4.1 Data visualization with the Web GIS

The results of WP1:Ground Deformation can be visualised in five layers:

IBIS phase image

Shows the wrapped interferogram in unit [rad] as observed with IBIS-L.

IBIS displacement image

Shows the displacements in line of sight in unit [mm]. It is computed from the interferogram by applying an atmospheric correction using a set of coherent points and estimating meteoreological parameters.

IBIS coherence image

Shows the coherence. High coherence (near 1) means good quality.

GPS Station network

Gives an overview of the GPS station network. Shows the actual activity of the GPS-receivers, lists the implemented instruments at each station and shows the station coordinates at epoch 0.

GPS data

Shows for a given time:

- absolute horizontal and vertical displacement with respect to epoch 0 (= start of the GPS-measurements),

- relative horizontal and vertical displacement with respect to the previous epoch,

- time-series of the absolute displacements.