常見(jiàn)例句Through the three demonstrations of ETM+ and TM,the process of algorithm and the way to build LUT are illuminated in detail.And the accuracy of snow cover mapping of this method is tested by NDSI. 通過(guò)ETM+和TM影像的三個(gè)例證,詳細(xì)闡明該算法流程以及查找表的創(chuàng)建,并以NDSI對(duì)其雪蓋制圖進(jìn)行精度驗(yàn)證。normalized difference snow index(NDSI) 雪蓋指數(shù) 返回 NDSI