In the surroundings of Aartrijke (fig. 11) an in-
dication of an urnfield, (A) a burial place of the
Iron time, (1100 Bc) is visible.
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Fig.11. Oblique aerial photograph of the area of
Aartrijke (J.SEMEY).
One year later, the same area was observed from
the air (fig.12), but from an other viewpoint.
Fig. 12. Oblique aerial photograph of the area of
Aartrijke (one year later) (J.SEMEY).
Not only the urnfield is appearing (A) but also a
number of rounded burial-places of the Bronze Age
(A) (1500-1100 BC.).
The observation of these two images learns that
these traces appears only under specific conditions
of soil and vegetation. These images show also a
remarkable continuity of the occupation but also
that the population density in this area was much
higher than be tought before.
3.2.3. A following example (fig. 13) shows a very
complex situation.
Fig. 13. Oblique aerial photograph of Assenede
(J.SEMEY).
The curved lines (A) are testifying of the chan-
nels or creeks passing trough the area during the
floodings.
The concordant design of the fields is recent but
the discordant field parcels are referring to an
older system.
A corner of a site surrounded by a large ditch can
be seen. It is an indication of a mediaeval :farm-
stead (B). On top of the site a trace of a former
well or watering place (c) is clearly visible.
In the under left part of the image traces can be
observed of a double ditch system forming the
enclosure of an old settlement (D). perhaps dating
from the Iron Age.
At theupper rightpart of the image black spots
occur referring also to a settlement from the Iron
Age.
A last example (fig. 14) is given by an oblique
aerial photograph of Sint-Laureins situated in
the Northern part of Flanders.
One can see clearly the design of the creeks for-
med during a catastrophic flooding happening in the
year 1390.
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