Global Land Cover Classification Based on Microwave Polarization and Gradient Ratio (MPGR) - Geoinformatics for Intelligent Transportation - page 23

AMSR-E 6.9 H BT Value range for land cover classes on 30/09/2011.

350

300

250

200

150

Maximum BT in Kelvin
Max. BT std. value
Mean BT in Kelvin
Min. BT std. value
Minimum BT in Kelvin

100

50

0123456
Land Cover Classes

7 8 9 0 1 2 3 4 5 6

AMSR-E 6.9 V BT Value range for land cover classes on 30/09/2011.

400

350

300

250

Maximum BT in Kelvin
Max. BT std. value
Mean BT in Kelvin
Min. BT std. value
Minimum BT in Kelvin

200

150

0123456
Land Cover Classes

7 8 9 0 1 2 3 4 5 6

Fig. 2 Seventeen land cover classes maximum, minimum, mean and standard deviation
temperature in kelvin for 6.9, 10.7, 18.7, 23.8, 36.5 and 89.0 Ghz AMSR-E frequency

Using AMSR-E frequencies and MPGR is an effective way to derive surface
type based on the land surface vegetation cover classi cation. We used two lower

frequencies (10, 18 GHz), and two higher frequencies (36, 89 GHz) for further
analysis. For land cover classi

cation on the basis of MPGR, we focused on three
combinations of PR-PR, PR-GR and GR-GR, and plot two graphs for each com-
bination (Fig. 3 ). The scatterplots identify all 17 land cover classes (as shown in
Fig. 3 ). Water pixels are located at highest value in the graph, then ice, bare soil,
built-up area, and grasslands, savanna, mixed vegetation, degraded vegetation and
dense/evergreen vegetation, respectively.