ArcSDEGridSnapper

From Fmepedia

ArcSDEGridSnapper is a Workbench Transformer.

Simulates the ArcSDE 9.1 conversion on a feature by performing ArcSDE translation, scaling, and coordinate snapping. Useful in verifying what the data will look like once it is in an ArcSDE.

When writing to SDE 9.1, things are not always so simple. Coordinates in low precision are stored in database as 31 bit positive integers. Features will be rejected where their coordinates have a greater precision than is allowed for in the database. When snapping features to the SDE grid, self-intersections can be introduced by ArcSDE itself!

The ArcSDEGridSnapper requires the following information: a false origin for x,y,z coordinate values and a scale factor. The ArcSDEGridSnapper simulates coordinate transformation and records duplicates. It will snap all feature coordinates to match the precision specified, thus making the feature compatible with your ArcSDE database. It's a much preferable alternative to the CoordinateRounder.

By quickly simulalating data conversion to ArcSDE 9.1, the ArcSDEGridSnapper allows for the analysis of data accuracy. The problematic data output from the ArcSDEGridSnapper can be further processed in the workspace (removal of dangles/sliver polygons for example) before the data is loaded into SDE.

Please see the link to see what ESRI considers valid geometry in ArcSDE: ESRI's Page on Shape Validation (http://edndoc.esri.com/arcsde/9.1/general_topics/shape_validation.htm)