Deformations monitoring in complicated-surface areas by adaptive distributed Scatterer InSAR combined with land cover: Taking the Jiaju landslide in Danba, China as an example

•The ADSI-CLC method is developed to increase the number of DS while keeping quality.•ADSI-CLC introduces land cover map into DS adaptive selection and SHP identification.•A case study of Jiaju landslide is used to demonstrate the effectiveness of ADSI-CLC.•The number of DS detected by ADSI-CLC is up to nearly 10 times that of StaMPS-SBAS.•Highly agreement between ADSI-CLC and SBAS and GNSS measurements can be maintained.