GIS

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Presentation of georeferenced data sets from the North Atlantic with Google Maps found through searching for sediment

Vizualisation of georeferenced data in Pangaea through GIS (Geographical Information System) functionality is enabled by using Google Earth. Looking for data with Pangaea search presents a list of hits.

  • Pressing the button <Show Map> will open a Google Earth map with locations of data sets. The standard map features (upper left) allow to turn the map or zoom. <Shift/click/drag> allows to zoom into the map. While increasing the scale by zooming into a certain area, more data points will be shown. At any scale a maximum of 300 events is shown (first 300 in result list).
  • Clicking on a mark will show the data citation with a DOI-link to the data set.
  • A legend (lower right) explains the meaning of marks which distinguish between published (yellow)/available (red) data sets and data from one location or distributed through several locations. A detailed explaination is given by hoovering with the pointer above the mark of interest.
  • Uncheck Show labels to remove names and borders of countries.
  • The map will show locations only, if an event information is related to the data set
    • one placemark per event
    • no map for georeferenced data with event label not_given)
    • if a data set contains too many events, the map may not be shown.
    • track data is an exception: one event with start/end and lat/long/date/time configured in the data set.

To change the projection it is recommended use the Google Earth function which will download a *.kml file.

Starting from the result list in Pangaea search again and pressing the <Google Earth> button will save the georeferenced results in a kml-file. Provided that google earth is installed on the users computer, a click on the kml-file will oben the georeferenced data points in Google Earth.

GIS via ESRI

A project specific GIS was designed at the JUB (Jacobs University of Bremen) for the EU-project HERMES based on the ESRI MapServer. Locations of data from the study area Black Sea were converted to shape files including a dynamic query to data sets related to the specific location (event).

Links

First version

The first visualization of data was established through a mapserver by using the open source UMN MapServer. To navigate in collections of large files, e.g. from geophysics or bathymetry, the Pangaea Internet Mapper enabled a georeferenced view on the Pangaea content. Data sets were converted to shape files and are used as static elements in the maps with dynamic links to the data.