How to access Syke’s datasets with WMS?

How to access Syke’s datasets with WMS?

The datasets produced by Syke’s Earth Observation are available via WMS-service. These examples are done with QGIS. Adding the data consist of following steps:

Connecting to the WMS-geoserver

Opening the Data Source Manager’s WMS-section

When using the WMS for the first time, click the “New”-box to configurate the WMS-connection. If you have already created the connection, click the “Connect”-box.

WMS-server configuration. Choose the arbitaty name and copy the wms-address as URL: https://geoserver2.ymparisto.fi/geoserver/eo/wms

Adding the data to the project

There are a lot of datasets available for visualization purposes on the geoserver. These datasets are Syke’s interpretations from satellite observations and should be cited according to Syke’s citation policies. For example there are daily interpretations of:

  • Sea surface temperature (SST)
  • Secchi depth (SDT)
  • Blue-green algae (ALGAE)
  • Turbidity (TURB)

Also there are seasonal aggregates and composites of turbidity, blue-green algae, and chlorophyll-a.

Adding the data to the project. Repeat with another dataset to add more layer to the project.

Selecting date

The date of data visible on the layer in daily interpretation datasets can be adjusted with the following method:

  • Double-click the layer to open the layer properties
  • Open the “Temporal”-selection
  • Untick “Dynamic Temporal Control”
  • Modify the dates for your choice with start and end dates
    • By default the “Match to Start of Range” option is selected which means the visible layer is the Start date
      • If there is no data visible, try changing the Time slice mode to “Closest Match to Start of Range”
    • You can also view multiple intrepretations of the same layer simultaneously by adjusting the “Time slice mode” to “Use Whole Temporal Range”
    • If you use the whole temporal range, be sure to select only short period of time (maximum 1-2 weeks) or the geoserver might overload and crash

Similar approach can be used with other dataset with temporal coverage. The aggregates and composites are limited to single static view.

Selecting the date. Note that “Time slice mode” is set to “Match to Start of Range” and so the dataset visible is the interpretation of Start date.