Suitability of Landsat TM and JERS1 Data in Land Cover/Use Mapping Application
4.0 Results and Discussions
4.1 Image
There types of images were produced for the visual analysis, namely, Landsat TM 453 (ON RGB), single data JERS-1 (panchromatic) and complementary HIS of JERS1-Landsat TM.
4.2 Comparison between images
All three images showed a clear separability between land and large water bodies such as reservoirs. There was also a good separability between pineapple and other types of crops in all the images. In the single data JERS-1 image (plate 2), pineapple area appeared darker the smoother texture than other types of crops. However, different stages of growth of pineapple, indicated by the boundary of pineapple plate could be observed more clearly in the Landsat TM image (Plate 1).
Single data JERS-1 image (Plate 2 and Plate 5) did not show clear discrimination between oil palm, rubber, horticulture, forest and built-up areas. The complementary HIS image (Plate 3 and Plate 6) showed a better discrimination of land cover/use boundaries compared to the single date JERS-1 image (Plate 2 and Plate 5). Nevertheless, there was no marginal improvement in discriminating different land cover/use features between the Landsat TM and complementary HIS images. Similarly, features in areas covered by clouds could not be clearly established from the complementary HIS image (Plate 6)
Plate 1: Landsat TM Image (126/59) Bands 453
Plate 2: JERS Image (117/297)
Plate 3: IHS - Landsat TM and JERS
Plate 4: Landsat TM Image (125/59) Bands 453
Plate 5: JERS Image (117/298)
Plate 6: IHS - Landsat TM Image JERS
5.0 Conclusions
Visual analysis of single data JERS-1 image could not discriminate the different types of land cover/use features except pineapple. There was no additional advantage that be derived in the complementary use of JERS-1 and Landsat TM data in land cover/use mapping applications.
Bibliographies
- Z.A. Hassan., K.M.N. Ku Ramli, I. Selamat and K.F. Loh. "Complementary Nature of SAR and Optical Data for land Cover/use Mapping", 18th . Asian conference on Remote Sensing, Kuala Lumpur, Malaysia, 20-24 October, 1997.
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Guo Huadong and Zheng Lizhong (editors) "Microwave Remote Sensing for Earth Observation", Science press, China, 1995.
