Similar to the Graudated Colors Map, the Graduated Symbols Map maps a certain attribute Select Fields of the Vector Layer to different levels, and each level is represented by dot symbols with different sizes. The size of the symbol is proportional to the Property Field value. The larger the property value, the larger the point symbol on the thematic map, and vice versa. Graduated Symbols Map are mostly used on maps with quantitative characteristics, such as the classification of grain production, GDP, population and so on in different regions.
Click the "Graduated Symbols Map" "button in the" Thematic Map "tab to generate the Graduated Symbols Map of the system default style. Users can set various parameters and customize the Create a graduated symbols map. Through the window of the Graduated Symbols Map. The following figure shows the schematic diagram of the Graduated Symbols Map. It is a Graduated Symbols Map based on the historical earthquake magnitude in Shanxi Province, and the larger the point symbol is, the higher the magnitude is.
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Graduated Symbols Map can be made based on any point, line or surface Vector Layer. When making a Graduated Symbols Map, first set the Vector Layer Settings to be Create Thematic Map as the current layer, that is, select the Vector Layer in the Layer Manager.
There are two ways to make Graduated Symbols Map:
Create a new Graduated Symbols Map.