Application of Full Polarimetric ALOS PALSAR for Land Cover Mapping In Sleman District

Abstract

The simplest way to interpret polarimetric imagery for land cover classification is to use visual
interpretation methods. The existence of interpretations key as a tool for visual interpretation becomes
important when different interpreters can produce different results. The quality of the results of the
interpretation of land cover is then determined by the quality of the interpretation tool, in this case, the
key to the interpretation of land cover. The purpose of this study was to make the key to land cover
class interpretation in the Full Polarimetric ALOS PALSAR image, then the interpretation key was
used for reference in making land cover maps and measuring the accuracy of the results of the visual
interpretation. The image used in this study consisted of HH, VV, HV and VH bands. The location of
the study was in parts of Sleman District. The analysis is done visually by on-screen digitizing on
ALOS Palsar composite HH + VV HV + VH HH-HV image, which is then interpreted key. The true
test is done by means of the overall accuracy test and Kappa. Visually, ALOS PALSAR imagery is
able to distinguish 12 land cover classes in the research area, namely built land, rice fields, mixed
gardens, moorlands, salak garden, grass, forest, shrubs, open land, airports, water bodies and lava
with 83% Overall accuracy, and 78% Kappa accuracy.