• Workbench Basics
    • About FME Workbench
      • Welcome to FME Workbench
      • Copyright and Trademark Notices
      • About FME
      • FME Terminology
      • Download the Transformer Quick-Reference Guide
      • Support and Resources
    • Understanding Schema
    • Creating Workspaces
      • Using the Workspace Dialog
      • About Dynamic Workspaces
      • About Templates
      • Copying Between Workspaces
      • Copying Workspaces to Mapping Files
    • Running and Debugging Workspaces
      • About Data Inspection
      • About Feature Inspection
      • Temporarily Disabling Connections
      • Running a Batch Translation
      • Working with Command Files
      • Stopping a Translation
      • Viewing the Log
    • Organizing Workspaces
      • Using Annotations
      • Using Bookmarks
      • Hiding Connections
    • About the FME Data Inspector
      • Data Inspector Interface
      • Types of Datasets
      • Selecting a Dataset to View
      • Querying Features
    • User Interface Reference
      • Starting FME Workbench
      • FME Options
      • Menus, Tools and Options
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      • FME 2017 Workbench Keyboard Shortcuts
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      • Setting the Feature Count Display
      • Viewing Rejected Features
      • Window Management
  • Reading and Writing Data
    • Terminology
    • Dataset Types
    • Adding Readers
      • Quick Add
    • Merging Similar Datasets
    • Adding a Reader as a Resource
    • Adding Writers
      • Quick Add
    • Readers and Writers: Zip Files and URLs
      • Reading from a Zip File
      • Writing to a Zip File
      • Reading from a URL
    • Defining Destination Data Characteristics
    • Deriving Destination Schema from Schema Feature
    • Updating Readers and Writers
    • Performing Other Tasks with Readers and Writers
    • Feature Types and Attributes
      • Mapping Attributes from Reader to Writer
      • Managing Feature Types
      • Updating Feature Types
      • Feature Type and Attribute Menu Reference
      • Editing Reader Feature Types
      • Editing Writer Feature Types
      • Modifying Feature Types to Read
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      • Controlling Features with Format Attributes
      • Managing Attribute Connections
      • Adding and Copying Attributes
      • Editing Geodatabase Domains and Subtypes
    • Separating Output Data with Fanout
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    • Custom Formats
      • Creating a Custom Format
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  • Transforming Data
    • Understanding Content Transformation
    • Adding, Connecting and Removing Transformers
      • Quick Add
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      • FME Server Parameters
      • Arithmetic Editor
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      • Incomplete Transformers
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    • Download the Transformer Reference Guide
    • Custom Transformers
      • Creating Custom Transformers
      • Using Custom Transformers
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      • Duplicating Custom Transformers
      • Working with Multiple Copies of Custom Transformers
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  • Other Workbench Tasks
    • Working with User Parameters
      • Creating and Modifying User Parameters
      • Creating a User Parameter Based on a Workspace Parameter
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      • Running a Workspace with Published Parameters
    • About List Attributes
      • Understanding List Attributes
      • How List Attributes Are Created
      • Exposing List Attributes
      • Operating on List Attributes
    • Understanding FME Geometry
      • Geometry Concepts
      • FME Geometry Model
    • Working with Coordinate Systems
      • Key Concepts in Coordinate Systems and Mapping
      • How FME Identifies Coordinate Systems
      • Choosing from the Coordinate System Gallery
      • Reprojecting Data
      • Reverting to Original Coordinate Systems
      • Search Envelopes and Coordinate Systems
      • Custom Coordinate Systems
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      • Defining New Ellipsoids
      • Predefined Units
      • Defining Custom Units
      • Quadrants
    • Working with FME Server
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      • Importing Custom Python Modules to FME Server
      • Downloading from FME Server
      • Viewing Connection Information
    • Working with Databases and Web Services
      • Using Database Connections
      • Using Web Connections
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    • FME Administration Tasks
      • Extending Applications with the Integration Console
      • FME Files: Names and Locations
      • Daylight Savings Time
      • Adjusting Memory Resources
      • License Borrowing
  • All Files
  • Other Workbench Tasks
    • Working with User Parameters
    • About List Attributes
    • Understanding FME Geometry
      • Geometry Concepts
        • Transformation Matrix
        • Sidedness
        • Appearances
        • Textures
        • Rasters
        • Texture Coordinates
        • Vertex Normals
      • FME Geometry Model
        • Nulls (IFMENull)
        • Points (IFMEPoint)
        • Text (IFMEText)
        • Curves (IFMECurve)
        • Areas (IFMEArea)
        • Surfaces (IFMESurface)
        • Solids (IFMESolid)
        • Rasters (IFMERaster)
        • Point Clouds (IFMEPointCloud)
        • Multis
        • Aggregates (IFMEAggregate)
        • Feature Tables (IFMEFeatureTable)
        • Geometry Definitions and Instances
        • Multiple Geometries
    • Working with Coordinate Systems
    • Working with FME Server
    • Working with Databases and Web Services
    • FME Administration Tasks
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FME Geometry

FME manages data from hundreds of different formats, systems, and transformations. The definitions of what constitutes "valid" geometry or topology vary widely.