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The toolbar provides the controls for displaying the spatial information via through the following buttons. The functionality of zoom options and layers is explained in the FEWS Explorer section (see chapter 2).
Button | Description |
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| Contours. To turn on/off |
| contour lines |
| . Numbers appear when the animation has stopped or paused. The colors, which indicate |
| the value remain visible. A bilinear interpolation is used to smooth the grid. This is needed to calculate the contours. When the labels and Contour lines are switched off the smooth grid is still visible. The bilinear interpolation is only applied to the cells of the grid that are rectangular and are not rotated (too far) 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. Toggles labels on or off (drop down options include turning on/off locations, values and/or units in the labels and increasing /decreasing the number of decimals shown in the labels and tooltips) |
| Since FEWS 2022.02 this also work for grids, but only when zooming in till there are less than 20000 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
Since 2019.02 the time slider and its buttons have been moved to a separate toolbar located at the bottom of the spatial display.
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Play. Starts continuous play mode. The slider will indicate the time slice being shown.
Pause. Stops continuous play mode. The time slider remains at the time displayed at the moment.
Stop. Stops continuous play mode. The time reverts back to the start time.
One frame back. Moves the time slider back one timestep.
| Preload. Since the 2019.02 the grids are downloaded on the fly. With the preload button the grids for all time steps are downloaded in the background to have a smooth animation without pauzes. A green line in the time slider shows the progress of the download | |||
| 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. Creates an AVI or animated gif movie file. The avi format is used by default unless the filename ends with '.gif'. After opening the file, the display will start playing from the current time position, until the stop button is clicked. | ||
Time slider | The time slider can be dragged to specific time slice. | ||
Data availability | The data availability indicator provides a visual clue as to where you can find data. For those times where data is available, the colour of the data availability indicator will be set to the maximum value found in the data for that time slice.
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Selection filters
The selection filters show which displays have been configured. Select a filter to display the data. Note that each grid display may be configured differently, i.e. with a different period of data to be displayed, with a different background map, etc. The configuration allows filters to be highlighted in bold.
Legend
Locations attribute filter
With the location attribute filters you can hide one or more locations/grids in the plot. The 
button is only visilbe then attribtes are configured for the plot
Legend
The legend can be shown as table legend or as bar legend. The legend The legend can be shown as table legend or as bar legend. The legend identifies the color used for each range of values. The range of values used for each color can be rescaled by right clicking on the display and selecting 'Rescale Classification' from the pop-up menu. The display colors will be updated to reflect the new classification. After rescaling, the lowest and highest values in the legend will correspond to the minimum and maximum values of the data in the current zoom extent of the display (for the selected time slice). When the display is zoomed in on an area where all data points or grid cells have similar colors, rescaling can be used to see more clearly the differences in the data values. To return to the default classification right click on the display and select 'Back To Default Classification' from the pop-up menu. When selecting a different plot, the classification always changes back to the default classification for that plot.
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A bar legend displays fluent scale bar as shown in the picture below:
Moving Average or Accumulation Slider
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Both the selected grid plot and the selected aggregation time step are stored in the user settings when closing. When reopening FEWS the same aggregation time step will be selected. When an aggregation time step has been selected and the user switches between different plots, FEWS will attempt to select the same time step again for the new plot.
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
Last Value Checkbox
When selected this checkbox shows the last available of time series configured in the grid plot. This can be useful when multiple timeseries with a different or non equidistant time step are defined within one grid plot and a time is selected where one time series does not have a time step. The time series can be scalar or grid. For scalars the last time step (that is still within the visible period) that does not have a missing value is shown, but for grids just the last time step is shown even though it can be a missing value. The checkbox will only appear when no accumulation or moving average slider has been configured, and can be hidden via configuration. The next screenshots show how data with a daily time step will appear at 22:00 even though it is not defined for that time:
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The ensemble member is specified at the bottom of the thumbnail and on 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 be show when hoovering over that corner.The size will be stoed in the user settings afterwardscan be resized at the bottom right corner of the first thumbnail, a resize mouse cursor will be show when hoovering over that corner.
The size will be stoed in the user settings afterwards.
Contours
The contour button calculates contours on the fly for the displayed grids. Since 2021.01 showing contours also works for irregular grids and over multiple grids displayed as the same time. When the contour button is pressed bilinear interpolation is used to calculate a value for every pixel individually. The grid cell for every pixel at the current map extent and zoom level is known by the grid display. The neighbor cell detection is done at screen pixel level and works for existing configurations. The interpolation is automatically switched off for individual cells that are not rectangular or 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.
Extracting data from the Spatial Display
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Note:
Extraction of scalar time series is not available for rotated pole geodatum types. In some cases extraction of scalar time series can exhibit unexpected behaviour near the North Pole or South Pole.Pole.
Extracting scalar time series for each ensemble member at one from grid
Since the 2020.01 it is possible to show the scalar time series for each ensemble member for a single grid cell.
Extracting vertical profiles from 3D data
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When spatial modifier mode is activated, the spatial modifier button section will appear in the toolbar. This contains the following buttons.
Button | Description |
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| Start time. Select the current time as new modifier start time. |
| End time. Select the current time as new modifier end time. |
| Clear period. Clear the selected new modifier period. |
| Copy modifier. Used when creating spatial copy modifiers. |
| Paste modifier. Used when creating spatial copy modifiers. |
| Spatial profile. Used to create a spatial profile modifier. |
When spatial modifier mode is activated the colors on the time slider will indicate the time periods on which modifiers are applied and the selected period for new modifiers (if any). The new modifier period will be shown in green. The color for the time steps on which a spatial modifier is active can be configured. In this example the configured color is black. It is also possible to configure ticks for the start and end time of the period of applied modifiers and start and end time of the selected new modifier period.
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The display time in the spatial display can be changed in the standalone system onlyan Operator Client and in a Stand Alone system. The use is similar to the setting the display time in the data display, but with less modification possibilities. When the display time is modified, the relative start and end times of the data to be shown are reset and the time slider is adjusted accordingly.
When pressing the <Save> button in the pop-up, the changes made to the display time are stored in the user_settings.ini. Next time the FEWS system is started these 'non-default' settings will be used. To revert back to the default display period, press the <Reset> button and press <Save> again.
