Lecture0002

Lecture0002 - Lecture 2 Displaying Data 1 Learning ArcGIS 9 2 Reference map Designed to convey location of a variety of different features e.g

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1 Lecture 2. Displaying Data
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2 Learning ArcGIS 9
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3 Reference map Designed to convey location of a variety of different features e.g. water bodies, coastlines and roads. Useful for multiple purposes—e.g. atlas maps and topographic maps. One symbol for all features within a feature class e.g. one for water bodies, another for coastlines and a third for roads.
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4 Florida Reference map
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5 Symbol A graphic representation of a geographic feature or class of features that helps identify it and distinguish it from other features on a map. For example: Marker symbols, points; Line symbols represent arc features; Shade symbols, polygons; and Text symbols, annotation. Many characteristics define symbols, including color, size, angle, and pattern.
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6 Symbol Click on the symbol below MajorRoads
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7 Symbol Or via Properties of layer
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8 Text label • In ArcMap, label text comes from a field in a layer's attribute table. • You can specify label properties such as the font, size, color, and position in relation to the feature being labeled (such as top left, bottom center, top right). • Annotation is text added manually to a map. Annotation always stays at the position where you place it, but you can reposition it as desired. The text is not available in an attribute or isn't associated with a feature.
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9 Feature label
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10 Feature label
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11 Text annotation
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12 Background color
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13 Thematic map A map designed to convey trend or pattern information about a single attribute such as population density or geology or about the relationship among multiple attributes. An ArcGIS map on which features have been symbolized based on an attribute is called a thematic map. Symbol varies according to attribute data. A choropleth map is a thematic map in which areas are colored or shaded to represent the density of a particular phenomenon or to symbolize classes within it.
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14 Categorical data Object has name or description, e.g. name of a county, a land use code, or a type of highway. Category attributes are names, types, or ranks which can be text or numbers. Each unique feature attribute value represents a different category. When a layer is symbolized based on a category attribute, features in different categories are represented with a different symbol.
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Quantity data • Object has number values such as population or rainfall. • Quantity attributes are counts, amounts, rates, or measures and are always numeric. • The numbers represent feature quantities and are typically represented on a map by creating groups of features with similar values (classes) and a different symbol is assigned to each class. Graduated size and graduated color are the two
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This note was uploaded on 12/15/2010 for the course SAS SAS 18 taught by Professor Weswallender during the Spring '10 term at UC Davis.

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Lecture0002 - Lecture 2 Displaying Data 1 Learning ArcGIS 9 2 Reference map Designed to convey location of a variety of different features e.g

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