DOI: 10.1016/j.jag.2013.05.016
Scopus记录号: 2-s2.0-84897585250
论文题名: A new methodology to map double-cropping croplands based oncontinuous wavelet transform
作者: Qiu B ; , Zhong M ; , Tang Z ; , Wang C
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 26, 期: 1 起始页码: 97
结束页码: 104
语种: 英语
英文关键词: Continuous wavelet transform
; Cropping intensity
; Double-cropping croplandsa
; EVI
; MODIS
Scopus关键词: agricultural land
; data set
; double cropping
; mapping method
; MODIS
; pixel
; spatial distribution
; time series
; transform
; vegetation index
; China
; Henan
英文摘要: Cropping intensity is one of the major factors in crop production and agricultural intensification. A newdouble-cropping croplands mapping methodology using Moderate Resolution Imaging Spectroradiome-ter (MODIS) time series datasets through continuous wavelet transform was proposed in this study. Thismethodology involved four steps. First, daily continuous MODIS Enhanced Vegetation Index (EVI) timeseries datasets were developed for the study year. Next, the EVI time series datasets were transformedinto a two dimensional (time-frequency) wavelet scalogram based on continuous wavelet transform.Third, a feature extraction process was conducted on the wavelet scalogram, where the characteristicspectra were calculated from the wavelet scalogram and the feature peak within two skeleton lines wasobtained. Finally, a threshold was determined for feature peak values to discriminate double-croppingcroplands within each pixel. The application of the proposed procedure to China's Henan Province in2010 produced an objective and accurate spatial distribution map, which correlated well with in situobservation data (over 90% agreement). The proposed new methodology efficiently handled complexvariability that might be caused by regional variation in climate, management practices, growth peaksby winter weed or winter wheat, and data noise. Therefore, the methodology shows promise for futurestudies at regional and global scales. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79751
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Key Laboratory of Spatial Data Mining And Information Sharing of Ministry of Education, Spatial Information Research Centre of Fujian Province, Fuzhou University, Fuzhou 350002, Fujian, China; Community and Regional Planning Program, University of Nebraska-Lincoln, Lincoln, NE, United States
Recommended Citation:
Qiu B,, Zhong M,, Tang Z,et al. A new methodology to map double-cropping croplands based oncontinuous wavelet transform[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,26(1)