the Geomatics Committee's flagship
EPSG Geodetic Parameter Dataset
(www.epsg.org). He led its migration to the
webbased platform at www.epsgregistry.
org. Roel also edited early versions of the
P1 and P2 seismic navigation data formats,
in which he created terms that have entered
into international mathematical literature".
So committed has Roel been to Geodesy
(the science of measuring and under
standing the earth's geometric shape, its
orientation in space and its gravity field - as
well as the changes of these properties with
time), that he remained on the
Subcommittee for a full year after retiring
from Shell.
Roel's final contribution to IOGP's Geodesy
Subcommittee work has been his editorship
of the highly complex new Geomatics
IJssellinie
'De Russen waren tot in detail op de hoogte. In
de bunker hangt een ingelijst fragment van een
stafkaart die werd gebruikt op de Oostblok-
hoofdkwartieren: de IJssellinie staat er precies
op ingetekend. Spionage was aan de orde van
de dag, maar misschien zijn de plannen wel
bewust gelekt, om de vijand te ontmoedigen.'
(EO-gids Visie, 7-20 juli 2018, p. 39, zie ook
www.ijssellinie.info)
Guidance Note 373-25 on dynamic
coordinate reference systems - coordinates
of points in these systems change with time.
An example of the dynamic coordinate
reference system is WGS 84 coordinate
reference system used for GPS satellite
navigation.
Even after his departure from IOGP, Roel
will continue with his passion. He will now
concentrate on chairing the Dutch Society
for the History of Geodesy and continue his
research into the history of portolan charts,
where he has demonstrated through the
application of geodetic principles that
academic theories for their origins are not
correct. Roel's challenges to conventional
wisdom will be missed by the Geodesy
Subcommittee, IOGP and the industry as a
whole. We wish him well in his 'retirement'.
(IOGP: International Association of Oil
Gas Producers)
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2018-2 De Hollandse Cirkel
