Map symbolization

Use symbols to highlight the Attributes of the map layer. For example, in an administrative layer representing a city, use the circle size/color to represent the population of each city.

The following describes the Style Settings in the different layers:

Set BaseMap Layer Style.

The BaseMap layer represents the administrative divisions of the Chengdu area. In this tutorial, it is used as a base map, and a single color can be used for it. The specific operation steps are as follows:

Double-click the'BaseMap @ Subway 'layer in the Layer Manager to jump to the Layer Style panel on the right side of the window.

Hint:

When a DatasetAdd to Map a window, it is called a layer, and the default naming rule of the layer is "Dataset Name @ Alias".
In the Layer Style panel:
- Set Foreground Color to light gray;
- In the Linetype group, set the line color to gray (R: 127, G: 127, B: 127).
Do not modify the
Other Parameters, and the obtained BaseMap Layer Style is as shown in the following figure.

Set Subway Layer Style

The Subway layer represents the subway lines in Chengdu in 2022 (excluding trams). In order to distinguish different subway lines, each line is represented by a different color.

Select a "subway @ Subway" layer in the Layer Manager, and select Create Thematic Map.. in its Context Menu to pop up the Create Thematic Map dialog.
Select Unique-values Map-> Default from the list bar on the left side of the Create Thematic Map dialog box, click OK, and then the Thematic Map panel pops up on the right side of the program interface.
The Thematic Map panel is divided into two panels: Properties and Advanced. Only the Parameter Settings in the Properties panel are introduced here.
- Expression: Set the "NAME" field in Subway Dataset as an expression, which stores the name of each subway route. When an expression is selected, all single values are listed in the corresponding single value list below.
- Color Scheme: Display and set the color corresponding to each single value. A default Color Scheme is specified, and when the expression is set, all single-valued colors are rendered according to the specified Color Scheme. In this example, each subway line has an agreed color, so the Color Scheme can be left unset.
- Unique-Values Style Modification: When the default Unique-Values Style does not meet the drawing requirements, the style of each individual value can be modified. In this case, you need to modify the style of all subway lines. Taking the modification of the style of "Metro Line 6" as an example, the specific operation steps are as follows:
  (1) Select the "Metro Line 6" line in the single-value list, and double-click the symbol in the Style column to pop up the Line Symbol Selector dialog box.
  
  (2) Select Workspace Resources in the leftmost tab of Line Symbol Selector, and select Chengdu Metro group in the corresponding displayed tree directory.
  
  (3) Select "Line 6" in the line style corresponding to the Chengdu Metro group, and click OK to apply the selected Line Style on the map.
  
  (4) For Style Settings of other subway lines, repeat the above three steps.

The effect of the subway layer after making the Unique-values Map is as follows:

Set Substation Layer Style.

The Substation layer represents the location of Chengdu Metro stations, and each station is represented by the same symbol.

Click the'Substation @ Subway 'layer in the Layer Manager to jump to the Layer Style ribbon on the right side of the interface. Works pace Resources is loaded here by default.
Click the Setting button to open the Marker Symbol Selector dialog box, select the Basic Symbol plug-in symbol library on the left side, and enter "Metro" in the search bar to search for all Metro symbols under the current root group.
Select the subway symbol numbered 288. The width and height of the symbol can be set on the right side, that is, the size when the symbol is used. Here, it is set to 5.0mm. The setting of the dot symbol is shown in the following figure.
Click OK and the selected subway station symbol is applied on the map. The result is shown in the following figure.

Set TransferStation Layer Style.

The TransferStation layer represents the transfer stations on each subway line, and each transfer station is represented by the same symbol.