Geoinformation for Disaster and Risk Management - ISPRS

Check for compliance with risk regulation
When the available Topographic Land Map and the
housing data from the RAND were combined, it was
possible to map all settlements within two
kilometres of the coastline. A limited number of
inspection sites were selected, where it was possible
to collect field data including the use of a handheld
Global Positioning System (GPS) to ensure positional
accuracy. To be able to provide a benchmark,
inspection sites were selected from various
implementing agencies. To ascertain if newly
constructed houses complied with government
regulations, it is a straightforward process to simply
map the distance from the coast. As can be seen from
Figure 4, some of the houses were constructed
within 300 metres of the coastline. We can also see
from this example that houses built by NGOs are
located even closer to the coastline.
Lessons learned
From the housing audit in Aceh Indonesia, it is clear
that many limitations exist concerning the
availability of data. Data required for the audit do not
exist or are not provided by the auditee. The
combined use of GIS and remote sensing could help
in resolving this problem. Data accuracy and
methods to assess the accuracy of spatial (audit)
data still require more attention. As with all data
used by an audit institute, reliability of the data used
in the audit is important for its credibility and the
confidence of the general public.
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Figure 3: Sketching of housing projects by field team