The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLI-B8
https://doi.org/10.5194/isprs-archives-XLI-B8-867-2016
https://doi.org/10.5194/isprs-archives-XLI-B8-867-2016
23 Jun 2016
 | 23 Jun 2016

URBAN VEGETATION MAPPING BASED ON THE HJ-1 NDVI RECONSTRCTION

Feng Li, Liu Han, Zhu Liujun, Huang Yinyou, and Guo Song

Keywords: HJ-1 NDVI, Urban vegetation mapping, Nanjing city, Filtering algorithm

Abstract. HJ-1A/B NDVI (HJ NDVI) time-series data possess relatively high spatio-temporal resolution which is significant for the research on urban areas. However, its application is hindered by noise resulting from the restrictions of imaging quality and limits of the satellite platform. The NDVI noise reduction is necessary. Some noise-reduction techniques including the asymmetric Gaussian filter (AG), the double logistic filter (DL), the Savitzky-Golay (S-G) filter and the harmonic analysis (Hants) of NDVI time-series have been used to carry out the NDVI time series reconstruction, and based on the comparison results of different filter, S-G filter is the optimal in the application on urban areas. Finally,urban vegetation mapping is carried out based on the new HJ NDVI.