104/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

ArcView 3.1/3.2

An Overview

As of January 2000, ArcView 3.2 was superceded by ArcGIS 8.

The term ArcView was applied to the lowest level tier of ArcGIS 8.

Progressively higher tiers, all with a common interface, were termed ArcEditor and ArcInfo

204/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

Arcview Components• projects

– all components associated with a particular undertaking

– comprised of views, tables, charts, layouts, scripts

• view– essentially a map which you look at

or view– contains one or more themes

• themes – layers of spatial data with similar

characteristics (eg streets, hydrolgy, capitals)

– in ARC/INFO called coverage if vector, grid if raster

• tables– rows (usually geographic locations, linked

by ID to theme features) – columns describe attributes (characteristics)

of locations

• chart– business graphics to display geographic

and tabular data

• layout– graphic output/screen display of views,

tables, charts

• script– automation feature written in Avenue

which allows full customization

304/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

ArcView: Example Screen

404/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

Arcview Components:

Projects• Project (workspace)

– all components (‘documents’) associated with a particular undertaking

– stored in file with extension .apr– components dynamically updated:

change one part, other parts updated accordingly.

– reopens in identical form to when closed

– five types of documents available: views, tables, charts, layouts, scripts

– each document has a set of tools for working with it

Layout

Chart Table

View

Project

geographic features (a map with one or more themes)

businessgraphics

output

database

scripts(provide automation, special effects, etc)

504/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

ArcView Components:

Views & Themes• a view is essentially a map which

you look at (view) on the screen (or print with layout)

• it contains one or more themes (ARCINFO coverages/grids) which are layers of spatial data with similar characteristics eg streets, hydrolgy, capitals

• only one view active at a time

• themes listed in ArcView Table of Contents which allows you to control themes to be viewed

• themes are added from View window using View pull down menu

hydrology

GIS Framework

roads

topography

Data is organized by layers, coverages or themes (synonomous concepts), each representing a common feature.

604/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

ArcView Components

Tables & Charts• contains attribute (descriptive) data

• can create in ArcView or access data from other sources (e.g via SQL)

• references to tables are stored, not data itself (therefore automatic update)

• event tables contain geographic references and can be mapped (non-event tables can simply be included in layouts)

• charts can be used to display tabular data.

• 6 types: area, bar, column, line, pie, scatter

Area Bar

Column Line

Pie Scatter

Since data is stored in dBase tables and Excel can read these, it’s often as easy to use Excel (or similar) for graphing, especially for “one-off” charts.

704/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

Data Types in basic Arcview (3.2) [others available via standard (free) or optional (extra $) extensions]

Vector (spatial)– shape file: ARCVIEW’s native format (object

database model)– coverage: ARC/INFO’s native format (relational

database model)– SDE (Spatial Data Base Engine)– x,y coordinates defining lines, points, polygons

Tabular (attribute)– dBase III and IV (.dbf)– INFO tables (ARC/INFO)– ASCII tab or comma delimited files– SQL (e.g to ORACLE, INGRES, SYBASE,

INFORMIX )– ODBC (Microsoft’s Open Data Base Connectivity:

for Windows apps.)

Output– shapefiles– Crystal Reports integrated reports– output layouts as JPEG– DXF export

Raster (image data as themes)– ARC/INFO GRID– ERDAS– BSQ (band sequential)– BIL (band interleaved by line)– BIP (band interleaved by pixel)– TIFF (tag indexed file format)– TIFF/LZW compressed (extra-cost add-on)– SUN raster– run length compressed (RLC)

for hot link only– GIF (graphics interchange format)– X-Bitmap (X-windows bit map)– XWD (X-Windows dump format)– MacPaint– Microsoft DIB (Device Independent Bitmap)

804/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

Standard Extensions Provided with AV3.1/3.2 File SupportFile Access

• CAD file reader extension including 3-D into Spatial Analyst:

– AutoCAD, .DWG– AutoCAD binary .DXF– Bentley MicroStation .DGN– Intergraph/Bentley .MGE

• Direct database access via SDE • ArcView R/3 Extension and Interface

– Download data and interact on transactional basis with SAP/R3– Interact with Material Management

and Plant Maintenance modules (3.2)

• S-57 Data Converter (3.2)– International Hydrographic Organization

• SDTS Spatial Data Transfer Standard (3.2)• Image Data

– ERDAS Imagine Files– MrSID compressed images– TIFF 6.0 incl. GeoTIFF 1.0 – JPEG/JFIF public domain compressed image

• military data formats – ARC Digitized Raster Graphics (ADRG)

– Compressed ADRG (CADRG)

– Controlled Image Base (CIB)

– National Image Transfer Format (NITF)

• Vector Product Format (VPF)– MGRS (Military Grid Reference System)

– Raster Product Format (RPF) (3.2)

– DIGEST (ASRP/USRP) British and French military formats (3.2)

Digitizer extension– much improved control

Extensions must be loadedvia File/Extensions before they can be used.

904/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

Standard Extensions Provided with AV3.1/3.2 Processing and Mapping

Display & Mapping– Map Legend and Table of

Contents creation– Add graticules and grids– add neatlines– Map labeling extension to

avoid label placement conflicts between multiple themes

Projection Handling– Projection utility (with

3.2—hooray!!!) for shapefiles

– Add as extension or run externally

Spatial Analysis– geoprocessing

extension adds many new theme analysis capabilities

Many additional capabilities are available via:•User contributed extensions downloadable from ESRI Web site•Extensions purchasable from 3rd party vendors•Scripts on ESRI Web site & in arcview\samples folder

1004/19/23 Ron Briggs, UT-Dallas POEC 6381 Introduction to GIS

Optional Extensions Available for AV 3.1/3.2

• 3D Analyst– 3D analysis of surface data– TINS, GRIDS, DEMs

• Spatial Analyst– 2D analysis of raster data– GRIDS, contouring

• Network Analyst– network routing, etc

• Image Analyst– Remote Sensing image analysis – based on ERDAS

• Business Analyst– suite of business tools– includes Network Analyst and Streetmap– includes demographic data

• ArcView StreetMap 2000– enhanced geocoding:

– newer version of Streetmap (Nov 1994 streets)

• Tracking Analyst– realtime GPS input

• Internet Map Server– placing maps on Internet

• ArcPress for ArcView– printing enhancement

Optional extensions (extra $s) provide more specialized analytical capabilities.

Using Extensions and Scripts in ArcView• Obtain copy of script or extension

– Write yourself with Avenue language– Supplied with ArcView in folder: arcview/samples/scripts or arcview/samples/ext

• Go to ArcView Help/Contents/Sample Scripts and Extensions for documentation

– Buy from ESRI and other companies– Supplied free by ESRI or users and available on ESRI web site at: http://gis.esri.com/arcscripts/scripts.cfm (also includes

extensions)• or go to www.esri.com and click Support/Downloads/ArcScripts• Be sure to print or download documentation/description

• To load and use an extension– Place .avx file in arcview/ext32 folder– Open ArcView, choose File/extensions, place tick next to name, click OK

• To load and use a scriptIn Project window, select Script and click new button to open script windowUse Script/load text file to load code from existing text file containing avenue code (.ave)

e.g. \av_gis30\arcview\samples\scripts\calcapl.ave will calculate areas, perimeters, lengths

Click the “check mark” icon to compile the code.Take steps within ArcView as appropriate for specific script

e.g. Open a View and be sure the theme you want processed is active.

Click on script window then click the “Runner" icon to run script.e.g. variables measuring area and perimeter will be added to theme table

Will be covered in later classes.