The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008 
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Figure 1 Primitives of 00-Solid Model Component 
(1) Node. 
The node is classified into six basis types, such as cru-node, 
inner-node, isolated-node, reference-node, interpolated-node, 
and feature-node. 
It can be divided into three classes from geometric feature: A. 
u-node is the start and end node of the arc. B. Inner-node is the 
node except cru-node. C. Isolated node is the node not in the arc, 
which is on the surface or in the inner of component. 
It can be divided into two classes from the data source and 
reliability: D. Reference-node is in the boundary arc of 
component and can’t be arbitrarily changed. These nodes are the 
first-hand information obtained from exploration or mine 
production. E. Interpolated-node is the interpolation node in 
order to improve the geometric modeling or attributes modeling 
accuracy. 
In order to increase the degree of automation modeling 
deliberately set the node type is feature-node, which is the 
common node of arcs with different attributes. 3DGMIS can 
automatically connect the feature-nodes of the same attributes in 
the three component polygons, and form feature-line. 
(2) Arc 
The arc, defined by cru-node(start-node and end-node) and a 
number of inner-nodes, is the border of polygon. Feature-line is 
abstracted as arc, but it have a special meaning or 
significance-bound meaning, and can be automatically connect 
by system or connect interactive by users. 
(3) Polygon 
It is outer border or inner borders of a region, and have direction 
(counterclockwise as positive, negative for the 
clockwise).Polygon composed by arcs. 4 
(4) Region 
The common face between component and another component 
or between component and surface object (such as fault plane) 
is abstracted as region. And it often is a part of component-face. 
Region, having a certain attributes, is composed by one 
outer-polygon, n(n ^ 0) inner-polygon, and m(m ^ 0) 
isolated-nodes. As an independent object, region can be 
modeled into one only regional with using modeling algorithm 
(such as generating a DTM with polygons and isolated-nodes 
using certain algorithm). This will help to reduce duplication of 
constructing common face, but also to avoid singular problem 
of common face. During dynamic updating of geological model, 
automatically updating of component-face, component, surface 
object or volume object can be realized with only updating 
region. Which will reduce the necessary resources of the 
dynamic maintenance, for example, when adding a 
reference-node to a component face, only the region including 
this node need to updating, then component face, component, 
surface object and volume object can be automatically updating. 
(5) Component face 
Component further classified into component-side-face, 
component-up-down-face, component-polygon-face. The 
sections in the OO-Solid model have generalized meaning, 
which isn’t confined to geological section; it could be level, tilt 
or arbitrary surface of the two-dimensional space. 
Component-polygon-face can be composed of a number of 
polygons or can degenerate into a line or a node. The 
classification of component-side-face with component-up- 
down-face is conducive to seamlessly integrate with facet 
model. 
(6) Component 
Component can be defined by fore-component-polygon, 
mid-component- polygon and post-component-polygon and 
which surface can be represented by component faces. 
3.2 Superiority for modification of primitives 
The revised OO-Solid Model component in this paper is 
different from the model component put forth by writer (2002) 
in the following aspects: 
(1) In dynamic modeling or updating, it is very important to 
define node from three different angles. Dividing the node into 
Cru-Node, Inner-Node, and Isolated Node from the geometric 
angle will help form the topological relationship of polygon 
automatically, and dynamically update node data change in 
dynamic updating in geological modeling. Dividing the node 
into Reference Node, Interpolated Node from the aspect of data 
source and reliability will be beneficial to the topological 
consistency analysis and dynamic updating of node data. The 
division of feature node is to dynamically form feature joining 
line, which will help distinguish region of different features and 
then distinguish line object, face object, body object. 
(2) The connotation of feature joining line changed from the 
original definition “the line segment joining the feature nodes 
on section border” to “the arc joining the feature nodes on 
section border”. The revised definition has even wider meanings, 
including not only the inferred information given by users 
mutually and binding line, but the dividing arc of Component 
Up-Down Face and Component Side-Face, in order to express 
the face object in a more convenient way. 
(3) The addition of two model components: polygon and region; 
polygon is the inner or outside border of region, and region not 
only decides the inner and outside border, but take Isolated 
Node into consideration. The definition of region ensures that 
section polygon can show the relationship of embodiment of 
polygon and even express the relationship of embodiment of 
geological object. Meanwhile, region is a part of component 
face and the modeling of region is isolated from data structure. 
Therefore, region is not only the member of neighboring 
components, but also a part of a face object, which will help the 
component further form body object and face object. 
(4) The component face was further divided into Component 
Polygon Face, Component Up-Down Face, and Component 
Side-Face, which will help integrate the different faces of 
component, form model of their own and show the object of 
different faces separately. For example, Component Side-Face 
can be seen as fault surface, Up-Down Face can be seen as 
upper plate or bottom plate of ore body. Through the features of 
region and their topological relationships, the component