Presentation Objective Understand and Use ArcGIS … · Presentation Objective Understand and Use...

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1/62 Copyright 2006-2009 - John Schaeffer Working with ModelBuilder Presentation Objective Understand and Use ArcGIS ModelBuilder Review Geoprocessing in relation to ModelBuilder Defining ModelBuilder The ModelBuilder Interface Creating Models Creating Tools from Models Adding Scripts to Models Exporting & Sharing Models Creating Documentation for Models This PowerPoint available as a PDF at www.junipergis.com\Links

Transcript of Presentation Objective Understand and Use ArcGIS … · Presentation Objective Understand and Use...

Page 1: Presentation Objective Understand and Use ArcGIS … · Presentation Objective Understand and Use ArcGIS ModelBuilder Review Geoprocessing in relation to ModelBuilder Defining …

1/62 Copyright 2006-2009 - John Schaeffer

Working with ModelBuilderPresentation Objective

Understand and Use ArcGIS ModelBuilderReview Geoprocessing in relation to ModelBuilder

Defining ModelBuilder

The ModelBuilder Interface

Creating Models

Creating Tools from Models

Adding Scripts to Models

Exporting & Sharing Models

Creating Documentation for Models

This PowerPoint available as a PDF at www.junipergis.com\Links

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9

Geoprocessing is any operation that manipulates data.

Geoprocessing can be anything from basic data management to advanced analysis.

Geoprocessing is implemented as a collection of methods.

ArcToolbox

Command Line

Scripting

ModelBuilder

ArcObjects\VBA

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9

ArcToolbox

A collection of tools, often the starting point for most geoprocessing.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9

Command Line

Lists inputs, options, and will finish key words.

Useful for experienced users, especially those with ArcInfo Workstation background.

Useful for new users - quickly repeat similar commands without opening the Tool dialog.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9

Scripting

Can use Python or other scripting languages to perform Geoprocessing operations.

Useful for

-batch processing

-repeatable operations

-If/Then functions

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9

ArcObjects\VBA

Geoprocessing tools can be usedin VBA or you can use VBA to create new tools for use in ArcToolbox.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9

ModelBuilder

Provides a graphic interface for Geoprocessing operations

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9

These methods provide different ways to accomplish the same task.

All methods require similar parameters.Input Features – the data to be manipulated by the tool.

Output Feature class – the results of the tool operation – Derived Data

Other options depending on the tool.

Environments –where files are stored, which coordinate system to use for output, etc.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9

These methods often complement each other.

Running a Tool with the Command line open, fills in the command line.

Models can be exported to Scripts

Scripts can be used in Models

Models and Scripts can be run as tools from ArcToolbox,or from Command Line.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > ArcToolbox

ArcToolbox Organization

ArcToolbox contains Toolboxes, which can contain Toolsets, which contain tools, models & scripts.

ArcToolbox has several system Toolboxes, with the available tools based on the license.

Users can create custom toolboxes, toolsets, tools, models, and scripts.

Tools can be copied/pasted between toolboxes.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > ArcToolbox

ArcToolbox – Tool Layers

Tools can be added to the Table of Contents

Can include Models.

Acts like a layer, runs like a tool.

Saves last parameters; speeds operations.

Tool Layers can be rerun with different parameters.

Results layer will be named “Output Feature Class”, but actual data will have the name specifiedin the tool.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > ArcToolbox

Managing Toolboxes

Right-click inside ArcToolbox to:

Create New Toolbox

Add Existing Toolbox

Set Environments

Hide/Show Locked Tools

Save/Load Settings

Save Settings to Defaultis good practice so your new tools always display.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > ArcToolbox

Storing Toolboxes

System Toolboxes are stored in…ArcGIS\ArcToolbox\Toolboxes as .tbx files.

Other toolbox files can be stored here.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > ArcToolbox

Storing Toolboxes

Custom toolboxes are normally stored in the profile directory.

Use Tools>Options…>Geoprocessing to change location.

Custom Toolboxes, and any tools or models in them, can be shared by sharing the .tbx files.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > ArcToolbox

Viewing Toolboxes

Toolboxes are buried deep in ArcCatalog or when adding toolboxes to ArcToolbox.

Change this by selecting Options>General tab in ArcCatalog and setting Toolboxes as a top level entry.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > Environments

Geoprocessing Environment Settings

Default workspace, coordinate system, etc.

Environment can be set in several places

Need to watch hierarchy—can be set at tool document (model) or application level.

Settings created in ArcCatalog differ from those in ArcMap.

Untitled ArcMap document picks up the most recent ArcCatalog setting.

Common errors with geoprocessing methods are having invalid workspace, or wrong coordinate system or GDB extent.

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > Environments

Geoprocessing Settings

Tools>Options>Geoprocessing

Overwrite Outputs

Log geoprocessing toHistory

Set location of user toolboxfolder

Access Environment Settings

Add Results to Display

Set Results as temporary

All these settings can effect how Models work

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Working with ModelBuilderGeoprocessing Basics in ArcGIS 9 > Projections

Geoprocessing and Projecting Data

Some geoprocessing operations will create new data in the projection specified in the Geoprocessing Environment dialog.

