Differences of Sar Image Between JERS-L and
ERS-L To Land Use/Land Cover Investigation
Anusom Chantanaroj, Kenji Otsuka, Keisuka Katsuta
Abstract
Since SAR data had been developed to use in remote sensing technology. Areas in South- West of Bangkok were selected to study the differences between JERS-1 and ERS-1 SAR images for land use/land cover application. It was observed that parameters influencing the backscatters were orientation.of the object, incident angle and object height. Building oriented parallel to flight direction backscatter were very strong while object height which less than around 30 cm. would be very low. Angle of roof pitch was also one of the parameters influencing the RADAR backscatters.
Introduction
The joint research between the Geographical Survey Institute of Japan ( GSI) and Department of Land Development of Thailand (DLD), funded by the Science and Technology Agency (STA) has been set up since 1992 to conduct researches on the development of remote - sensing technology, using satellite data, particularly using ERS-1 and JERS-1 data in order to contribute environmental monitoring in tropical area. In 1993 project areas were carried out in Kanto Plain, Japan and Bangkok, Thailand to develop Manual of SAR Image Interpretation. In ; 1995, SAR images from JERS-1 and ERS-1 of the South-west of Bangkok were selected to study the differences between the two image data for land use/land cover application. Field verification was carried out in February 1995 and data analysis was done in GSI, Japan.
Outlines Of The Procedure
-
Collecting data
- Specify area for field investigation
- Field survey and get some information in the area
- Discussion and report
Methods Of Image Processing
- Gray scale conversion from 16 bit to 8 bit data
- Filtering
- low-pass for noise removing
- high-pass for image sharpening
