6B-4-2 
and meteorological data. 
The moving observation is to identify the mentioned four kinds 
of informations by the vehicle mounted equipment. And it is 
fundamental data for spatial extension of mentioned fixed-point 
observation. 
2. DEVELOPMENT OF SPATIAL DATA ACQUISITION 
TOOL 
2.1 Functions of Developed System 
The basic functions of developed spatial data acquisition tool 
are classified to main three parts: 
1) Data Acquisition 
View imageries are observed and recorded by CCD or Video 
Camera. And GPS and 3D sensor instruments that mounted 
on platform measure its spatial location and sensor (camera) 
condition. All of data can be refereed with the same GPS time. 
2) Data Collection/Calibration 
All of collected data is transferred to the computer and each of 
them integrated in the same time dimension. About recorded 
imageries, some of interested area stereo pair imageries are 
selected and captured from the video recorder according to the 
every collected time. Finally all of interested area imageries 
are accumulated with location and camera condition data as an 
analysis. 
3) Mapping 
3-Dimensional measurement is performed by referring 
accumulated other condition data. Resulting to the spatial data 
acquisition, map is generated with the scale range from 
1:25,000 to 1:50,000. 
2.2 System Configuration 
Our developed tool or system configuration is illustrated as in 
Figure.1. 
CCD Camera 
(Field Work) 
Video/Computer 
Interface 
3D Sensor 
(Lab. Work) 
RS232C 
i Range Finder 
i (FieldWork) 
Fig. 1 System Configuration 
Both left and right sides of this figure are image and reference 
data recording parts at fieldwork. Mainly CCD camera is used for 
observation and normal video camera is for recording and 
monitoring. Continuous field view image is collected and 
recorded to video recorder automatically. The platform that we 
suppose, is crane at the fixed-point observation and land-based 
vehicle at moving observation respectively. GPS receiver is used 
for camera positioning 
The middle of its is data analysis part at lab. work. At the first 
step, recorded continuous image is re-played for searching 
interested point by our human eyes and captured and digitized as 
the digital stereo pair images with 1,500 width X 1125 depth, 
RGB by video/computer interface. Here is to generate the 3D 
data (mentioned four kinds of informations) from the digitized 
stereo imageries and orientation parameters that obtained by 
platform mounted equipment. 
2.2 Orientation Parameters 
Our developed system supposes following conditions; 
1) Exterior orientation parameters 
Camera Position (Xo, Yo, Zo) is provided by GPS receiver. 
Camera Condition (co, , k ) by 3D sensor. 
3) Inner Orientation parameters 
All of them are estimated by mentioned later Lab. level 
experiment. 
2.3 Lab. Level Experiment for System Evaluation and 3D 
Accuracy Verification 
In order to confirm on the camera capabilities and to estimate 
inner orientation parameters, Lab. level experiment was carried 
out. 
Figure.2 is the photo of its experiment. 
Fig.2 Lab. Level Experiment 
1 ) Experiment 
Target for 3D Measurement 
The configurations of actual Lab. level experiment and axis 
definition are shown in Figure 3. White circle points are used for 
control of camera calibration and black circle points are the 
verification of accuracy respectively. The camera with 3D sensor 
can move on dotted line. So that base line can be controlled by 
manual operation.