Urban built-up area remote sensing extraction method and system based on multi-scale space nesting

The invention discloses a city built-up area remote sensing extraction method and system based on multi-scale space nesting, and the method comprises the steps: constructing a city index VANUI according to MODIS NDVI data and NPP-VIIRS noctilucent data; performing adaptive segmentation on the city index VANUI by using the statistical data of the city built-up area to obtain a city built-up area boundary B1; calculating a morphological building index MBI according to the urban building area boundary B1; constructing an adaptive segmentation model, and segmenting the morphological building index MBI to obtain urban building information O; performing clustering analysis on the urban building information O to obtain regular building information S; and calculating a convex hull of the regular building information S, and obtaining the boundary range of the urban built-up area. According to the method, nesting of the multi-scale space is realized, the extraction result of the urban construction area is constrained a