UNIMARC Field 121b builder
Altitude of Sensor
terrestrial
terrestrial
aerial
aerial
space
space
Attitude of sensor
low oblique
low oblique
high oblique
high oblique
vertical
vertical
Spectral bands : 01 to 99 = number of bands, xx = not applicable
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Quality of image
poor
poor
fair
fair
good
good
very good
very good
Cloud cover
1/8
1/8
2/8
2/8
3/8
3/8
4/8
4/8
5/8
5/8
6/8
6/8
7/8
7/8
completely covered by clouds
completely covered by clouds
Mean value of ground resolution
less than 1 centimetre
less than 1 centimetre
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
greater than 9 kilometres
greater than 9 kilometres
not applicable
not applicable
Centimetres
Centimetres
Decimetres
Decimetres
Metres
Metres
Decametres
Decametres
Hectametres
Hectametres
Kilometres
Kilometres
not applicable
not applicable
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