The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B3h. Beijing 2008 
504 
Now in the rectification model the N=5, use Eq.(2) and three 
equilibrium equations to form eight algebraic equations so that 
eight coefficients may be solved 
3. CHARACTERISTIC OF THE SOFTWARE 
The software was named “five points method”. To operate it is 
very easy. 
3.1 Characteristic of the Software 
1. Simply operating, only a little pick and data inputting are 
need to rectifícate an image 
2. Little special skill is required, anyone who knows how to 
use a computer basely can make it 
3. Nothing particular for computer using the software, general 
PC is OK 
4. The rectification can be completed within a short time. For 
example, only 4 minute id needed for a photo map of 
40cmx50cm 
3.2 Processing Steps 
Image 
Photo Map 
—► 
Cartography 
Figure 1 
1. Scan photo into computer 
2. Input control points coordinate 
3. Identity points on the photo has been input the computer 
(recognition of rectificated points) 
4. Supply mapping scale 
5. Rectification 
6. Obtain photo map after rectification 
3.3 With the Software, the Map can be Reached. 
Please see the following sample (photo map) 
Figure 2 
4. Conclusion 
As what here mention above the “know how of five points 
method “can be used easily, effectively and with very high 
accurately. 
With “GPS + Auto CAD “, the large scale map can be produced. 
It named “The Method for Making Large Scale Map by Using 
Digital Image “. 
The “ Patent Application “ was already presented on 2007.03.09 
with Application No. - 200710020222. X 
REFERENCES 
Robert L. Harder and Robert N. Desmaraist , Feb., 1972 
Interpolation Using Surface Splines. Aircraft Vol.9, No. 2 , Page 
189-191 
Ruan Wei, 1987 - 88, The Method of Weighted Residuals for 
Solving Surveying Collocation Problems, Journal of Tong Ji 
university, Page 33 ~ 42 
Wang Zhizhuo, July, 1986, Continuation of Concepts for 
Photogrammetry, Page 184-187