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Welcome to DEP’s GIS Workshop Series

Welcome to DEP’s GIS Workshop Series. Workshop 4 Symbology in ArcMap. Displaying Symbols Click on plus and minus signs to the left of the layer name to expand or collapse layer names and/or symbology. Class Exercise Open C:ArcGIS Training Materials SymbologySymbology_Doc1.mxd

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Welcome to DEP’s GIS Workshop Series

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  1. Welcome to DEP’s GIS Workshop Series Workshop 4 Symbology in ArcMap

  2. Displaying Symbols Click on plus and minus signs to the left of the layer name to expand or collapse layer names and/or symbology. Symbology in ArcMap

  3. Class Exercise • Open C:\ArcGIS Training Materials \Symbology\Symbology_Doc1.mxd • Zoom in to 1:100,000 scale • Drag the Quaternary Geology layer beneath the Base Map layer. • Drag the Quaternary Geology layer above the Base Map layer. • When are the Base Map layers NOT visible? Symbology in ArcMap

  4. Drawing Order Affects What You See! Solid Fill Polygon Layer On Top of Base Map Layer = Base Map Layers Not Visible Symbology in ArcMap

  5. Drawing Order Affects What You See! Solid Fill Polygon Layer Beneath Base Map Layer = Base Map Layers Visible Symbology in ArcMap

  6. Fill Color and Transparency To “see through” a polygon layer, there are two options: Set the Fill Color to No Color in the Symbol Selector dialog box. (Hint: You may need to reset your Outline Color to distinguish this layer from other layers.) OR 2. Set a Transparency percentage in the Properties/Display dialog box. Symbology in ArcMap

  7. Setting Fill Colorto “No Color” Select “No Color” from the Fill Color box. Symbology in ArcMap

  8. Result: Symbology in ArcMap

  9. Setting Transparency Open Properties dialog box by double clicking on the layer name. Select the Display tab. Type in a transparency percentage. Symbology in ArcMap

  10. Result: Symbology in ArcMap

  11. Symbology Types • Features Single Symbol • Categories Unique Values • Unique Values/Many Fields • Quantities Graduated Colors Graduated Symbols • Multiple Attributes Quantity by Category Symbology in ArcMap

  12. Features (Single Symbol) Every feature is given the same symbol. In this example, dams in CT are represented by a red dot. Symbology in ArcMap

  13. The Symbol Dialog Box Go to the Symbol Selector dialog box by clicking on the symbol in the legend. Symbology in ArcMap

  14. Creating and Modifying Symbols Point Example – Boat Launches Start with a custom color Choose a shape, size,and angle View the result Symbology in ArcMap

  15. Finding New Symbols There are many other sets of symbols available Symbology in ArcMap

  16. Creating and Modifying Symbols Polygon Example – DEP Property Start with a custom color Add a marker fill View the result Symbology in ArcMap

  17. Categories (Unique Values) Features are grouped according to a value in a field. In this example, DEP Property is grouped by Area Type. Symbology in ArcMap

  18. Categories (Unique Values, Many Fields) Features are grouped according to values from more than one field. In this example, aquifer protection areas are symbolized by two fields: Av_legend and Adopted. Symbology in ArcMap

  19. Quantities (Graduated Colors) Features are symbolized according to quantitative data. In this example, different colors depict town population. Symbology in ArcMap

  20. Quantities (Graduated Symbols) Features are symbolized according to quantitative data. In this example, different size points depict town population. Symbology in ArcMap

  21. Multiple Attributes (Quantity by Category) Features are symbolized according to categorical and quantitative data. In this example, Pop./sq. mile and Description are shown. Symbology in ArcMap

  22. Environmental Justice Areas Symbology in ArcMap

  23. DEP’s Layer Files Characterized by “.lyr”. Does not contain actual spatial or attribute data, only “points to” data Contains “instructions” for displaying symbology Can have multiple datasets in one layer Symbology in ArcMap

  24. Saving a Layer File If you custom symbolize a layer, you might want to save it for use in this .mxd and other .mxd’s. Right click on the layer name in ArcMap, choose “Save as Layer File…” and specify a location in which to save your file. Symbology in ArcMap

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