Display & Visualization¶
Visualization of working sections in 2D¶
If you want to go through the model step by step (vertical cross section for vertical cross section), you can use the 2D View.
In the Tool Bar under Add View → 2D View.
The 2D View tab opens and the first vertical cross section of the model is displayed:
There are several ways to step through the vertical sections of the model.
(1) Use the ˄ (up) and ˅ (down) in the right upper part of the main window to step through the model.
Now let's learn about two other options:
(2) Open the sections in the "OBJECT-TREE" window of IGMAS+ and select the section to be visualized (for example section 7). Click with the right mouse button on the section symbol and select "View Section/2D" in the window. The selected section will appear. Because each section must be clicked individually, it will take longer to view large models than with the method described above.
The third possibility to visualize sections is realized via the "Map display".
Add view > 2D Maps View (click)
Then the three maps appear that are active in the Object tree under "Fields".
Then the three maps appear (measured - calculated residial field), which are active in the object tree under "Fields". From left to right you can see the map of the measured field, the modeled field, and the differences between the measured and the modeled field.
A map enlargement can be seen in the next figure. Click with the right mouse button on the map layer and the window that opens offers the possibility to draw the section (click "Show sections").
NOTE: In the same way, other information can be selected in the same window.
For example, "Show Stations", "Show Contours", etc.
Click on one of the lines/vertical sections. It will be highlighted in red and the section name will be displayed.
Clicking with the right mouse button on the selected line opens the 2D view of this section.
The default setting is always the perspective display of the reference field (measured field). The default setting is always the perspective display of the reference field (measured field). This can be adjusted by clicking the following button in the TOOL-BAR line:
Add view > 3D Model > click
If the display of the comparison field is not desired, the user has the option to change this in the 3D display. In the following the difference field is to be represented. A right mouse button click on "Residual Field" opens the window and one selects "Show in 3D":
If you want to visualize the underlying information (e.g. positions of sections), you can change the transparency of the field display. Go to "Fields" in the OBJECT TREE and activate "Property Editor" in the BODY MANAGER below.
Here you can change the transparency (using the slider). In addition, a "shading" of the surface can be created and an exaggeration of the field.
The value for exaggeration is always smaller than 1: ValExagg \< 1
Perspective of 3D Model¶
The 3D model can be displayed in two perspectives. The default is the perspective view. Modification: click with the right mouse button in the model and select "View" in the window and select the perspective with the left mouse button:
A second, alternate procedure is:
Go to the line below the “TOOL BAR” and click the shown options for model perspective:
If all three types of display are selected, you will see below the TOOL BAR:
The three windows can be removed again by clicking on the X.
Zoom in, zoom out, move and place IGMAS+ elements¶
Click in the workspace window on the object to be enlarged/down sized.
- ZOOM in with a movement of the mouse wheel t o w a r d s the user,
- ZOOM out with a movement of the mouse wheel a w a y from the user.
This is generally true for all three "views:
But click for 2D View in the model.
Click with the right mouse button on the object and moved it pressed:
Moving objects of: 
Click with the right mouse button on the model and moved it pressed up and down, to the left and right. The window with the field curves will be placed correctly above the model.
Tilting a 3D View in its actual position: 
Click with the left mouse button in the workspace window and moved it pressed:
Center objects
Center model and 2D map views:
Click with the right mouse button in the model, select "Center at" in the window and select the perspective with the left mouse button:
A second, alternate procedure is:
Go to the line below the “Tool bar” and click the shown options for centering the model:
Center 2D View:
Go to the line below the “Tool bar” and click the shown options for centering the 2D cross section:
The cross section (lower panel)) together with the field values above it (upper panel) is centered in the area where stations are located.
2D View Section front/back side
In vertical cross sections that show the geometry of different bodies on their front and back sides (also called: double occupancy), the two icons of the following figure determine whether the front side (left icon) or the back side (right icon) should be shown.
