New in FME 2013 - Combines the functionality of SelfIntersector, OGCGeometryValidator and more… into one transformer - 2D & 3D Validation Tests Enables you to - Check for and repair invalid geometries - Select the issues you wish to detect - Repair common issues

1. Lightning Talk: Introducing
the GeometryValidator
Tony Kent
Applications Engineer
IMGS
FME World Tour, April 2013

2. GeometryValidator
 New in FME 2013
 Combines the functionality of SelfIntersector,
OGCGeometryValidator and more… into one transformer
 2D & 3D Validation Tests
 Enables you to
 Check for and repair invalid geometries
 Select the issues you wish to detect
 Repair common issues
 Enhanced feedback - Reports information about issues with
attributes and geometry

3. Geometry Validation
 Detection
PASSED detection
FAILED detection
 Repair
PASSED detection
FAILED to repair
REPAIRED fully
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Only repair if applicable – some
systems/organisation might not want
to repair
Issue Reporting
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
.issue_found
.location_sample.x
.location_sample.y
etc

5. Validation Tests
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12 tests so far and more will be added
NaNs or infinities
Null geometry parts
Duplicate consecutive points
Degenerate or corrupt geometries
Self-intersections
Missing vertex normals
OGC simple and valid – not repairable
OGC Examples

6. Things to Keep in Mind
 Ordering of issues is important
Example
1_self_then_OGC.fmw
 Certain repairs may change geometry type
 Some business rules need to be applied, only repair if
applicable
 General strategy
 Reduce input down to 1 feature. This should always be
possible.
 Separate GeometryValidators into a minimum set of
single-operation validations.

7. Issue Reporting
 General Description stored in attribute
 Issue location stored as a geometry trait
 Stores information on multiple issues
Example
3_GVLogger.fmw

8. MyPlan.ie
 Upload LA Development Plans
 Prior to submitting data, checks need to be made
 Don’t pass, not accepted for upload
 Geometry checks
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Self-intersections
Overlaps
Slivers
Empty parts
Unclosed rings
Null Geometries
Example
MyPlanGV.fmw

9. 3D Geometry Validation
 Checks for solids with inverted faces, dangling
surfaces, unsealed solids, etc.
 Flag errors with meaningful attributes and
geometric locations of the errors.
 Repair option for 3D surfaces and solids.

10. 3D Validation - Detection

11. 3D Validation - Repair

12. Questions