Fig. 1. Basic schematic diagram of D-InSAR

Fig. 2. Flow chart of PS-InSAR technology

Fig. 3. Schematic diagram of relationship between image range and pipeline position. (a) Relationship between image range of ascending orbit and pipeline position; (b) relationship between image range of descending orbit and pipeline position

Fig. 4. Histograms of average annual deformation rate of PS points of ascending and descending orbits. (a) Ascending orbit; (b) descending orbit

Fig. 5. Deformation distribution maps of PS points of Sino-Myanmar natural gas pipeline—Rakayama section. (a) Deformation distribution map of PS points of ascending orbit; (b) deformation distribution map of PS points of descending orbit

Fig. 6. Distributions of surface deformation results based on image fitting of ascending and descending orbits. (a) Based on ascending orbit; (b) based on descending orbit

Fig. 7. Vertical deformation results obtained based on fusion of ascending and descending orbits

Fig. 8. Distribution map of local deformation abnormal area

Fig. 9. Results of multi-source data information acquisition in study area. (a) Slope data information; (b) aspect data information; (c) information on the shortest distance from the road; (d) information on the shortest distance from the river; (e) soil type information; (f) vegetation coverage information

Fig. 10. Distribution map of landslide risk area

Fig. 11. Distribution map of first and second landslide risk areas. (a) Distribution map of landslide first-level risk area; (b) distribution map of landslide secondary risk area

Fig. 12. Distribution of pipeline risk areas

Fig. 13. Distribution of first and second pipeline risk areas. (a) Distribution map of pipeline first-level risk area; (b) distribution map of pipeline secondary risk area

Table 1. Ascending orbit image information

Table 2. Descending orbit image information