GSI HOME > Geodetic survey > Crustal Movement in Japan > How to use  

How to use

γ€€In this page, you can see and download 3 kinds of information on crustal movement.
γ€€Fluctuation Vector---Display movement of the position of GNSS control points for the past 1 year (or 1 month) in vector format.
γ€€Coordinate Change---Display the change of coordinates of GNSS-based control points in time series graph.
γ€€Baseline Change---Display the change of baseline length between two GNSS-based control points that you select in time series graph.
If you click the Guidebutton in this program after you change "subject" menu, each corresponding "How to use" window will be displayed.
Selection menu of deformation information  fig. Selection menu of Deformation Information.("subject")
Notice
Observation data might indicate anomalous large value irrelevant to crustal deformation due to bad conditions such as poor reception of GNSS signal. Be sure to check amount of deformation of several GNSS points around the anomalous point before you use these data. Data might not be displayed if an error is too big or no observation data available.

How to use "Displacement Vector"

  • To change subject, region, period, and scale, select them from the right menu.
  • To display a station name and code, put the cursor on the point.
  • To display a vector length, click the point.
  • To change horizontal or vertical components, select the "DIRECTION" radio button.
    direction
  • To change the vector scale, select "SCALE" menu and choose scale.
    scale
  • To fix other observation station, select "New" in the "FIXED STATION SELECTION" menu.
    fixed station selection
    Then click update button, new displacement vector map will be displayed.
    To display initial vector map , select "Default" and click update button.
  • To download numeric files of vector data, click download button.
  • To download kml files of vector data, click download button.

How to use "Coordinate Change Graph"

  • To change subject, district and period, select them from the right menu.
  • To display a station name and code, put the cursor on the point.
  • To add an observation point, click the point on the map. (Selection is possible up to 5 points)
  • To display coordinates change graph, click to graph button, after you select observation points. (New window will be opened)
  • To cancel a selected point in the list box, select the station name in the "Output Observation Stations" box and click cancel button.
  • To cancel a selected point on the map, click clear button.
  • To display a graph for other points, select one from the above pull-down menu.
  • To download numeric file of coordinates change graph, click download button.

How to use the Baseline Variation Graph

  • To change subject, district and period, select them from the right menu.
  • To select a baseline, click beginning and end point on the map. Selected baselines are added in the list box.
  • To display baseline variation graph, click to graph button, after you select baseline.(New window will be opened)
  • To cancel a selected baseline in the list box, select the baseline and click cancel button.
  • To cancel a selected point on the map, click clear button.
  • To display a station name and code, put the cursor on the point.
  • To display a graph for other baselines, select one from the above pull-down menu.
  • To download numeric files of baseline length variation graph, click download button.

Go to top