Introduction to Arcview 3.2

Thelma A. Cinco Senior Weather Specialist ,PAGASA Philippines Resource Person LECTURE BY: Ernestine B. Gayban, namria

ArcView Basics • Tool for presenting information • Visualize, explore, query, and analyze data geographically • Create and edit data • Create maps

The ArcView Interface

Project window Menu Bar Tool bar View window Button Bar Status bar Table window

Arcview Projects • contains Arcview

documents

• manages how and where documents are displayed • is stored in a project file (.apr) Project window

ArcView Documents

View Tables Charts Layout Scripts

Views and

Themes

• Projects can contain many views • a view manages the display of geographic information • a view displays geographic information in a

theme

•

themes

represent features as points, lines, or polygons • views display themes from many data sources

Themes Table of Contents Map display

Common

theme

operations • making themes active (raised) • turning themes

on

and

off

• changing the display order (by dragging)

Theme feature types

Point marker Line style Polygon fill pattern

Creating a view •

Open a project (new or existing)

•

Create a new view document

•

The new view is listed in the project window

Spatial data sources • Arcview shapefiles • Arc/Info coverages • CAD drawings • data from Spatial Data Engine • image data • tabular data

Adding a feature theme •

Add Theme button

•

Select data sources

•

New themes added to view

Additional data sources for themes • Image data • Tabular data - data from SQL databases (e.g. Access, Oracle) - dBase files - INFO tables - text files

Adding an image theme to a view •

Add Theme button

•

Select data sources

•

Image theme added to view

Saving a project • Saves your work on any project • Updates the project (.apr) file with the current project name window position feature selection theme display

Thematic mapping with the Legend Editor • choose a legend type • choose a classification • add descriptive legend text • change symbology

Legend Editor

Legend types

Legend types

Legend types

Changing symbols with the Symbol window

Modifying legend elements • Sort values and labels • Flip symbols • Ramp colors • Undo changes

Working with null values • Values you do not want to use in classification • Values that indicate no data is available • Examples of null values: -99, 0, blank, none

Managing theme display with theme properties • Define a theme subset • Label theme features • Set scale thresholds for displaying themes • Create Hotlinks to theme features • Lock theme properties

Defining a theme subset •

Subset of theme features - RHU

•

All theme features

•

Build an expression to define a subset

Setting a scale threshold •

Set a range of scales for displaying a theme Scale denominator = 350,000 Scale denominator = 500,000

Labeling theme features •

Select a field for labeling features

•

Label one feature

•

Label all features

Using Auto-label •

Find best placement for text

•

Manage overlapping and duplicate labels

•

Place labels only in the current view

Hotlinking theme features •

Hotlink tool

•

Image

•

Text file

•

Document

•

Project

•

Script

• Creating hot links

Select a field and an action