The GIS Element Properties dialog box allows the user to define various GIS elements and their properties, style the border associated with the element, and change the image’s transparency. Furthermore, it also allows the user to change the CRS (coordinate reference system) of the current project and automatically apply the transformation scale factor to any layer to accurately map it to the project CRS.
Following are the types of GIS Element Properties dialog boxes for the GIS elements: polygons, polylines, and points, respectively:
- GIS Polygon Properties
- GIS Polyline Properties
- GIS Point Properties
In this article, we will use the GIS Polygon Properties dialog box to demonstrate and describe the GIS Element Properties dialog box of the CivilGEO software.
Follow the steps below to use the GIS Polygon Properties dialog box:
- In the Map Data Layers panel, click on the […] button next to the desired GIS layer.
Note that the user must follow the same step to access the GIS Element Properties dialog box for the other GIS element types, such as point and polyline. - The GIS Polygon Properties dialog box will be displayed.
The GIS Polygon Properties dialog box contains three tabs as described below:
- General Options
- Spatial Reference
- Transformation
General Options
Various sections of the General Options tab are described below:
General Information
This section contains read-only information about the location of the element properties file and the file name.
Polygon Border Stylization
This section is associated with the border of the polygon. It allows the user to set its color, width, style, and transparency. Note that the Polygon Border Stylization checkbox is selected by default.
Default Polygon Fill Stylization
This section provides options for the user to fill the polygon with color and adjust the transparency so that you can see through the polygon to the background Base Map. A transparency value of 40 to 50% works well. Note that the Default Polygon Fill Stylization checkbox is selected by default.
Assign Elevation
This section is used to assign elevation to elements. The following radio button options are available:
- Drape onto terrain
On selecting this option, elements appear to drape onto the surface terrain representing the ground surface. This radio button option is selected by default. - Offset above terrain
On selecting this option, the user can apply the offset value to raise the terrain of the selected elements by a specified amount. The user can enter the offset value in the entry field next to this radio button option. - Assign fixed elevation
This option allows the user to assign a fixed elevation value for the selected polygon. The user can enter the elevation value in the entry field next to this radio button option. This radio button option is unchecked by default. - Assign height attribute
This option allows the user to assign a height attribute from the selected shapefile metadata. The user can choose the desired height attribute from the dropdown combo box. By default, the dropdown combo box is set to None. - Assign elevation attribute
This option allows the user to assign an elevation attribute from the selected shapefile metadata. The user can choose the desired elevation attribute from the dropdown combo box. By default, the dropdown combo box is set to None.
In addition, the following options are available in this section. Note that these options are available only when the user has selected an option other than the Drape onto terrain option.
- Extrude walls
This option is used to include sidewalls for the subbasins. - Use map layer imagery for roofs
This option is used to replace roofs with base map imagery. - Wall type
This dropdown combo box allows the user to select the desired wall type. The Wall type dropdown combo box lists the following types: Horizontal stripes, Random, Solid Color, Vertical Stripes, and Windows.
Other Options
This section is divided into the following three panels:
- Attribute Mapping
This panel allows the user to provide different colorization styles to a selected attribute. Refer to this article in our knowledge base to learn more about attribute mapping. - Annotation Mapping
This panel allows the user to change and display the labels of the attributes of GIS elements on the Map View. Refer to this article in our knowledge base to learn more about annotation mapping. - Map Scale Display
This panel allows the user to transform the scale factor of the data to be displayed on Map View. The user can select the maximum map scale ratio from the Maximum map scale dropdown combo box. Similarly, with the Minimum map scale dropdown combo box, the minimum map scale ratio can be selected. By default, the maximum and minimum map scales ratios are set to None.
Spatial Reference
The Spatial Reference tab allows the user to manually assign the project’s CRS to the non-CRS referenced data layer coordinates if the data layer lies within the project’s CRS. Refer to this article in our knowledge base to learn more about spatial reference.
Transformation
The Transformation tab allows the user to automatically apply the transformation scale factor to any particular layer and accurately map it to the project coordinate reference system (CRS). Refer to this article in our knowledge base to learn more about layer transformation.