基于遥感影像的雪线高程提取方法对比分析——以天山北坡为例

干旱区地理 ›› 2015, Vol. 38 ›› Issue (4): 788-796.

基于遥感影像的雪线高程提取方法对比分析——以天山北坡为例

张连成^1,2, 胡列群², 李帅², 郑照军³, 侯小刚²

1. 新疆师范大学地理科学与旅游学院, 新疆乌鲁木齐 830054;
2. 中国气象局乌鲁木齐气象卫星地面站, 新疆乌鲁木齐 830011;
3. 国家卫星气象中心, 北京 100081

收稿日期:2014-11-18 修回日期:2015-02-09 出版日期:2015-07-25
通讯作者: 胡列群,主要从事积雪遥感方面的研究.Email:hlq1965@163.com
作者简介:张连成(1990-),男,江苏徐州人,在读硕士研究生,主要研究方向为资源环境遥感.Email:524480929@qq.com
基金资助:
中国沙漠气象科学研究基金(sqj2012013);新疆师范大学研究生科技创新项目基金资助(XSY201502005)

Comparison of snow line elevation extraction method based on remote sensing image:a case of north slope of Tianshan Mountains

ZHANG Lian-cheng^1,2, HU Lie-qun², ZHENG Zhao-jun², LI Shuai³, HOU Xiao-gang²

1. College of Geography Science and Toursim, Xinjiang Normal University, Urumqi 830054, Xinjiang, China;
2. Urumqi Meteorological Satellite Ground Station, Urumqi 830011, Xinjiang, China;
3. The National Meteorological Satellite Meteorological Center, Beijing 100081, China

Received:2014-11-18 Revised:2015-02-09 Online:2015-07-25

摘要/Abstract

摘要： 利用2010-2014年6~8月MOD10A1、MOD10A2及HJ-1/CCD数据,以天山北坡为研究区,对比分析了积雪持续时间比率法及最大值合成法在雪线高程提取中的精度和适用性。结果表明:当MOD10A1以旬合成,积雪持续时间比率阈值为40%时,提取的雪线高程与"真值"最为接近;基于混淆矩阵法,以目视解译得到的HJ-1/CCD积雪面积为"真值",分析得出,积雪持续时间比率法提取积雪面积的总体精度较高,为98.59%,khat系数为0.90,最大值合成法的总体精度仅为85.29%,khat系数为0.70;基于统计学的方法,计算得出,积雪持续时间比率法提取的雪线高程与"真值"的相关系数较高,为0.77,其平均误差、正、负误差、绝对平均误差以及均方根误差相对较低;最大值合成法提取的雪线高程与"真值"的相关系数较低,仅为0.54,其平均误差、正、负误差、绝对平均误差以及均方根误差相对较高;积雪持续时间比率法提取的雪线高程结果优于最大值合成法。

关键词: 雪线, 积雪持续时间比率法, 最大值合成法, 天山北坡

Abstract: On the basis of the MOD10A1, MOD10A2 and HJ-1/CCD data from June to August in 2010 to 2014, with the north slope of Tianshan mountains as the study area, this paper compares and analyzes the snow duration ratio method and the maximum synthesis method in the snowline elevation extraction accuracy and applicability. The results show that snow line height' s error is minimum while snow duration ratio method taking the 40% threshold extraction. Based on confusion matrix method, snow area of HJ-1/CCD is "true value" by the visual interpretation. The results demonstrate that snow duration ratio method to extract snow area's overall accuracy is higher, the accuracy is 98.59% Khat coefficient is 0.90,the accuracy of the maximum synthesis is only 85.29%, Khat coefficient is 0.70. Based on the statistical method, the paper calculated that snow duration ratio method to extract the snowline elevation has higher correlation coefficient of 0.77 with "true value". The average error, error of positive and negative, average absolute error and root mean square error is relatively lower. The maximum synthesis method extracting line height and the same area "true value" has lower correlation coefficient of only 0.54. The average error, error of positive and negative, average absolute error and root mean square error is relatively higher. Using snow duration ratio method to extract the snowline elevation results is better than that of the maximum synthesis method.

Key words: snowline, snow duration ratio method, the maximum synthesis method, the north slope of Tianshan mountains

中图分类号:

TP79

张连成, 胡列群, 李帅, 郑照军, 侯小刚. 基于遥感影像的雪线高程提取方法对比分析——以天山北坡为例[J]. 干旱区地理, 2015, 38(4): 788-796.

ZHANG Lian-cheng, HU Lie-qun, ZHENG Zhao-jun, LI Shuai, HOU Xiao-gang. Comparison of snow line elevation extraction method based on remote sensing image:a case of north slope of Tianshan Mountains[J]. , 2015, 38(4): 788-796.

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