— 
AD 
At the national level, that is in general ihe Ministry of Housing r 
and Physical Planning and in particular the National Physical Planning NA 
Agency. Alongside this, a few departments are responsible for issues PF 
which may have implications for physical planning policy (e.g. care for Ec 
national monuments). These departments also were contacted. NC 
Le 
At the provincial level, physical planning is principally in the SU 
hands of the Provincial Physical Planning Agency. Two other institutions, L— 
the Provincial Transport and Water Administration and the decentralised TC 
Housing Directorate also exercise some influence in an executive sense in L 
physical planning matters. These bodies were also approached. Fi 
At the local level, 20 local authorities were contacted — with one 
exception they were local authorities wiih more than 50,000 inhabitants — — 1 
together with 35 non-governmental organisations. These 35 were included 1 
because they all took part in the aboæ mentioned ITC seminar and therefore -1 
were excepted to react positively. C 
c 
Tne two largest suppliers were also asked about their activities 1 
to gain further insight into the supply side. C 
The guestionnaire was in fact fairly straightforward and was concerned 1 
with the availability of aerial photographs since 1970, the sort of mate- 
rial used (including obliques), questions about the scale and scope of 
Yhe coverage, and last bue-noi least the overall object of use. ph 
ihe 
In total 97 addresses were contacted; in 54 cases the questionnaire 
was answered. Statistically, this is perhaps not such a high response, 
but nevertheless suffucient for the overall objective, that is to obtain Nl 
better insight into the use of aerial photography in physical planning in [o 
the Netherlands. Bl 
In the table below, the response is classified in the different catego- 0] 
ries. C. 
c 
L.—