Overview
The Point Data Plot Control displays a set of observations using a station model.
This control is accessed by selecting the Point Data field and the Point Data Plot display. The control window consists of four tabs: Layout, Times, Plot, and Filters.
The Layout tab allows you to control
basics of the display:
Image 1: Layout Tab of the Point Data Plot Controls Dialog
Properties
- Declutter - Displays only stations that do not overlap. When unchecked, all of the stations will be shown. The small "lock" icon allows you to
lock the stations that are currently being displayed and not have their
display changed when navigating in the Main Display window.
- Density - Changes how dense the display of stations is in the Main Display window
when the decluttering option is selected. This option will not be available if the decluttering option is not selected, as all of the stations will then be displayed.
- Layout Model - Changes what layout the data will display in. Click on the downward facing blue arrows to change the layout model. Selecting Edit will open the Station Model
Editor which will allow you to create your own custom station model.
- Scale - Sets the size of the layout model displayed in the Main Display window.
- Line Width - Sets the thickness of the layout model displayed in the Main Display window.
- Vertical Position - Sets the vertical positioning of the layout model with respect to other variables being displayed. The Altitude option will set the vertical position of the layout models based off of the stations' altitudes (if this information is available through the data source). The Fixed Position option will uniformly set a fixed vertical position for each layout model regardless of altitude. The value for a fixed position can be set using the slider or entering a value into the field and pressing Enter.
The Times tab allows you to change the observation times that are shown in the display. By default, data for a single time corresponding to the current animation time will be shown.
Using this widget allows you to show multiple times at once:
Image 2: Times Tab of the Point Data Plot Controls Dialog
Clicking opens a menu that allows you to select specific start and end times:
Image 3: Time Settings Dialog
Properties
- Show - Displays the data on individual frames in the Main Display window with respect to the time of the data, or plots all of the data on every frame regardless of the time of the data.
- Range - Changes the initial and final date and time to display in your loop.
- Declutter - Subsets the data that is being displayed by
only showing every N minutes. This is generally not useful for observation data (e.g., station data). However, for observation data that contains
many times (e.g., airplane track data), you can use this field to subset
the times. Selecting the enabled checkbox allows you to set a number of minutes.
- Note: If you are displaying point data that has a large number of times,
you will be prompted whether you want to view all of the times.
The Plot tab provides a time series chart and a data readout table of a selected
station. To use this, left-click on a station in the main display. Double click or right click and select Add To Chart on a table row to add it
to the time series chart. See the Charts page for more information
about customizing the chart:
Image 4: Plot Tab of the Point Data Plot Controls Dialog
Properties
- Station - Shows the station for which the data is being displayed. This can be changed by left-clicking on a different station model in the Main Display window.
- Field - Lists the different fields available from your data source that you can select from to display in the plot.
- Value - Lists the numerical value of the property at the
time selected.
The Filters tab allows you to set individual or multiple filters to specify which data are shown in the Main Display window:
Image 5: Filters Tab of the Point Data Plot Controls Dialog
Properties
- - Applies any set filters to the data displayed in the Main Display window.
- Filters Enabled - Enables filters to be applied to the data in the Main Display window.
- Match all of the filters - Displays only station models that correspond with every chosen filter.
- Match any of the filters - Displays any station models that correspond with one or more of the chosen filters.
- Property - Represents the variable or property that you want to filter.
- Middle Dropdown Menu - Represents the mathematical symbol that determines your filter. This can be greater than, less than, equal to, not equal to, etc.
- Value - Specifies the numerical value that the mathematical symbol in the middle dropdown menu will utilize.
As an example, the above image
shows two filter expressions, one that states the Temperature field needs
to be greater that 35 F and the other states that the Wind Speed value needs
to be greater than 15. The unit of [F] is entered for the Temperature field. If you do not define a unit after the value, then McIDAS-V will utilize the native unit for the Property. Match all of the filters is selected, meaning only station models where the Temperature is greater than 35 degrees F and the wind speed is greater than 15 will be displayed.
Menus
Many of the menu items seen utilizing this display are standard options that can be found in the Menus section of the Layer Controls Page. However, there are some options that are unique to this display.
The File menu has these unique options:
- Save Chart Image... - Saves an image of the chart produced in the Plot tab.
- Export to KMZ... - Exports the data in the (*.kmz) format.
- Export Selected Observation... - Exports the data in the Comma-Separated Values (*.csv) format.
The Edit menu has this unique option:
- Layout Model... - Opens the Station Model
Editor which will allow you to create your own custom station model.
The View menu has these unique options:
- Use Projection From Observations - Re-centers the display and resets the zoom level back to the display's initial settings without changing any other preferences you have modified.
- Chart - Allows you to display a thumbnail of the chart in the Legend, change the Grid Layout, zoom in and out, save the chart, and open the Plot Properties window.
- Show Raw Data - Displays the data in its raw format in the Value menu of the Plot
tab before any rounding/formatting is done to the data by McIDAS-V.