CAJ | 학술논문

应用阈值法对青海可可西里地区主要湖泊的遥感影像进行水体信息提取,根据水体与其它地物在ETM+的5波段具有很好的区分效果,经反复尝试在该波段找到了适合各个湖泊的分离阚值.通过目视解读,并与相关地形图对比检验,湖泊水体可较为准确提取出.利用ENVI软件得到包含湖底信息的合成图像,选择其中信息丰富的假彩色合成图像进行解译,根据其色调并结合近岸地形信息初步判断出了湖底的地形地势,并在永红湖底发现了一个特殊的环状构造.
응용역치법대청해가가서리지구주요호박적요감영상진행수체신식제취,근거수체여기타지물재ETM+적5파단구유흔호적구분효과,경반복상시재해파단조도료괄합각개호박적분리감치.통과목시해독,병여상관지형도대비검험,호박수체가교위준학제취출.이용ENVI연건득도포함호저신식적합성도상,선택기중신식봉부적가채색합성도상진행해역,근거기색조병결합근안지형신식초보판단출료호저적지형지세,병재영홍호저발현료일개특수적배상구조.
The threshold method was used to extract the information of lake water bodies in Hoh Xil region.Lake water bodies can be distinguished perfectly from other landforms in ETM + 5 band,so the messages of main lakes in Hoh Xil region were extracted by remote sensing image and appropriate threshold values determined by threshold method.By visual interpretation and the comparison with topographic map,the lake water infermation was exactly gained.And by ENVI software image compounding,the pseudcolor images in combination with topographic data were chosen to interpret the lake bottom topography and lake water depth variation.It is shown that Cuodarima is not a deep-water lake as previous research,the ring structure in the bottom of Yonghong lake is a new discovery.