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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 \Symbology\Symbology_Doc1.mxd - PowerPoint PPT Presentation
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Welcome to Welcome to DEP’s GIS Workshop DEP’s GIS Workshop
SeriesSeries
Workshop 4Symbology in ArcMap
Displaying SymbolsClick on plus and minus signs to the left of the layer name to expand or collapse layer names and/or symbology.
Symbology in ArcMap 2
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 3
Drawing Order Affects What You See!
Solid Fill Polygon Layer On Top of Base Map Layer = Base Map Layers Not Visible
Symbology in ArcMap 4
Solid Fill Polygon Layer Beneath Base Map Layer = Base Map Layers Visible
Drawing Order Affects What You See!
Symbology in ArcMap 5
Fill Color and TransparencyTo “see through” a polygon layer, there are two options:
1.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.)
OR2. Set a Transparency percentage in the Properties/Display dialog box.
Symbology in ArcMap 6
Setting Fill Colorto “No Color” Select “No Color” from the Fill Color box.
Symbology in ArcMap 7
Result:
Symbology in ArcMap 8
Setting TransparencyOpen Properties dialog box by double clicking on the layer name. Select the Display tab. Type in a transparency percentage.
Symbology in ArcMap 9
Result:
Symbology in ArcMap 10
Symbology Types• Features Single Symbol
• Categories Unique ValuesUnique
Values/Many Fields
• Quantities Graduated ColorsGraduated Symbols
• Multiple Attributes Quantity by Category
Symbology in ArcMap 11
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 12
Go to the Symbol Selector dialog box by clicking on the symbol in the legend.
Symbology in ArcMap 13
The Symbol Dialog Box
Symbology in ArcMap 14
Point Example – Boat Launches
Start with a custom color
Choose a shape, size,and angle
View the result
Creating and Modifying Symbols
Finding New Symbols
There are many other sets of symbols available
Symbology in ArcMap 15
Creating and Modifying Symbols
Symbology in ArcMap 16
Polygon Example – DEP Property
Start with a custom color
Add a marker fill
View the result
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 17
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 18
Quantities (Graduated Colors)
Features are symbolized according to quantitative data.
In this example, different colors depict town population.
Symbology in ArcMap 19
Quantities (Graduated Symbols)
Features are symbolized according to quantitative data.
In this example, different size points depict town population.
Symbology in ArcMap 20
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 21
Environmental Justice Areas
Symbology in ArcMap 22
DEP’s Layer Files
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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
Saving a Layer FileIf 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 24