Figure 1 | Scientific Reports

Figure 1

From: Detecting differential ground displacements of civil structures in fast-subsiding metropolises with interferometric SAR and band-pass filtering

Figure 1

Mexico City’s geotechnical and subsidence context. (a–d) Examples of infrastructure subjected to differential displacements (locations in e). (a) Over-compensated column supporting Metro railways causing apparent uplift inside a Metro station (note the uneven floor). (b) Tilted floor inside the Metropolitan Cathedral. (c) Tilted tower of Santa Teresa la Antigua Alternative Art Center in UNESCOS’s world heritage site of Mexico City’s downtown. (d) Dislocated and displaced portion of ex-Hacienda de Xico’s barn. (e) Geotechnical zones8 and locations of subsidence-related cracks/faults9. Inset map shows the location of Mexico City in central Mexico. (f) InSAR-derived vertical velocities calculated from 21 X-band COSMO-SkyMed SAR scenes. Black lines and points mark locations discussed in the text. Black frame marks the calibration area mentioned in “Methods” section and in Fig. 2c–f. Pink and purple polygons correspond to the limits of the lake and hills geotechnical zones displayed in (e). Location map created using Google Earth Pro 7.3 (https://www.google.com/intl/en/earth). Satellite imagery credits: INEGI, Google, US Dept of State Geographer, Data SIO, NOAA, US Navy, NGA, GEBCO. ArcMap 10.2 (https://www.esri.com/software/arcgis) was used to produce the shaded relief map from SRTM data (https://earthexplorer.usgs.gov) and to compose the maps.

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