This is the area where any
kind of data (image, road map, altimetric map etc.) is presented. It is the SPRING
main menu itself, as well as the other visualization windows, and even the
contrast dialog box.
The visualization windows
or drawing areas are controlled in the Control Panel or
in the bottom of the window, as well as its presence in the working area and
the data that is being presented. Next it will be described the facilities of
this windows.
Footnote - just below the drawing area, the
footnote presents a message to the right, indicating which is the active
Information Layer, that is, the IL that will receive an operation, even if this
IL is not visualized in the window, and to the left it presents the cursor
geographic coordinates, the windows and the buttons: float page, add windows,
remove windows and replace pages on the tab bar.
See:
How to define presentation modes
How to see Geographic Data Positioning
How to Open (or View) and close a Drawing Area
How to Use a Zoom
How to Zoom In / Zoom Out / Zoom IL
How to Merge Windows?
About the Digitizer Cursor, Point and Graph Canvas!
The Draw, Previous Image and Reset resources in the
Drawing Window!
How to get information of the IL displayed?
How to fly after a zoom (pan resource) ?
See also:
How to display data in the window?
How to see the caption in a thematic map?
Control Panel Resources
Auto/Full/Scale Mode
The
IL presentation in the drawing area can be controlled by other parameters that
are defined for each window. In the footnote of each window (
version) or the tools bar (
version) there is an option
button that allows the selection among: Auto, Full and Scale. See the
effect of each of these options:
NOTE: When
clicking on Execute - Reset or the button
in the active window, the presentation mode returns to the Auto Mode.
To
change the presentation mode :
When a project is active
and the cursor is moved over an opened drawing area, the geographical position
of the cursor can be displayed, in planar or geographical coordinates. In order
to get this feature, one should change the coordinate field that is in the
“drop-down” listing box, to the right of the text scale box. The options are:
Disabled
This option disables the coordinates at the footnote area.
Planes
The coordinates are presented at the window footnote area, in meters.
Geographic
The coordinates are presented at the window footnote area, in degrees, minutes
and seconds.
To
change the coordinate system:
Not including the SPRING
main menu, which is also a drawing area, it is possible to open or close other
drawing areas (Auxiliary Displays, 2, 3, 4, ... n):
To
open a drawing area:
Ways to close a drawing area:
To close a drawing area,
one should select another drawing area, and the one that was active
becomes inactive. It can also be done by clicking on the “drop-down”
listing box in the Control Panel (if it
is floating) or by clicking on the buttons (displays) at the lower
left corner of the window.
WARNING : The Close button at Window 1 (Main
Menu), closes the program.
* Opening a drawing area does not mean it is active.
The Zoom Cursor is
used to define regions that can be amplified in the drawing area. The zoom is
enabled when this button is active, and the mouse cursor has the shape of
an arrow pointing to the right bottom corner, for and for
, inside the drawing area. Two
points are required to establish the zoom area, the upper left corner and
the lower right corner.
The procedure to make a
zoom needs 4 main steps:
Making a zoom in the
drawing area:
NOTE: In order to disable the zoom
cursor and go back to the normal mode, just click on the Zoom Cursor
in the tools bar or [View] [Zoom Cursor], or use the
middle right button (RB) inside the drawing area.
Once a zoom area is defined
(dotted rectangle) this can be resized before the [Execute][Draw]. Click
on any of the rectangle sidelines or the rectangle external diagonals. These
allow resizing (see the eight possible positions in the figure below). A second
click is required to anchor the new position.
The marked zoom area can
still be totally moved to another position, just click in the internal part of
the defined rectangle, drag it to the desired position and click again to
anchor it in a new position.
The zoom resource is very
important when one wants to see an Information Layer in more details. For data
in the raster format, the zoom does not make sense since it is possible to see
the resolution elements (pixels). A vector data, however, will not loose its
resolution, independently of the scale used.
After presenting some data
in any of the SPRING window, it is possible to ZOOM IN or to ZOOM OUT the data.
It is possible to amplify (Zoom +) or reduce (Zoom -) once
starting from the drawing center area. Another option is to draw the IL
evolving rectangle exactly, which is previously defined.
Just click on one of the options:
The Zoom
In button or [Execute] [Zoom In] in the main menu
amplify the area twice starting from the drawing area center after selecting
the IL’s in the "Control Panel".
The
Zoom Out button or [Execute] [Zoom Out] in the main
menu reduces the area twice starting from the drawing area center after
selecting the IL’s in the "Control Panel".