Does not recognize datum transformations unless set in the Geoprocessing environment.

If input and output data have different datums, best to create the output in the same projection as the input and then project the data withappropriate datum shift.

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Working with ModelBuilderModelBuilder

What is Model Builder?

Graphical interface used to build models of processes

A way to “capture a workflow”

“Authoring environment” used to create tools

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Working with ModelBuilderModelBuilder

What is Model Builder?

A Tool to perform:

Repetitive Tasks

Suitability Models

Process Models

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Working with ModelBuilderModelBuilder

What is Model Builder?

Provides a method to run several variations of the analysis.

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Working with ModelBuilderModelBuilder

What is Model Builder?

A means to document your work.

Provides graphical documentation of the process.

Can generate separate reports as an XML document.

Can be shared and used as a template for similar analysis.

Can be exported as part of a toolbox or as an .XML document.

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Working with ModelBuilderModelBuilder

Creating a Model

Created inside a custom toolbox in ArcToolbox or a Geodatabase.

Models can be imported from ArcView 3.x models.

Can start ModelBuilder fromthe Standard Toolbar in ArcMap

Save to custom toolbox or delete when finished

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Working with ModelBuilderModelBuilder

Creating a Model

Models work only with the Tools in ArcToolbox.

“Tools” can include other models, scripts, and DLLs created with ArcObjects.

Models work with all supported data types.

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Working with ModelBuilderModelBuilder

Creating a Model

Everything in a model is an element

Tool elements (rectangular) or Variable elements (oval)

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Working with ModelBuilderModelBuilder

Creating a Model

Variables - values that can be changed in the Model

Data Variables – references data on disk or map layers

Input – data you add to model

Output – new output or modified input data

Value Variables – numbers, strings, extents, spatial references, more

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Working with ModelBuilderModelBuilder

Creating a Model

Output data typesNew output data - Data written to disk after tool is runIn/out output data - Result of tool that alters input data

Need to know tools to understand output

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Working with ModelBuilderModelBuilder

Creating a Model

Data typesDifferent tools expect different data types for input or output

Need to know what tools work with what data types

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Special Tools

There are tools that are unique to ModelBuilder or very useful in ModelBuilder.

Data Management>General>Select Data – Allows access to data inside folders, Geodatabases, or feature datasets.

Data Management>General>Merge Branch – Used to merge two or more logical processes into a single output.

Working with ModelBuilderModelBuilder

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More Special Tools -

Data Management>Layers and Table Views>

Make Feature Layer

Make Raster layer

Make Table View

Apply Symbology from Layer

Make Query Table

These are usually temporary layers usedfor model inputs

Working with ModelBuilderModelBuilder

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More Special Tools -

Some tools, such as “Select Layer by Attributes” or “Select Layer by Location”only work on layers within a map, not directly on data sources.

Use the Make Feature Layer or Make Table View to create a layer or table view as needed for data not already in the map.

Working with ModelBuilderModelBuilder

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Working with ModelBuilderModelBuilder

Creating a Model

Model Properties should be set when first creating a model.

Name should not have any spaces9.3 doesn’t like underscores

Label is what shows in ArcToolbox and on the ModelBuilder window.

Good practice to set “Store relative path names…”

Set Environments here if specific to the Model.

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Working with ModelBuilderModelBuilder

Creating a Model

Models are built by dragging tools and data into the ModelBuilder window, connecting these elements into a process or workflow, and then setting parameters or variables for the elements.

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Working with ModelBuilderModelBuilder

Creating a Model

Element color and shape indicate the type of element.

Element coloring and shading indicate status.

Uncolored elements are “not ready to run.”

If you “validate” a model, elements that no longer work lose color.

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Working with ModelBuilderModelBuilder

Creating a Model – Derived Data

Tools dragged into the MB window will contain an output element for the “Derived Data” that results from this tool.

Output file names should not have more than 13 characters. Even if you set “overwrite existing files”, ModelBuilder can crash or delete files having the same first 13 characters.

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Working with ModelBuilderModelBuilder

Creating a Model – Derived Data

Derived data can be set to Intermediate and/or Added to the Display (Table of Contents).

By default any derived data is set to Intermediate.

The final element cannot be set to Intermediate

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Working with ModelBuilderModelBuilder

Creating a Model – Derived Data

Derived data created by running a Model from the ModelBuilder window is saved to disk even if set to Intermediate.

Then the next time you open the model, the “already run” states are honored.

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Working with ModelBuilderModelBuilder

Creating a Model – Derived Data

Derived data flagged as Intermediate, created by running a modelfrom its dialog box or command line, is automatically deleted at the end of the execution of the tool.

Intermediate data can be removed manually by using the Delete Intermediate Data command from the menu.