Color management¶
Colors are used in IGMAS+ in two very different areas:
- (1) For the differentiation of bodies (geological structures) or
- (2) in the map representation of the used fields.
For the differentiation of bodies (1) the program distinguishes between two color schemes:
- either the (geological) bodies are filled according to the colors known in geology (e.g. blue for Jurassic, green for Cretaceous and yellow for Tertiary rocks) or
-
the colors are determined according to the density of the body. Blue colors correspond to high densities of rocks, brownish colors to low densities.
This color spectrum is automatically set by the program and is based on the color scale used to create the residual gravity maps. In the current IGMAS+ version, the user does not have the possibility to change the scaling or the colors of the color scale. You can see the color palette (Vik) here; the way to get there is described in this chapter below.
Note: At the beginning of a modeling project IGMAS+ automatically sets the colors for geological bodies. They must then be changed by the user according to the two color schemes.
Change colors for geological bodies/polyhedrons¶
Be sure to have selected the “Normal Color Mode” after clicking View in the TITLE BAR > “Body Color Mode” in the popped-up window > and set “Normal Color Mode”.
If the colors for the susceptibility of the bodies are to be set, then of course "Susceptibility Color Mode" must be selected in the window shown above. The process is analogous to the selection of the "Normal Color Mode".
Select “Add View” in the TITLE BAR and klick on “2D View”. Below the TOOL BAR the icon for “2D View” is set:
Then go to the “Object tree” (top left), click on 
to open the "Interfaces" tree
and select the body whose color is to be changed (here: 032_con_Sed_Po; blue bar):
... go to the „Property Editor“ > click in the opened menu in „Body“ and „Color“ > click on the small color window and click on the three grey points 
:
The color is also identified in the RGB color scheme (R:102 - G:204 – B:255).
Clicking the three grey points (figure above) this window popped up:
Select by clicking a new color
Alternatively, the colors can be changed in this window using the HSV - HSL - RGB - CMYK color scales. The effect is the same everywhere.
Change colors for IGMAS+ maps¶
The color palettes used in IGMAS+ for map display follow new findings regarding the physiology of perception of healthy and visually impaired people (see for example:
https://theconversation.com/how-rainbow-colour-maps-can-distort-data-and-be-misleading-167159.
IGMAS+ uses two options for selecting different color palettes for displaying the comparison field (measured gravity/magnetic field) and the modeled field (calculated) on one side and for displaying the residual field on the other.
Selection of the color palette for measured and modeled field¶
Select “Add View” in the TITLE BAR and klick on “2D Maps View”. Below the TOOL BAR the icon for “2D View” is set:
Three maps are shown:
Measured field (left) ------------------------------------------ Calculated field (middel) ---------------------------- Residual field (right)
Select below the TOOL BAR on the right upper corner the icon 
and select the tab “meas Gz/calc Gz”.
Get a window which visualize the Batlow palette.
By click on of the Colormaps, other palettes may be selected:
Note: The selection of the Batlow palette represents a good compromise, in terms of the previously often traditional "rainbow colors" palette and the currently recommended.
To select the color palette for the residual field/”Residual Anomaly” select the tab “Residual Anomaly”:
The Vik palette is grouped around a central value (here: the Null value of the residual anomaly).
By click on of the Colormaps, other palettes can be selected.
Switch on and off fields¶
Refer to OBJECT TREE an select Fields. If you don't want any fields to be displayed at all, uncheck the box with the blue checkmark 
in front of Fields. If fields are to be displayed, then expand the tree under Fields, by clicking on . By unchecking the blue tick boxes in front of the corresponding fields (calc Gz or meas Gz or Residual Anomaly), the corresponding field can then be switched off/off respectively.
Point information of model parts¶
In addition to the Property Editor and Body Manager, there is also the Information Tab. Click on Information > move the mouse over the screen. The window now shows the information about the respective item.
