PROCEEDINGS PIT IAGI RIAU 2006
The 35^th IAGI Annual Convention and Exhibition
Pekanbaru – Riau, 21 – 22 November 2006

APPLICATION OF INTERFEROMETRIC SYNTHETIC APERTURE RADAR (IFSAR)
DATA FOR GEOLOGICAL MAPPING

Ipranto¹, Tony Said²

¹Pusat Penelitian dan Pengembangan Geologi (P3G), Jl.Diponegoro No.57 – Bandung Indonesia
ipranto@yahoo.com
²PT. ExsaMap Asia, Plaza 89 Jl.HR Rasuna Said No.6 Jakarta Indonesia
tsaid@exsamap.com

ABSTRACT

Geology mapping process requires three dimension accurate data. In most cases of high mountain and steep hill terrain, none optical remote sensing technique can provide stereo images. The advantage of radar in cloud penetration should be the only alternative of data source for geology mapping. High resolution Interferometric Airborne Synthetic Aperture Radar (IFSAR) produces image with appearance close to panchromatic optical image. Merge data IFSAR with color optical satellite data give more beneficial in interpretation some geological features. Geology mapping method is visual interpretation of radar image called ORI – Orthorectified Radar Image that display in three dimension and superimpose with contour line and color optical satellite image. Digital processing equipment is workstation computer with socet set system, desktop computer with ER Mapper and Mapinfo.

Radar acquire the data in side look model has advantage in expose image for geological features such as drainage pattern, rivers, shaded relief which indicate geology structure and lithology. Contour line as one important part of geology map can generate from DSM (Digital Surface Model) IFSAR. Contour line pattern show terrain model and give significant support in interpretation. Type III of IFSAR Data is adequate to generate geology map up to scale 1:25.000.

The purpose of this paper presents some new geology features have been found from IFSAR data compare with the original geology data in scale 1:250.000. The research was using IFSAR Data merge with Landsat TM. Research area is Makasar – South Sulawesi Province that covers in Bakosurtanal Map tile #2011. The new features have been found still need validation ground survey in the future.

Keywords: IFSAR, DSM, ORI, mapping.