This helps if the Model crashes when trying tooverwrite existing data.

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Working with ModelBuilderModelBuilder

Creating a Model

Models can include other Models or Scripts, dragged into the model.

Models used in another model need to have parameters set.

Scripts must be added to a toolbox in ArcToolbox and then dragged into the model window.

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Working with ModelBuilderModelBuilder

Creating a Model

Model flow can be controlled by setting preconditions.

Preconditions are properties of a tool.

Often used for branching.

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Working with ModelBuilderModelBuilder

Creating a Model

Model elements are manipulated from the context menu.

Opening a Tool opens the same dialog box as in ArcToolbox.

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Working with ModelBuilderModelBuilder

Creating a Model

Element Context menu

Open…

Model Parameter

Add to Display

Intermediate

Create Label

View Messages…

Rename…

Display Properties…

Properties…

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Working with ModelBuilderModelBuilder

Creating a Model

Element Properties… additional functionality for data elements

General – type of values and feedback variable; used with iteration.

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Working with ModelBuilderModelBuilder

Creating a Model

Element Properties…

Data Type – used to set data type when creating a stand-alone variable.

“Feature Set” data type can be used for interactive data creation.

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Working with ModelBuilderModelBuilder

Creating a Model

Element Properties…

Layer Symbology - can specify the layer symbology for derived data that will be displayed in the map.

Values used for symbology must match exactly.

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Working with ModelBuilderModelBuilder

Creating a Model

Batch Mode – for a tool input

Create a list of inputs, variables, and outputs to a tool by setting properties for the input element to a list or series of values.

List – runs the connected tool and all downstream processesfor each item in the list.

Series – runs the entire modelfor each item in the list.

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Working with ModelBuilderModelBuilder

Creating a Model

Iteration

Specify number of iterations or until a condition is satisfied.

Best to set a maximum number of iterations until the model is tested to prevent an endless loop.

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Working with ModelBuilderModelBuilder

Creating a Model

In-line variable substitution

Used to create a variable for inputs that are unknown when creating the model.

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Working with ModelBuilderModelBuilder

Creating a Model

Use zoom tools to navigate within a model.

Use Overview window to see entire model while zoomed into a detailed area.

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Working with ModelBuilderModelBuilder

Creating a Model

Elements can be arranged manually by dragging or arranged automatically.

Use Diagram Properties to specify Automatic or Manual Layout and to set properties for automatic layout.

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Working with ModelBuilderModelBuilder

Creating a Model

Labels can be attached to model elements.

Double-clicking a label lets you edit the label.

Right-clicking opens a properties box.

Standalone labels can also be placed in the model by right-clicking any blank area in the model window.

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Working with ModelBuilderModelBuilder

Running a Model

Model can be run all at once or one process at a time.

Running one process at a time is a way to check progress as you build a model.

Often necessary to run parts of models to provide inputs for downstream steps. Or could use in-line variables.

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Working with ModelBuilderModelBuilder

Validating and debugging a Model

Models can be Validated.

Validation won’t provide messages; elements with errors will turn blank.

Right-clicking tools accesses “View Messages”which describes the error.

The fix is usually to reset parameters for that tool.

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Working with ModelBuilderModelBuilder

Validating and debugging a Model

Running a Model opens the process dialog, and any errors encountered are shown in red.

Scroll through the entire dialog box, as there could be several errors.

Most common errors are that even when “Overwrite outputs of geoprocessing operations” is set, ArcGIS doesn’t always overwrite files.

Potential fix is to delete intermediate data.

Another problem is when files share the 1st same 13 characters, ArcGIS sometimes thinks there is only one file, and may inadvertently delete a file.

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Working with ModelBuilderModelBuilder

Opening Models

Models can be opened as a graphic window using Edit… or as a tool using Open… or in Batch…

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Working with ModelBuilderModelBuilder

Creating a tool\dialog from a Model

Adding parameters to data elements and creating parameters of variables for tools builds a custom dialog box for that model.

Dialog box is often easier for someone not familiar with the model to enter and change parameters.

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Working with ModelBuilderModelBuilder

Creating a tool from a Model

After a Tool has been created from a Model, the Model can be run in Batch mode.

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Working with ModelBuilderModelBuilder

Creating Reports

Reports can be viewed or saved to a file. Saving to a file is a good way to document the model for other users.

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Working with ModelBuilderModelBuilder

Exporting Graphics

The model can be exported to graphics as a .Bmp, .Jpg, .PDF, or . Emf file. Thiscan then be added to a layout.

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ModelBuilderExporting to a Script

The model can be exported a script. This can be useful because scripts can be run at the system prompt or from Python without having ArcGIS open.

This is also a good way to display the correct syntax for tools to help create scripts.

Working with ModelBuilder

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Creating Help

Custom help can be created for models.

Works like standard tool help and can include graphics.

Working with ModelBuilder

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Working with ModelBuilderModelBuilder Demonstration