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The toolbar offers controls for presenting the spatial information through various buttons. The functionality of zoom options and layers is detailed in the FEWS Explorer section. (see chapter 2).
Button | Description |
|---|---|
| Contours. You can turn contour lines on or off. Numbers show up when the animation is stopped or paused. The colors, which show the value, stay visible. A bilinear interpolation is used to make the grid smooth. This is necessary for calculating the contours. Even when the labels and contour lines are turned off, the smooth grid can still be seen. The bilinear interpolation is only used on the cells of the grid that are rectangular and aren’t rotated too much compared to the screen orientation. |
| Grid lines. Toggles grid or polygon lines on or off |
| Product Info. Toggles product info on or off. (only shown if there are products present in the configuration, see the page on the Forecast Product Information Panel) |
| Labels. You can toggle labels on or off. The drop-down options include turning locations, values, and/or units in the labels on or off, and increasing or decreasing the number of decimals shown in the labels and tooltips. Since FEWS 2022.02, this also works for grids, but only when you zoom in until there are fewer than 20,000 grid cells displayed and one of the cells is larger than 10 pixels. |
| Value to local reference level. |
| Flags. Switches to flags for selected time series / gridplot (quality, modifiers or thresholds) |
| Search and select forecasts. Switches to (previous) forecasts. |
| Show spatial thumbnails. Toggles thumbnails of each time step below the main spatial display on or off. |
| Show spatial ensemble thumbnails. Displays the ensemble thumbnails panel. |
| Sketch mode buttons and other sketch drawing options. Switches the sketch mode between drawing points, adding points, drawing longitudinal profiles and drawing areas when the map is clicked. Contains additional options to save/load sketches and delete the current sketch. |
| Options to show a graph based on current sketch. Drop-down menu with options to extract scalar time series, vertical profiles, longitudinal profiles, 2D longitudinal profiles, calculate budget and calculating the mean max min time series (for sketched areas). |
| Activate spatial modifier mode. Toggles spatial modifier mode on or off (only shown if at least one spatial modifier is configured in ModifierTypes.xml). The additional modifier mode buttons shown when modifier mode is toggled on are explained in the spatial modifier section. |
| Display time. Choose display time (period) |
| Attributes. |
Time Slider Toolbar
The time slider and its buttons have been moved to a separate toolbar located at the bottom of the spatial display.
| Preload. The preload button allows the grids for all time steps to be downloaded in the background. This ensures a smooth animation without pauses. The progress of the download is indicated by a green line on the time slider. | ||
| Play. Starts continuous play mode. The slider will indicate the time slice being shown. This button is merged with the pause button. So after this button is pressed, the pause button appears. | ||
| Pause. Stops continuous play mode. The time slider remains at the time displayed at the moment. This button appears if the play button is previously pressed and the continuous play mode is running. | ||
| One frame back. Moves the time slider back one timestep. | ||
| One frame forward. Moves the time slider forwards one timestep. | ||
| Record. This function creates a movie file in AVI or animated GIF format. By default, the AVI format is used unless the filename ends with ‘.gif’. Once the file is opened, the display will start playing from the current time position and will continue until the stop button is clicked. | ||
| Time Slider | The time slider can be dragged to specific time slice. | ||
Data availability | The data availability indicator gives a visual hint about where data can be found. When data is available, the color of the data availability indicator will match the highest value found in the data for that time slice.
|
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With the location attribute filters, you can hide one or more locations/grids in the plot. The button ( 
) is only visible when attributes are configured for the plot.
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The legend can be displayed as a table or a bar. It identifies the color associated with each range of values. You can rescale the range of values for each color by right-clicking on the display and choosing ‘Rescale Classification’ from the pop-up menu. The display colors will then be updated to match the new classification. After rescaling, the lowest and highest values in the legend will match the minimum and maximum values of the data in the current zoom extent of the display (for the selected time slice). If you zoom in on an area where all data points or grid cells have similar colors, you can use rescaling to better see the differences in data values. To go back to the default classification, right-click on the display and choose ‘Back To Default Classification’ from the pop-up menu. When you select a different plot, the classification always reverts back to the default for that plot.
Users can change the classification colors by double-clicking the colored squares in the table legend. These changes are saved in the user settings. If a user has made changes, they can discard them by right-clicking the display and selecting ‘Discard User-Defined Classification Colors’.
When multiple classifications are set up, users can select a classification from the drop-down menu located directly above the table legend.
A bar legend displays fluent scale bar as shown in the picture below:
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The moving average slider can be set up to let the user choose from a number of moving average settings. Each moving average window is then recalculated for the whole period.
When you close the program, both the selected grid plot and the chosen aggregation time step are saved in the user settings. When you reopen FEWS, the same aggregation time step will be selected. If you’ve selected an aggregation time step and then switch between different plots, FEWS will try to select the same time step again for the new plot. In the image below, the Moving Accumulation Slider is set to 1 day.
Since the 2023.02 the accumulation slider automatically contains an extra tick at the end of the slider do accumulate the time steps to/from the display time
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A “search and select forecast” (
) button is available. This button becomes active if more than one forecast is available, meaning there are multiple forecast time series with different forecast times in the database and the <numberOfRecentForecasts> is set to more than 1 for the selected grid plot. Clicking the button allows you to cycle through the available forecasts. The drop-down menu will display the forecast times of the available forecasts, and selecting one of these times will change the displayed forecast to the one selected.
Alternatively, you can use the spatial thumbnails to select different forecasts (and different time steps). The spatial thumbnails panel will display one row for each available forecast. You can toggle this panel on or off using the button (
).
