2.3. Data Visualization

2.3.1. Display Window

Display window

Scroll Bars

There are three scroll bars located on the 2Dviewer. These scroll bars can be used to adjust what is seen in the viewer.

• Left Scroll Bar
  The scroll bar located on the left side of the viewer can be used to zoom in and out. Sliding the scroll bar up, zooms out from the center, and sliding the scroll bar down has the opposite effect

• Bottom Scroll Bar
  The scroll bar located on the bottom of the viewer can be used to pan to the right or left. Sliding the scroll bar left, causes the display to pan to the left. Sliding the scroll bar to the right causes the display to pan to the right.

• Right Scroll Bar
  The scroll bar located on the right hand side of the viewer can be used to pan up and down. Sliding the scroll bar up, causes the display to pan upward. Sliding the scroll bar down causes the display to pan downward.

Display Buttons

Draw

Full-extent

Layer-extent

Screen Grab

• Draw
  The Draw button causes the display window to be redrawn. This is often necessary in order to update the dislay after turning on or off functions or data layers. The screen does not update until the user clicks this button.

• Full-extent
  The full-extent button sets the display area such that all of the open data objects can drawn in their entirety within the display window. This can be of use when it is necessary to view all of the data at one time. It also makes a handy default extent to fall back on if the exact location of the cursor within the data is no longer known.

• Layer-extent
  The Layer-extent button sets the display area to the maximum extent of the highlighted data object in the Active Data list. This is useful when it is desired to see the entire extent of the data layer currently being edited.

• Screen-grab
  

  The Screen-grab tool is not available in this version of RiverGIS.

Manipulation Buttons

Magnify

Pull

Pointer

Graticule

• Magnify
  The Magnify tool is used to define the displayed area in the 2DViewer. When the Magnify checkbox is highlighted the mouse can be used to define a rectangle in the 2DViewer, which will become the new extent for the display window. To produce the rectangle, move the mouse in the display window to the location for the upper left corner. Press the left or right mouse button and drag until the box encloses the desired area. When the mouse button is released the rectangle will remain displayed in the viewer. If the desired area is not within the rectangle, it can be removed by clicking the left mouse button, and then a new rectangle can be produced. When the desired area is within the rectangle, click the right mouse button and the screen will be redrawn with this extent.

• Pull
  The Pull tool is used to pan within the 2Dviewer in any direction. When the Pull checkbox is highlighted any mouse button can used to choose the point which is to be pulled to a new location. With the mouse over the location, press any button and drag to the new location. When the mouse button is released the display will redraw. The location in the data where the mouse button was first pressed is now located where the button was released. It can be thought of as attaching a rubber band to the first location and pulling to a new location.

• Pointer
  When the pointer checkbox is highlighted the selection icon in the 2Dviewer is displayed as the cross-hair. When any mouse button is pressed a window pops up to display information about that particular location of the the currently highlighted data object in the Active Data list.
  In order to edit networks the pointer checkbox must be enabled.

• Graticule
  When this button is enabled, a graticule is displayed over the data displayed in the 2Dviewer. The resolution of the boxes is determined by the resolution of the data being displayed and the current extent of the display.

2.3.2. Table Window

Some table manipulations are controlled from the RiverGIS control panel. In order to select records in a table the dataset must be active and the selection toggle must be set for single or multiple selections.

Table Window

Selection Buttons

Load Selection	Save Selection
Clear selections	Reverse selections
Idle selections	Idle reverse

• Load Selection
  Loads saved selection group

• Save Selection
  Writes out file with selection values (use to work wit category fields)

• ClearSelections
  Clears all selections made in table

• Reverse Selections
  Reverses selections in table - all selected records are unselected and all unselected records become the selected records

• Idle Selections
  Makes the selected records idle, these records are not effected by calculations or plotted in xy plots

• Idle Reverse
  Makes all of the idle items selected and all records active

Sort Options

The table can be sorted by field by left clicking on the field name. Sort Options include:

Ascending

Decending

Select - Allows comparison of fields or comparison of a field against a constant value. Sequencing functionality.

Unselect - Unselect may also be done be criteria

Unique - Finds duplicates and selects the 1st record that is duplicated. can be used to find duplicate stations in a cell.

Record Menu Items -- To be developed

2.3.3. Graph Window

Table Window

Scroll Bars

This window is opened by choosing Display->Open Graph. Select time series relation (created using File->Relate, X-axis ( date), Y-axis (discharge, temperature, precipitation, nutrient concentration.