The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008 
Figure. 1 Graphical Land Register 
The required data for land valuation analysis were derived from 
thematic and topographical maps and from the other related 
textual records. Land parcel values were determined by the 
mathematical combination of weights assigned (Table 1). The 
contour maps were developed for assigning weights according 
to the relief. 
3.2.4 Buffering 
The property zoning of a specified distance around coverage 
features with constant width buffers could be generated with 
multiple rings for a set of coverage features based on each 
feature's attribute values for proximity analysis (roads, railroads 
and waterway access, distance to shopping, nearby nuisances, 
distance to medical and educational facilities etc.). For the 
multiple buffers, weights were assigned from in to out side of 
the feature in case of constructive factors and in reverse way in 
case of destructive factors. The resulting buffer zones formed 
polygonal areas that were either inside or outside the specified 
buffer distance from each feature (Fig.2). Then, the overlaps 
between the polygonal buffers were determined and extracted 
according to Boolean operators (AND/OR), thus 2D valuation 
maps, useful in the assessment process wear created with a good 
visualization (Fig.3). The summation of weights for each land 
parcel could be derived for land valuation and hence, taxation. 
Weight(w) 
w=10 
w=5 
w=0 
Site/location 
Urban 
Semi urban 
Rural 
Topography 
Flat 
Average slope 
Steep slope 
Soil Characteristics 
Best suitability 
Average suitability 
Unsuitability 
Total Floor Area 
>2500 
2500> and 500< 
500> 
No. of rooms by type 
>12 
12> and 4< 
4> 
Age of depreciation 
<10 
10< and 30> 
30< 
{Semi urban, Flat, Average Suitability, Total Floor Area=1750, 7 rooms, 12 years old} 
Weight of the land = (5+10+5+5+5+5) = 35 
Table 1 Weight Assignment 
•->*« " x tax« *«• *.*«« 
Figure. 2 Buffers generated based on transportation 
(Road Network-Brown), Educational Institutes (Red) 
and Health (Hospitals-Green) 
Figure. 3 Weighted overlaps after buffering 
4. CONCLUSION AND FUTURE WORK 
Value maps are powerful decision-making tools that illustrate 
the geography of property values over space and time in a way 
that most property professionals find intuitive, namely map 
form. Value maps illustrate the spatial distribution of property 
values. The functionality of an Integrated Graphical Buffering 
System means that a value map need not be a static display but 
can form part of a more analytical process. Problems in the past 
related to a lack of staff resources, the production of expensive 
paper maps and the complex calculations involved. And this 
System can manage data input, calculations and the presentation 
of the results. 
A comprehensive and reliable Land Taxation System is a 
primary requirement for a country. One of the potential benefits 
is greater efficiency through prevention of time wasting and 
duplication of work, hence cost-savings. The development of an 
Integrated Graphical buffering System is one approach to 
satisfying following needs.