Selecting different ensemble members
The button (
) can be used to open the spatial ensemble thumbnails panel.
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The spatial ensemble thumbnails window will open, displaying a thumbnail for each individual ensemble member at the selected time.
In this window, users can choose the ensemble thumbnail they want to view. This selected ensemble member will then be visualized in the grid display.
The ensemble member is identified at the bottom of the thumbnail and in the bottom right corner of the grid display.
The thumbnails can be resized at the bottom right corner of the first thumbnail. A resize mouse cursor will appear when hovering over that corner.
The size will be stored in the user settings for future use.
Contours
The contour button generates contours in real-time for the grids being displayed. Since 2021.01, it’s also possible to show contours for irregular grids and across multiple grids displayed simultaneously. When the contour button is pressed, bilinear interpolation is used to calculate a value for each pixel individually. The grid display knows the grid cell for every pixel at the current map extent and zoom level. The detection of neighboring cells is done at the screen pixel level and works for existing configurations. The interpolation is automatically turned off for individual cells that are not rectangular or are rotated more than 10 degrees compared to the screen. The contours are calculated for the interpolated pixel values for the current zoom extent. The contour button is disabled for point data and when contours are configured for a different parameter on top of the parameter that is using the colors from the legend.
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| Info | ||
|---|---|---|
| ||
In 2019.02 the options to extract data from the spatial display were moved from the right-click menu of the map to the drop-down menu of a new |
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Extracting scalar time series from grid
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You can extract scalar time series
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from the grid by double-clicking on the point of interest. Depending on the type of data
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displayed, the scalar time series will
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correspond to
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a point, polygon, or grid cell.
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Here’s another way to do it:
- First, select the point of interest by left-clicking. A colored dot will
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- appear to
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- mark the selected point. For grid data, an additional green dot will be drawn to indicate the center of the selected grid cell (you may need to zoom in to see the green dot
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- if it overlaps with the colored dot
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- ).
- Extract the time series for the selected point either by selecting
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- ‘Show Time
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- Series’ from the drop-down menu of
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- the (
)button or by using the Ctrl+F3 shortcut.
Instead of immediately extracting the time series and showing the a time series dialog, you can use the "Copy “Copy Time Series" Series” option can be used to copy the time series for the selected point to the FEWS clipboard. Copied time series can then later be pasted in into a time series dialog through later using the paste button in its tool bartoolbar.
Several points can be drawing You can draw several points by selecting the "Add Point" sketch mode 
“Add Point” sketch mode through the sketch mode button (
) or by holding the left ctrl and shift buttons while left-clicking on the points of interest. When several points have been drawn, the "Show time Series" and "Copy Time Series" “Show Time Series” and “Copy Time Series” options will show /or copy separate time series for each of the drawn points.
Instead of manually drawing a point / or points, you can use the 'Show ‘Show Time Series For Coordinates...' Coordinates…’ option in the drop-down menu of the 
button can be used (shortcut: Ctrl+Shift+F3) which the () button. This will open a small dialog prompting the user you to enter the coordinates of the point they you wish to use.
A series , that is extracted from a grid , is not related to a known location or polygon ID. The series will then be identified using the grid coordinates.
The graph will automatically pop up with the time series of the selected point, polygon, or grid cell. When animating the grid display, a marker will move over the time series graph as well.
To extract a different scalar time series, double-click on another point of interest. This will draw a new dot and extract a scalar time series for that point. Please be aware note that when extracting a scalar time series from a data point in the display, then the dot drawn on top of the data point has a different colour color from the point itself. This way might make it may look like the data point has a different color because of the dot. The dot can be erased by selecting 'Delete Points' ‘Delete Points’ in the drop-down menu of the sketch mode button (or using the keyboard shortcut Ctrl+Delete).
Note:
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It’s important to stop the grid movie before
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creating a time series graph
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. Running both at the same time can slow down the system
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due to the heavy processing load from executing multiple processes simultaneously.
The extraction
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of scalar time series is not available for rotated pole geodatum types. In some cases, the extraction of scalar time series
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may behave unexpectedly near the North Pole or South Pole.
Extracting scalar time series for each ensemble member at one from grid
Since Since the 2020.01 it is version, it’s possible to show display the scalar time series for each ensemble member for a single grid cell.
Extracting vertical profiles from 3D data
When the spatial display is
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presenting 3D (layered) data, you can extract a vertical profile
...
. Here’s how:
- Draw a point as described in the previous
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- section.
- Then,
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- select the
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- ‘Show Vertical
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- Profile’ option in the drop-down menu of the
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- button or press Ctrl+
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- F4. This will open a time series dialog with the vertical profile for the drawn point.
Alternatively, you can use the ‘Show Alternatively a 'Show Vertical Profile For Coordinates...' option is available Coordinates…’ option in the drop-down menu or by pressing press Ctrl+Shift+F4. The vertical profile will be shown as a line graph of the parameter versus the water depth. One
You can also create a vertical profile with a color map by selecting the 'Use Color Map' :
- Select the ‘Use Color Map’ option in the drop-down menu of
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- the button or use Ctrl-M.
- The vertical profile will then be
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- displayed as a graph of
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- a parameter over time, with the colors in the plot indicating the values of the selected parameter.
Extracting longitudinal profiles (Xsections) from a grid time series
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Once a profile sketch has been drawn, extract the profile either by selecting 'Show Longitudinal Profile' from the drop-down menu of the 
button or by using the Ctrl+F2 shortcut. The graph of the profile will show automatically.
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