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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B4, 2012 
XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia 
1. Introduction 
It is known to all that planning programe 
usually use 1:2000 scale maps and the 
Photogrammetry system also mainly provides 
them. It seems to be the representative works 
of the large scale cartograph in large 
quantities but for the great changes of the 
time the function of cities and towns become 
and more diversified. The maps applied to 
finance or industry call for precise and 
complete geographical information to ensure 
the measures for pollutions, and security or 
traffic affairs could be carried out smoothly. 
The investment of construction of the real 
estate development needs to be measured 
and paid for on the basis of the maps. 
Let's take the construction of the highway for 
example. If the investment is 150 million 
Yuan, in the area of river network and on the 
soft foundation building a highway in the 
length of 30km must carry expenditure as 
30% of the total cost for the treatment of the 
soft ground, because the inaccurate maps 
couldnt help the Investors check the 
measurement and payment, for they are lack 
of detailed information and with unsatisfied 
elevation and density. If 1096 of the content 
151 
cause's quarrel millions of cash will be cost. 
So, obviously, itis 1:1000 scale maps but not 
1:2000 maps suitable for use. 
2. Brief review of making large scale map 
Stiff are all familiar with the function of GPS 
and RTK is suitable for all measuring works, 
from geodetic to cadastral surveying. It can 
set position quickly and accurately so 
became the definitive mapping instrument 
for drawing 1:500 scale maps compared with 
the digital photogrammtry it enjoys 
extraordinary accuracy, besides that, RTK or 
total station digital mapping also has 
shortages as following: 
1l. Operators couldt has an overall 
impression of the mapping place. 
2. To ensure the visibility in the area with 
poor situation for mapping, which have to 
add more measuring stations. 
3. The measuring points are discrete; the 
lines are not natural and smooth, especially 
when the objects have irregular form. 
Now the state method comes as a substitute, 
which keeps all advantages while covers the 
shortages that are digital photo-planimetric 
method. In field total station are also set to