The
Zoom IL button or [Execute] [Zoom IL] in the main menu
amplify the data according to the active IL in the "Control Panel",
based on the evolving rectangle in the IL. Other IL's can be selected, but the
action will be on the active IL..
Merging one SPRING window means to show its
contents, that is, the IL's that are selected in the "Control
Panel", in the main window, through a mobile window over the drawing
area.
This window merging
resource allows, easily, comparing the data from other IL's with the active and
visible IL in the SPRING main window. The figure below shows the central part
in main window, part of another merged window. See the following procedure.
Attaching the data from a display with the
main window:
NOTE: To add or remove displays, click
on the icons + (add page) and - (remove page), located on the lower
left corner of the footnote area.
NOTE: While the window is merged to the
mouse movement, the user can use the mouse RB (right button) to hide and
present quickly the merged windows contents. Keeping the RB pressed
without moving the mouse, the merged area temporarily disappears.
The figure below shows an
example of merged window, where there is an image in the Main Window and
a thematic image merged in the Display 2 .
Cross Cursor
The Cross Cursor is
used for SPRING functions where it is required to get a specific position in the
window, for instance, reading the gray levels of an image. To enable it click
on View - Cross Cursor. The cursor keeps a cross (+) shape in the display,
indicating that it is active. The cross cursor will be used in applications
where the coordinate has to be indicated by window pointing. One click with the
mouse right button disables the Cross
Cursor.
Digitizer Cursor
The Digitizer Cursor
button is used when we want to make a vector data digitizing through the
digitizer, and it only will be enable when a digitizer is connected and
configured, through the environment variables SPRINGTABLEPORT and SPRINGTABLE
(more details about this see the environment variables).
IMPORTANT : Do not forget to make the digitizer calibration before using
it.
NOTE : When activating the Digitizer Cursor, the mouse will become
disabled, allowing only the digitizer cursor movements. In order to return the
control to the mouse, just click the button
Graphic
The Graphic button
in the tools bar or View - Graphic is used to show some
application's results in the graphic form, such as Profile Calculus and Lineaments
analysis (not available in this version of SPRING).
The
Draw button or [Execute] [Draw] in the main menu updates
the data in the window according to the selection performed in the
"Control Panel" and the presentation characteristics, such as scale,
defined in the window. It has to be activated at each new selection, after
changing the visualization parameters, data edition, and after defining the
zoom area with the cursor.
The
Reset button
or [Execute] [Reset] in the main menu resizes the data presentation as a
function of the window size and of the rectangle around the active project. It
will undo a zoom performed using the Zoom Cursor and restore the presentation
mode to Auto, if the system was set to Full or Scale.
The
Previous button
or [Execute] [Previous] in the main menu restores the last presentation action
of a data in the current window. It will undo the last zoom made through the
Area Cursor, Zoom In, Zoom Out, Zoom IL or Flying Cursor.
Once there is one or more
IL’s drawn in some of the displays, it is possible to amplify what you see
through another window. On the tools bar, use the Amplify Button to increase 2, 4 or 8 times the data in the drawing
area. Move the cursor over one of the displays and the cursor position will be
amplified according to the selected
number (the figure below show the cursor position amplified 4 times).
NOTE: This
amplifying resource is very useful when one wishes to locate with greater
precision the control points in an image registration process.
Window Cursor
The Window Cursor is used when
one wants
to visualize, simultaneously, the images positioning in
different displays. When clicking on the Window Cursor button in the active
window, a cross (+) will appear in the other shown windows, indicating the
position that corresponds to mouse position in the active window. The figure
below shows an example in which the main window is the active one and the blue
square represents the mouse position. Notice that in the Displays 2, 3 and
To get information from the presented IL's in the display
The usage of the button or [View]
[Info Cursor] in the main menu, allows to show all information about the
presented IL's in the active window. When activating this button, the cursor
changes to a cross (+) shape and when clicking in the active window, all
information in the indicated position are presented in the "Data Report " window. To restore the cursor's
shape (arrow), click on the info button again.
The flying feature using
the button
or [View] [Roaming Cursor] in the main menu, allows to move the data in the
window while keeping the visualization scale, and has only effect when the zoom
is applied over the data in the active window. The cursor turns to the cross
(+) shape when the flying feature is active. Click on a position in the window
and drag the mouse until the desired position, releasing it after that, so the
image will be presented in the new position. To restore the cursor to the arrow
shape, click on the mouse right button inside the drawing area or the flying
button itself.
Flying
in the window after the zoom: