International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Spots 
Endes GPSX(m) [GPSY(m) |imageX(m|imageY(m) | AN| A Y |error(m) 
4318781| 39535767| 4318786| 39535768] -5| -1| 5.10 
4318564] 39535887] 4318562] 39535888 2] -1| 2.24 
4318644| 39535100| 4318647| 39535100} -3 0] 3.00 
121 | 4318838] 39535275] 4318823] 39535290f 15! -15| 21.21 
4318947| 39535223| 4318952| 39535230] -5| -7| 8.60 
4318798| 39535791| 4318802| 39535793] -4] -2| 4.47 
RMS(n) 7.44 
4318655| 39535529| 4318661] 39535526| -6 3| 671 
4318767, 39535731| 4318773| 39535740] -6| -9]| 10.82 
125 | 4318578] 39535806) 4318580] 39535818] -2] -12| 12.17 
4318474] 39535597] 4318479] 39535589f -5 8|] 9.43 
RMS(m) 9.78 
4318725] 39538905) 4318728] 39538897] -3 8.54 
4318872] 39538879] 4318882] 39538879] -10 0] 10.00 
4318941] 39539165] 4318951] 39539163] -10 10.20 
115 | 4318909] 39539170) 4318900] 39539172 9| -21] 9.22 
4318874| 39539091| 4318885| 39539091| -11 0| 11.00 
4318736| 39539095| 4318746] 39539093] -10 2| 10.20 
RMS(m) 9.86 
  
  
  
  
  
Table 5 Border Points” Coordinate Precision 
3.4.3 Area Precision: Arca precision is one of the important 
values for land use spots. Spots were selected to statistic their 
accuracy which categories and figures in images is similar to 
the reality. Arca between data measured from images and from 
ficld surveyed was compared. The result is listed below: 
  
  
  
  
  
  
  
  
  
  
  
| Spots ^. | Surveyed Measured Difference Error 
ID by GPS | by RS (m?) (m?) percent 
(m?) (100%) 
121 96356.39 9397137 2385.02 2.84 
ER 35053.58 36681.83 -1628.25 4.65 
123 37626.18 67703.39 -10077.2 17.49 
125 46698.9 51769.26 -5070.36 10.86 
139 23869.25 22347.79 1521.46 5.54 
151 70330.15 83637.52 -13327.4 18.95 
156 49675 68 32395.95 -2720.27 5.48 
160 9307.02 8153.7 1133.28 12.39 
159 21540.98 18800.94 2740.04 12.72 
195 67539.25 36368 49 53185 78.72 
  
  
  
  
  
  
  
Table 6. Arca Precision 
From the above table. the largest difference spots are No.195. 
Because the arca has been still changed after the images 
obtained. 
4. SOFTWARE 
A^ series of software facing to land use investigation (especially 
suitable to our countrv) has been developed. Most of land use 
investigation function is designed in this software according to 
considering our country’s investigation characteristic. It js 
models which include image 
divided in several 
otho-rectification. multi-resource images matching and merging, 
change information extracting and statistic automatically, 
surveying with GPS, map updating. and ete. With this series of 
software. data formats and standard can be unified. Computer 
solves many problems more rapidly and correctly which has 
been embarrassed land use investigation workers for many 
years. 
S. CONCLUSION 
Four kinds of Chinese counties have been classified according 
to their land use characteristic. economical development, area. 
the speed of land use change. and ete. Which Kinds of remote 
sensing images are the most suitable for some county land use 
investigation can be looked up from tablel. 
There are five schemes about. change spots extraction and 
surveying with GPS recommended for different county 
according to which kind of images and materials they are in 
possession of. 
From the experiment in Jinnan county of ‘Tianjin. we can 
conclude that using high resolution images (for example. 
SPOTS 2.5m) this year and the other reference materials(land 
use maps or land use database) last vear can extract the change 
information for 1:10000 map scale geometric need. Navigation 
GPS can guide people to the object place and ascertain land use 
category. 
In a word. modern technology of 738" is feasible and efficient 
for land use investigation. especially at this time that the high 
resolution remote sensing images can be obtained and 
processed easily. It will accelerate the speed about improving 
modern management of land use. Computers and GPS will 
substitute for human's hands. feet and eyes. Although change 
information can not be detected and extracted completely 
automatically. but with the aids of modern technology and 
software. the speed of interpretation will be accelerated. too. 
6. REFERENCES 
Yingcheng Li. Yanli Xue. Xiaolong Liu. 2003. the Feasibility 
Report for Modern Technology Research for Chinese Land Use 
Investigation 
Xiaolong Liu. Yanli Xue. Tongying Guo. 2004. Study Report 
for Modern Technology Research for Chinese Land Use 
Investigation. 
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