Beijing 1 Satellite

Beijing 1 Satellite
Study Subject
The Great Wall of China
Ming Dynasty
mainly: soil/brick
several meters high
six meters wide
New node
Huanghuacheng section
repaired contemporary era
relatively good condition
Badaling Section
some parts repaired in 2004
mostly collapsed
Conclusions
4m resolution can recognize
the Great Wall relatively easily
more info needed in Great Wall
autoextractgion
Beijing1 data can rival SPOT5
data in info extraction
resolution of multispectrum
less than
panchromatic> PCA &
GramSchmidt transform
achieve ok results
Extraction
autoextraction
Linear Object methods
filter methods
Grade Direction Analysis
Template matching
SNAKE Model
GIS method
Characteristics
when spatial res. less than
10m = linear
higher density
than environment
= high echo on
microwave
higher density than
environment = high spectral
value
Beijing 1
Comparison with
SPOT
spatial resolution= 2.5m
B1 domestic = cheaper
for Chinese scholars
Great Wall= 23 pixels
autoextraction also
somewhat problematic
Details
launched in 2005
launched by China
one of the Disaster
Monitoring
Constellation (DMC)
moonlet
wide image range= 600km
spatial resolution= 4m
high temporal resolution= 23 days
Great Wall= 12 pixels
Spatial Archaeology
detect ancient sites
investigate underwater sites
analyze ancient environments
make maps & build spatial info
rebuild ancient sites
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