Construction of green wave correction normalized water body index for GF-7 images

doi:10.13474/j.cnki.11-2246.2023.0133

Abstract

Abstract: Based on the construction of high-resolution GF-7 satellite image water index, taking Pukou district of Nanjing as the research area, a green normalized difference vegetation index (GNDVI) is proposed, and the accuracy is compared with the single-band threshold method, NDVI, NDWI, CWI and SBI. The results show that the overall accuracy of the GNDVI index method is higher than that of other methods, reaching 97.26%, the water body information is more complete, and the suppression of mountain and building shadows is better, and the effect is optimal. It provides a usable technical reference for GF-7 remote sensing images in the application and research of water resources protection.

Key words: GF-7 satellite, water body extraction, construction of water body index, GNDVI, accuracy

CLC Number:

P237

MA Haichao, WANG Chongchang, HE Zhaoning, XIN Sheng, WANG Lei. Construction of green wave correction normalized water body index for GF-7 images[J]. Bulletin of Surveying and Mapping, 2023, 0(5): 38-43.

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