Unit Four: SymbolsUnit Four: SymbolsIn this unit…In this unit…

Types of Thematic Types of Thematic MapsMaps

Modifying Map Modifying Map Legends Legends

2Unit Four – SymbolsUnit Four – Symbols

ReviewReview

““Data FrameData Frame”” Organizes “Organizes “LaLayyersers”” Multiple Data Frames Multiple Data Frames

possiblepossible Yellow iconYellow icon

““LaLayyersers”” RepresentsRepresents

symbolized spatial datasymbolized spatial data Located within Data Located within Data

FramesFrames Use “Use “context menucontext menu” ”

for managing for managing propertiesproperties

Draw in TOC order Draw in TOC order (bottom to top)(bottom to top)

Data RepresentationData Representation

3Unit Four – SymbolsUnit Four – Symbols

ReviewReview

Change the Legend from the TOC Change the Legend from the TOC symbolsymbol

Get this when youGet this when you

Right ClickRight ClickGet this when youGet this when you

Right ClickRight Click

Get this when youGet this when you

Left ClickLeft Click

Get this when youGet this when you

Left ClickLeft Click

Click the symbol – not the name. This Click the symbol – not the name. This works ANYWHERE you see a legend works ANYWHERE you see a legend

symbolsymbol

Click the symbol – not the name. This Click the symbol – not the name. This works ANYWHERE you see a legend works ANYWHERE you see a legend

symbolsymbol

4Unit Four – SymbolsUnit Four – Symbols

Modifying the LegendModifying the Legend

ChartChart

Dot DensityDot Density

Single Single SymbolSymbol

Unique ValueUnique Value

Graduated SymbolGraduated Symbol Graduated Graduated ColorColor

Types of Thematic Maps:Types of Thematic Maps: There are several There are several types of thematic maps as is illustrated in the AV 3.x types of thematic maps as is illustrated in the AV 3.x help files:help files:

5Unit Four – SymbolsUnit Four – Symbols

Modifying the LegendModifying the LegendTypes of Types of ThematiThematic Maps:c Maps:

•Unique ValueUnique Value(?)(?) (one layer)(one layer)

•Single SymbolSingle Symbol(three layers)(three layers)

6Unit Four – SymbolsUnit Four – Symbols

Modifying the LegendModifying the LegendLayer Layer

PropertiesProperties““Symbology” Symbology”

TabTabSpecify Specify legend legend

type here.type here.

Specify Specify legend legend

type here.type here.

7Unit Four – SymbolsUnit Four – Symbols

Modifying the LegendModifying the LegendLayer PropertiesLayer Properties““Symbology” TabSymbology” Tab

8Unit Four – SymbolsUnit Four – Symbols

Your turn…Your turn…

Chapter 4: Step 1 through 7Chapter 4: Step 1 through 7

9Unit Four – SymbolsUnit Four – Symbols

Other Symbology ChoicesOther Symbology ChoicesSome methods for reducing symbol classes:Some methods for reducing symbol classes:

1.1. Removing the Removing the value/symbol value/symbol from the from the legendlegend

2.2. Making the Making the symbol fully symbol fully transparenttransparent

3.3. Redefining the Redefining the layer layer altogether.altogether.

10Unit Four – SymbolsUnit Four – Symbols

Other Symbology ChoicesOther Symbology ChoicesLayer Definition Query:Layer Definition Query:

a way to show a way to show only the resultsonly the results of the of the queryquery

Definition Query:Definition Query: “NAME” = “NAME” = ‘Durham’‘Durham’

Only Durham Only Durham will be visible in the layerwill be visible in the layer

because the records for all other towns don’t meet because the records for all other towns don’t meet the querythe query

11Unit Four – SymbolsUnit Four – Symbols

Other Symbology ChoicesOther Symbology ChoicesThink about this…Think about this…

In In Polygon Polygon data:data:• The “data” is about the The “data” is about the areaarea bounded by the bounded by the

outline. outline.

• Values related to “area” and “perimeter” are of Values related to “area” and “perimeter” are of primary interest. primary interest.

• OutlineOutline of the area is not “data” - except that it of the area is not “data” - except that it is simply the is simply the edge of the areaedge of the area!!

In In Arc Arc data:data:• The “data” The “data” is is about the line. The areas that about the line. The areas that

might might be bounded by that line are simply not be bounded by that line are simply not relevant.relevant.

Data Attributes:Data Attributes:

[Area] & [Perimeter][Area] & [Perimeter]Properties:Properties:

Fill, Outline, ColorFill, Outline, Color

Data Attributes:Data Attributes:

[Length][Length]Properties:Properties:

Line Weight, ColorLine Weight, Color

12Unit Four – SymbolsUnit Four – Symbols

Your turn…Your turn…

Chapter 4: Step 8 through ENDChapter 4: Step 8 through END