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extraction but practical solutions are still some way off.
Database integrity after update is now attracting serious
attention, being helped in practice by the use of the best
tools and the best possible imagery as an aid to
interpretation. — The likely availability of so-called high
resolution satellite imagery in the near future will provoke
further controversy on just how good the image must be
for effective and reliable work, but for large scale
applications the low-flying aircraft will surely remain the
vehicle of choice and will still be assisted by the surveyor
on the ground. This Congress and the next session from
1996 to 2000 should disclose interesting developments in
this very important practical subject.
Finally, because of the present “horizontal” ISPRS
Commission structure (layers of activity from initial data
capture onwards), those who are interested in a
particular “vertical” theme (for example the whole of
topographic mapping from sensor to user) need to be
involved in the affairs of almost all of the Commissions.
It is certain that many papers of interest to participants in
this Working Group and worthy of inclusion in our
sessions will have been submitted to other Groups,
especially in Commissions Il and Ill. | intend to join in
such sessions where the Congress Programme permits,
and | urge my Working Group members to do the same.
Such cross-fertilisation among the present Commissions
is an imperative for sensible progress in our discipline.
This may also eventually persuade ISPRS to adopt a
more logical “vertical” Commission structure for the
organisation in the years to come.
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996
