GCPs. For the transformation, a linear transformation and
nearest-neighbour resampling approach were applied, and
the related RMS error was 0.26 pixel. In order to acquire
primary digital data, the buildings were digitized from
the georeferenced topographic map of 2000 using ArcGIS
system. The digitized buildings illustrated on top of the
topographic map are shown in Figure 3. Then, for each
building entity, the attributes such as address, built year, use,
condition, and storey number were entered. Moreover, the
area of every building was calculated and stored as a new
attribute within the database.
In order to analyse the changes occurred in between
2000 and 2008, it was necessary to update the created from
the topographic map, database. For this purpose, the image
obtained by the wavelet-based fusion has been used. For
the thorough registration of the GIS and RS data sets, the
coordinates of the fused image were transformed to the
coordinates of the digitized map using 12 ground GCPs.
For the transformation, a second-order transformation and
nearest-neighbour resampling approach were applied, and
the related RMS error was 0.82 pixel. Then, the digitized map
was overlain on top of the georeferenced fused image thus