Ming Dynasty

mainly: soil/brick

several meters high

six meters wide

New node

repaired contemporary era

relatively good condition

some parts repaired in 2004

mostly collapsed

Linear Object methods

when spatial res. less than10m = linear

higher densitythan environment= high echo onmicrowave

higher density thanenvironment = high spectralvalue

spatial resolution= 2.5m

B1 domestic = cheaperfor Chinese scholars

Great Wall= 23 pixels

autoextraction alsosomewhat problematic

launched in 2005

launched by China

one of the DisasterMonitoringConstellation (DMC)moonlet

wide image range= 600km

spatial resolution= 4m

high temporal resolution= 23 days

Great Wall= 12 pixels