We can access this feature EEMS provides access to a number of online data sources that can be used to automatically populate time series. These should be used with care and we do not guarantee the quality of the data. Access to this feature is provided from the Tools menu, select and selecting Download Online Data. Then there There are three sub-options: Model Open Boundary Conditions, Tidal Level for Model Boundaries, and Tidal Harmonics for Station as shown in Download Online Data (new).
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Model Open Boundary Conditions
This feature allows getting you to obtain online data for the existing open boundary of the model. The available data from online this source can be is of the following data types:
- Water surface elevation
- Water salinity
- Water temperature
Suppose that we have In the case of a model with that has an existing open boundary. Open , open the 2DH View, turn on the light in the Boundaries layer of the Layer Control to show the boundaries of the model as shown in Download Online Data (new). The purpose of this is to view where is This displays the locations of the open boundary.
Next, go to Tools menu, then select Download Online Data / Model Open Boundary Conditions, the form of and Download Online Data for Open Boundaries will form will be displayed as shown in Download Online Data (new).
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Figure 3. Download Online Data for Open Boundaries form.
Some of the options provided include:
Boundary: click the drop-down arrow; boundaries will show; select a boundary we want to download data
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Tidal Level for Model Boundaries
Suppose Another kind of data is the tidal level. In case we want to get access the tidal level for some cells that we want to assign as an at the open boundary, take the following the steps below.:
- Turn on the light of the Boundaries in the Layer Control, and activate mouse selection mode.
- Open the 2DH View
- Left mouse click LMC on cells to select as shown in Download Online Data (new)
- Go to Tools / Download Online Data / Tidal Level for Model Boundary
The Download Harmonics form will show up be displayed as shown in Download Online Data (new)
List of Location: This contains the I and J index of the selected cells
Selected Location
Name: Show Displays the I and J index of the selected cell from the List of LocationLocations.
Longitude and Latitude: coordinate of the selected cell's centroid
Add: We need to enter Enter information for a new cell we want to add, including Namename, Longitudelongitude, and Latitudelatitude, then click the Add button to add more cells to the List of LocationLocations.
Remove: Select a cell from the List of LocationLocations then click Remove button will to delete that cell from the list.
Update: When we change information of the selected cell (e.g. Longitude longitude or Latitudelatitude), then click the Update button to update the information of the cell.
Time Shift (hours): The phase lag of the harmonic constants is referred to as zero UTC, so we it may need be necessary to change shift the time shift to adjust for the model's local time.
Get Data: Once everything is ready, click the Get Data button to download the harmonics. As a result, a table in the form is filled for fields of harmonic data. EE will populate a table fields including ID, Name, Speed, Amplitude, and Phase, as shown in Figure 6. At this time, the The OK button is enabled, click will now be enabled. Click the OK button so that tidal time series of the selected three cells will be are added to Water Level in External Forcings Data. These time series can be used to assign to open boundaries when needed.
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Import: Click this button to load the harmonics file from the an external drivefile. When clicking this button, an the Open form will pop up as shown in Download Online Data (new), select Figure 8. Select the file, then click Open button to load the harmonics file.
Export: Click this button to save the harmonics of cells to a file. When clicking this button, an the Save As form will pop up as shown in Download Online Data (new), select the data type in Save As type, then enter a the file name, then select the Save button to export the harmonics file
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Tidal Harmonics for Station
Suppose that In some cases we have a station that has coordinates . Now we and want to get the harmonic constants for that station. The feature steps described below will allow us to do this.
Go to Tools menu, then select Download Online Data / Tidal Harmonics for Station, the form of Download Online Data for Open Boundaries will be displayed as Download Online Data (new). Now we enter Enter the station 's information into the form as Name (e.g., Station_01), Longitude, and Latitude and then click the Add button to add the station into the List of Locations as shown in Download Online Data (new).
Next, click the Get Data button to download harmonics constants for that station. Once the download process is completed, a table in the form is filled for fields of ID, Name, Speed, Amplitude, and Phase, as shown in Download Online Data (new). click Click the Export button to save the harmonics of the station to a file. The section above section describes how to save the station's harmonics to a file.
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