A comparison of lineament and fracture trace extraction from LANDSAT ETM+ panchromatic band and panchromatic aerial photograph in Gunungsewu karst area, Java-Indonesia

[摘要] This paper aims at exploring interpretability of the panchromatic band of Landsat Enhanced Thematic Mapper Plus (ETM+) compared to the panchromatic aerial photograph in lineament and fracture trace extraction. Special interest is addressed to karst terrain where lineaments and fracture traces are expressed by aligned valleys and closed depressions. The study area is an single aerial photographic coverage in the Gunungsewu Karst, Java-Indonesia which is characterized by a lineament-controlled cone karst and labyrinth-cone karst. The result shows that the recording time of the Landsat ETM+ with respect to the shadow resulting from the sun illumination angle is the key factor in the performance of lineament and fracture traces extraction. Directional filtering and slicing techniques significantly enhance the lineament interpretability of the panchromatic band of Landsat ETM+. The two methods result in more lineaments and fracture traces which T-test affirm in 0.001 and 0.004 significant levels. Length based lineament analysis attains a better result compared to frequency based analysis.

[发布机构] Faculty of Geography, University of Gadjah Mada, Yogykarta, Indonesia^1;Faculty of Mineral Technology, UPN Veteran University, Yogykarta, Indonesia^2

[效力级别] 计算机科学 [学科分类] 计算机科学（综合）

[关键词] Aerial Photographs;Directional filtering;Enhanced thematic mapper plus (ETM+);Interpretability;Karst terrains;Lineament analysis;Panchromatic bands;Sun illumination