P2-1-4 
Table 1 shows Affine transformation error at each control points. 
No. 
First Step 
Second Step 
DX [m| 
DY fml 
DX [ml 
DY [ml 
1 
2.36 
-0.45 
2.50 
-0.10 
2 
1.25 
0.56 
1.04 
1.75 
3 
3.32 
-0.69 
3.52 
-0.40 
4 
-4.09 
0.67 
-3.80 
0.85 
5 
-3.87 
-0.60 
-3.83 
-0.01 
6 
1.02 
0.50 
1.67 
0.81 
7 
— 
— 
-2.72 
-1.16 
8 
— 
4.38 
2.00 
9 
— 
— 
-2.76 
-3.75 
Table 1 Differences of Affine Transformation 
4 INPUT RESULTS 
Field surveyors input field investigation results as digital data on 
geometrically corrected image. (Figure 7) 
Since geometrically corrected image has coordinates 
corresponding on ground, the investigation results have ground 
coordinates on field. 
The merits getting investigation results as digital data are as 
follows. 
(1) It is easy to carry and store field investigation results since 
it is not necessary to remake photographs. 
( 2 ) Since using CAD to input data, all field surveyors are able 
to draw legible results by. 
( 3 ) It is able to match results with DM data. (Figure 8) 
(4 ) Contradictions between investigation results and DM data 
are reduced by efficient of (3). 
Figure 7 Field Investigation Results 
Figure 8 Field Investigation Results + DM data 
5 3-DIMENSIONAL MEASURING 
It isn’t necessary to get precious position at field reconnaissance 
survey. Because, the precious position of objects are measured at 
plotting using stereo photographs. 
The places that it is difficult to analyze from stereo photographs 
are measured at field by electronic plane table. Is this measuring 
process able to be executed using GPS and digital image? 
The system of digital stereo plotter has been developed in field of 
digital photogrammetry. We attempted using videotape recorder 
with stereo adapter to take stereo image, because videotape 
recorder is conveniently used at field. We used LET’S 
Corporation Nuview adapter as stereo adapter. We attempted 
orientation, which control points survey is not necessary. This 
orientation method needs works as follows. 
( 1 ) Preparing two staffs whose length are already 
known.(Figure 9) 
( 2 ) Measuring coordinate of left staff below point, (Point 1). 
( 3 ) Measuring length one of mapping’s object at field. 
Figure 9 Taking Image by Stereo Videotape Recorder