International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004
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Figure 3. Architecture of the protection forest management
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The main goal of the system was to provide the management
authority of the protection forests a tool to quickly access
information relevant to these forestlands, such that the forest
managers can manage the forests more effectively. Moreover, a
web-based GIS was established to provide the general public
with functionality to access the location and status of the
protection forests. The system architecture of the web-based
GIS is shown in Figure 4.
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Figure 4. System architecture of the web-based GIS
4. RESULTS AND DISCUSSION
4.1 Results of revision
4.1.1 Update of cadastral records: The protection forests
are in urban environment, therefore are greatly affected by
urban expansion in the Taipei City area during the past few
decades. Since established in 1907, the forestland of the
protection forests had gone through changes such as merging,
subdivision, administrative boundary changes, land transfer,
and resurvey, however the relevant records did not reflect all the
changes. This study collected detail land information about the
protection forests, and carefully compared all the corresponding
records of different years and sources. Discrepancies and
redundancies found in the records were verified and corrected
to ensure accuracy of the information.
In addition, a database management system was developed to
facilitate inquiry and maintenance of these records. The
software, developed in Microsoft Visual Basic, provided
friendly graphical user interface and ease of use for the forest
managers.
4.1.2 Update of protection forest maps: Without accurate
and up-to-date information about the status of the resource and
environment, it is not possible for a country’s government and
people to make best use of the land and natural wealth, or to
prevent its misuse. (Dale and McLaughlin, 1988). To reflect the
current status of the protection forests, this study created new
maps in digital format. The forestland boundaries were carefully
checked to ensure alignment with the cadastral maps. Figure §
and Figure 6 depict the maps of protection forests before and
after revision, respectively. Comparison of these two maps and
corresponding cadastral records indicate that the area of
protection forest increases from 2,349 hectares to 2,539 hectares
after revision. The difference in area was mainly because of the
adjustment of administrative boundaries.
In addition to the protection forest maps, this study also created
a variety of different maps, which included land-use map,
location map of sample plots, map of control points,
topographic maps, and map of contour lines. All the maps were
in ARC/INFO coverage or grid format, or ArcView shapefile
format.
Figure 6. Protection forests map after revision
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