International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Gis Building Stages 
Discussion with gcospatieol 
data users 
[7] . Current 
Publications 
. Current 
‘ Y 
System decision 
System definition 
System objective 
V 
1) Svstem Analysis 
l. Determination of 
current situation 
2. User specification 
and requirement 
analysis System 
3. Proposals about new —=> Specification 
system 
4. Definition of essential 
problems for users 
5. Feasibility studies 
N 
System Design 
1. Planning 
2. System design ; 
r——] Data design 
Layer design 
Database design 
Metadata design 
NV 
3) Syszem Implementation 
+ l'echnology selection <—— 
and procurement 
2. Technology installation 
V V 
Design System 
Results l'estine 
Figure 1 
  
  
  
  
  
2. ABOUT THE CASE STUDY 
It is better to tell about some forestry terminology that was used 
in this case study. 
“Forestry plans” are used for management of wide areas that 
forests cover. These plans are changed in every ten years. 
According to these plans, forest area is divided into smaller 
partitions, called “stand”. A “stand” is a group of trees with2. 
similar stage of development and structures that enables to 
produce a local climate in current place. This is the smallest 
administration part in forestry plans and the minimum area for a 
stand is accepted as “1.0 hectare”. There are working teams 
which are responsible for stand areas’ care and the application 
of forestry plan to each stand. 
“Administration period” defines the economic cutting time at 
stand areas. This period is related to tree type, growing area...It 
usually takes 50-200 years long. So after this long period, the 
mistakes or missing of the plan is appeared that’s why the 
forestry plans are essential and need so much care while 
creating. 
“Canopy closure class”; In a stand area the closure of hillsides 
at trees which shows the shelter degree on the ground. These 
degrees are: 
178 
*  Degreee "0" — canopy closure class is smaller than %10, 
means widely apart, 
e. Degreee "1" — canopy closure class is between 9611-40, 
means less closed, 
e  Degreee "2" — canopy closure class is between 9941-70, 
means middle closed, 
e  Degreee "3" — canopy closure class is bigger than 9670, 
means closed. 
"Stage of development" is the classification by diameter of tree 
stems. These classifications are: 
e Class "a" means the diameter of tree stem is equal or 
smaller than 7.9cm. 
e Class "b" means the diameter of tree stem is between 
(8.0-19.90)em. 
e (lass “c” means the diameter of tree stem is between 
(20.0-35.90)cm. 
e Class "d" means the diameter of tree stem is equal or 
bigger than 39.0cm. 
In a stand area there can be more than one type of tree. It is 
limited with three types of trees in this case study. All types 
were entered into database. So the stage of development and 
canopy closure class are different for different types of tree that 
were also entered for each type of tree. 
"Cutting" means, the area of trees (m? : ha) in administration 
that is going to be cut. 
"Care" shows which type of care system is used in stand. 
"Planting space", if any new trees are planning to plant, 
planting spaces shows in how many meters will be between the 
new planted trees. 
"Cover type", the danger type such as insects that the stand area 
will be effected. 
“New growth”, is about the study in ecologic factors on new 
growth plants. 
The three steps are used in forest information system, too. 
1. Sytem Analysis : It is necessary to discuss with 
geospatial data users before this step. Trying to define the 
problems, needs, requirements. During this case study, there 
was no geographic information system in administration. It was 
better to discuss about GIS and advantages of it, in the 
beginning of study with the administration staff. Then the 
requirements and problems were discussed and defined with 
administration staff. A paper map (1:5000) and relevant 
documents were obtained. The paper map was about forestry 
plan. Feasibility study helps whether the concepts about the 
system is realistic. 
2. Sytem Design As it was defined before the 
administration is divided into smaller partitions, called “stand”. 
Except the technical benefits on smaller partitions of 
administration, one more benefit is easy management. 
There were geometries and attributes in forestry plan. There are 
usullay has three simple geometry, “point, line, polygon”.In 
this case study, it was decided to use two layers: 
“Stand”, the table name is “mes _alan”, 
“Road”, the table name is *yol kod", 
Stand layers’ geometry is “polygon”, 
Road layers’ geometry is “line”. 
Attributes in mes alan" table; 
bolme no : stand number 
msc tp kod  :types of trees 
msc kapa : canopy closure class 
glsm cag : stage of development 
mkat1 : the first type of tree in the stand