![]() A combination of different geometry types is also That way each yellowĬoloured lane will have a width of (7-1)/2 = 3 units.Ĭombining symbols can be a solution for many kinds of cartographical Will be a red line with a width of 1 unit. The second level STYLE willīe a yellow line with a width of 7 units, and the topmost STYLE Units, the lowest STYLE (in drawing order) will be a broadīlack line with a width of 9 units. To create the highway symbol mentioned above with a total width of 9 STYLEs to create complex symbols by overlay. The preferred solution is to use multiple Rendering process of the same geometry will take up additional However, have performance effects for the application, as every Vector data with different symbols, sizes and colours on top of each This calls for a combination ofĬomplex cartographical effects can be achieved by rendering the same Say you want to display a highway with a black border line, two yellow Structure of Cartographical Symbols` ¶ Multiple Rendering and Overlay ¶ Symbols, which is also used in MapServer: The following figure shows the theoretical structure of cartographical Point and area symbols as well as textįonts (ttf) can additionally be displayed with a frame which we call Theįollowing graphical variables can be used within MapServer: FORM, SIZE, In which symbols can be varied referring to graphical variables. Bertin (1974) created a clear and logical symbol scheme Introduction ¶Ī map is an abstract representation that makes use of point, line andĪrea symbols. The document has been heavily revised for MapServer 6. ( Download study report in German) His degreeĭissertation will also concern this subject. Hoffman mainly dealt with the development Parts have been taken from a studyĬarried through by Karsten Hoffmann, student of Geography andĬartography at the FU Berlin. Institute of Landscape and Nature Conservation. Results of a project carried out at the University of Hannover, The first version of the document was based on the This Document refers to the syntax of map and symbol files for Polygon fills with symbols of TYPE vectorĮxcerpts from the map file for the polygon fill vector examples above ![]() Polygon fills with symbols of TYPE pixmap LINEJOINMAXSIZE (only relevant for LINEJOIN miter)Īsymmetrical line styling with point symbols Symbol definitions for the figure that demonstrates point symbols Using Cartographical Symbols in MapServer Cartographical Symbol Construction with MapServer ¶ Author :
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