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The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part Bl. Beijing 2008 
technology, to form the high accuracy, the multi-information 
observation system to the Earth. 
As the main forest ecological environment space information 
gathering tool in the fine accurate forestry, the remote sensing 
technology can obtain real-time precise information of the 
application goal on the spot conveniently, promptly, accurately 
and completely, i.e. essential factor data about trees, animal, 
soil and hydrology, to realize the finer forest management and 
the management plan. The development of modem remote 
sensing technology, has provided the multi-level multi-sensor 
observation network and the information processing method for 
forest monitor, appraisal, management and operation, 
forestation design, which might cause the forestry production 
and the management and operation from the macro control to 
the microscopic adjustment, from the qualitative analysis to the 
quota decision-making, from the estimation of the forest whole 
quantity to the determination of forest part and even the 
automatic measurement of small spot, and use the result of 
monitor appraisal directly to the control of forest part, to reduce 
or the weaken the disadvantageous environmental factor to 
promote the sustainable development of forest. 
1.4 The Application of GIS Technology for Acquisition of 
Forest Resources Data 
(2) Resources geography spatial distribution. With GIS digital 
terrain model (DTM), digital elevation model (DEM), the 
terrain pattern, the slope position and the slope face model, we 
can display the level and the vertical distribution of resources. 
The use of grid data fusion, sub classification and the overlay 
of vector chart, operations and region and adjacent sides 
analysis, can produce maps to display geographical information 
to analyze the spatial distribution of the factors such as forest 
part, the tree kind, forest kind and store, then studies the present 
situation and the form of various tree seeds in certain scope 
spatial distribution. According to the different geographical 
position, the condition of local growth, the tree kind, the 
transportation condition, we can implement the overall 
planning to the existing resources, the optimized structure, 
definite spatial use ability, to enhance the value of the forest. 
(3) Resources management. We can establish the forest 
resources investigation database system of different levels, to 
perfect forest resources file. According to the actual 
management situation and the growth model prompt renewal 
data, we can accurately grasp the forest resources condition and 
the change tendency promptly, and provide the technical basis 
for the all levels of government macroeconomic regulation and 
the decision-making. 
(1) Dynamic monitoring of forestry resources land utilization. 
The forestry land change includes the forest land type and the 
forest land area, and GIS, with the aid of ground investigation 
or the remote sensing image data, carries out the resources 
change situation to the mountain top and land parcel, and uses 
the formidable spatial analysis function, promptly to makes 
response to the forest resources space and time, the spatial 
distribution rule and the dynamic change process, and provides 
the basis for the science monitor forest land resources dynamic 
change, the reason analysis of forest land fluctuation, the use of 
the forest land and the control of forest land resources change. 
2. THE INTEGRATION RENEWAL OF VECTOR AND 
GRID MAP BASED ON 3S TECHNOLOGY 
The matching overlay of forest map from phantom to the grid 
or the vector one, the change information extraction of land 
utilization, the production of the orthogonal projection 
interpreting graphic ahead of the field operation, the 
investigation on the GPS guidance, the digitized renewal 
compilation of forest present situation graphic and the forest 
present situation database renewal, finally produces the 
submission achievement to enter the spatial database. The 
technical flow chart is shown in Figure 2. 
Figure 2. The Flow Chart of the Integration Renewal of Vector and Grid Forest Monitoring Map Based on 3S Technology