Fig. 1. Areaof image coveraged and ground control point distribution

Fig. 2. Flow chart of economic activity change area detection

Fig. 3. Flight path interpolation results

Fig. 4. Comparison of smartphone light photos with ground control points in Google Earth

Fig. 5. POI density map of the study area in September, 2019

Fig. 6. Passenger aircraft night light remote sensing image of the study area in August 28, 2019

Fig. 7. Lujia-01 night light remote sensing image of the study area

Fig. 8. VGI photos before and after the demonstration