Therefore, reinforced concrete (RC) buildings are common in this area.
Regarding structural damage, 4,806 houses were affected by the tsunami, of which 3,302
houses were destroyed completely, and as many as 1,504 were partly damaged. The
maximum water level of approximately 15 m reported at Khao Lak in the Phang Nga
province and of 7 m at Kamala and Patong Beach in Phuket gave these areas their respective
distinction as the worst and second-worst areas, with structural damage to 2,508 and 1,033
houses, respectively. High-resolution satellite images (IKONOS) taken before and after the
tsunami event were used for visual damage interpretation. The pre-event images were
acquired on 13 January 2003 and 24 January 2004 for Phang Nga and Phuket; the post-event
images were both acquired on 15 January 2005. In a recent study (Gokon et al., 2011), four
damage levels were classified “Not collapsed” (moderate, slight or no damage), “Major
damage”, “Collapsed” and “Washed away,” using a QuickBird satellite image with a
0.6×0.6 m2 resolution. However, the 1.0×1.0 m2 resolution of the IKONOS satellite image is
not fine enough for a visual interpretation to differentiate the damage levels of buildings.
Therefore, the classification of the building damage in this study was limited to “Not
destroyed” and “Destroyed” (Koshimura et al., 2009c). The remaining roof buildings were
interpreted as “Not destroyed” and those that had disappeared were classified as
“Destroyed”. Note that the buildings classified as “Not destroyed” may have had some sort
of Damage that could be identified by the satellite images. The results of the building
damage inspection in residential areas are presented in Fig. 10 (Suppasri et al., 2011a), which
shows damaged buildings in residential areas in Khao Lak, Phang Nga province (1,722
destroyed and 1,285 not destroyed) and the populated residential areas in Kamala and
Patong, Phuket province (233 destroyed and 1,356 not destroyed). The visual interpretation
data resulted in an accuracy of more than 90 per cent after being checked with the
investigation data.
Therefore, reinforced concrete (RC) buildings are common in this area.Regarding structural damage, 4,806 houses were affected by the tsunami, of which 3,302houses were destroyed completely, and as many as 1,504 were partly damaged. Themaximum water level of approximately 15 m reported at Khao Lak in the Phang Ngaprovince and of 7 m at Kamala and Patong Beach in Phuket gave these areas their respectivedistinction as the worst and second-worst areas, with structural damage to 2,508 and 1,033houses, respectively. High-resolution satellite images (IKONOS) taken before and after thetsunami event were used for visual damage interpretation. The pre-event images wereacquired on 13 January 2003 and 24 January 2004 for Phang Nga and Phuket; the post-eventimages were both acquired on 15 January 2005. In a recent study (Gokon et al., 2011), fourdamage levels were classified “Not collapsed” (moderate, slight or no damage), “Majordamage”, “Collapsed” and “Washed away,” using a QuickBird satellite image with a0.6×0.6 m2 resolution. However, the 1.0×1.0 m2 resolution of the IKONOS satellite image isnot fine enough for a visual interpretation to differentiate the damage levels of buildings.Therefore, the classification of the building damage in this study was limited to “Notdestroyed” and “Destroyed” (Koshimura et al., 2009c). The remaining roof buildings wereinterpreted as “Not destroyed” and those that had disappeared were classified as"ทำลาย" หมายเหตุที่อาคารที่จัดประเภทเป็น "ไม่ทำลาย" อาจมีบางอย่างความเสียหายที่ไม่สามารถระบุได้ ด้วยภาพดาวเทียม ผลของอาคารตรวจสอบความเสียหายในพื้นที่อยู่อาศัยจะนำเสนอใน Fig. 10 (Suppasri et al., 2011a), ซึ่งแสดงความเสียหายอาคารในพื้นที่ที่อยู่อาศัยในเขาหลัก พังงาจังหวัด (1,722ไม่ทำลาย และ 1,285 ทำลาย) และพื้นที่อยู่อาศัยมีประชากรในกมลา และป่าตอง จังหวัดภูเก็ต (233 ทำลายและไม่ทำลาย 1,356) การตีความภาพข้อมูลให้แม่นยำของมากกว่า 90 เปอร์เซ็นต์หลังจากการตรวจสอบด้วยการตรวจสอบข้อมูล
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