Transcript ArcView Basics
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