Integrating geographical data and phenological characteristics derived from MODIS data for

Integrating geographical data and phenological characteristics derived from MODIS data for

improving land cover mapping

CAI Hongyan;ZHANG Shuwen;BU Kun;YANG Jiuchun;CHANG Liping

【期刊名称】《地理学报（英文版）》 【年(卷),期】2011(021)004

【摘要】The study developed a feasible method for large-area land cover mapping with combination of geographical data and phenological characteristics,taking Northeast China (NEC) as the study area.First,with the monthly average of precipitation and temperature datasets,the spatial clustering method was used to divide the NEC into four ecoclimate regions.For each ecoclimate region,geographical variables (annual mean precipitation and temperature,elevation,slope and aspect) were combined with phenological variables derived from the moderate resolution imaging spectroradiometer (MODIS) data (enhanced vegetation index (EVI) and land surface water index (LSWI)),which were taken as input variables of land cover classification.Decision Tree (DT) classifiers were then performed to produce land cover maps for each region.Finally,four resultant land cover maps were mosaicked for the entire NEC (NEC_MODIS),and the land use and land cover data of NEC (NEC_LULC) interpreted from Landsat-TM images was used to evaluate the NEC_MODIS and MODIS