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Simple vs Non Simple

BartHound

When is a Parcel polygon a Non Simple Geometry? I recently ran the invalid Check for our parcel layer and it came up with 2 problem polygons that were listed as non simple polygons. Not sure why that would be the case, though.

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michellej

Hello.

Unfortunately, the Repair Geometry geoprocessing tool does not work on enterprise geodatabases.

But if you look at what that tool does, you could probably find other tools to do what it's doing. For example, some of the more common geometry issues that I come across are NULL geometries. You can use Select By Attribute to select where the Shape_Area or Shape_Length is NULL or 0 and then Delete those features.

Another is polylines with duplicate vertices. You can use Generalize or Simplify Line to remove excess vertices.

Good Luck!

michellej.

AnastasiyaGrecu

Hello Michelle,

Do you know if there is a way to repair geometry and address "bad geometry" issues in SDE environment?

Anastasiya

michellej

Have you checked out the Repair Geometry GP tool?

PhuNguyen

How i can auto repair it? (Not use Sketch Properties in Edit mode). Thanks

michellej

BTW - at 10 SP3, we now capture non-simple geometries as feature records instead of row records. So you'll be able to double-click on the record in the Reviewer table and be taken directly to that feature.

TedCronin

All invalid geometry errors are captured as ROW errors. That's why you do not see a Reviewer geometry associated to the error record.

I did not realize that all invalids were captured this way. Will need to re inspect my editors work. Thank you Michelle.

michellej

All invalid geometry errors are captured as ROW errors. That's why you do not see a Reviewer geometry associated to the error record.

TedCronin

We are seeing non simple for our Parcel Lines show up as rows only with no associated geometry feature, very strange... Will continue investigating. Looking forward to SP1. If you can give Daryl a pat on the back for me.

michellej

The problem could potentially be that there are some vertices that are within the database tolerance. You can investigate those features in the Sketch Properties in Edit mode.

TedCronin

What software was used to capture the parcel layer?

Have you run the Check Geometry geoprocessing tool? What happens?

Have you run the Repair Geometry geoprocessing tool? What happens?

Workstation ArcInfo
Repair and Check do not work with SDE Data Layers.

TedCronin

A feature is considered Not Simple when its geometry is topologically incorrect. Please see the following link regarding ITopologicalOperator.Simplify Method:

http://help.arcgis.com/en/sdk/10.0/arcobjects_cpp/componenthelp/index.html#/Simplify_Method/000w000003w0000000/

What software was used to capture the parcel layer?

Have you run the Check Geometry geoprocessing tool? What happens?

Have you run the Repair Geometry geoprocessing tool? What happens?

I will chime in here for Bart, since he is home sick, the data was input via COGO, it may have been Workstation for these two polygons. As far as I know both of these tools were not run on the data, so thank you we will investigate these further with these two tools. I too, have seen some non simple lines, but they make sense, in that they are typically lines that need exploding, and the polys that I have seen were for Books/Pages, and one can clearly see where the issues are, so I will need to recheck with Bart when he makes it in, hopefully later this week.

Thanks again Dan for your assistance in this matter.

dan_hopkins

A feature is considered Not Simple when its geometry is topologically incorrect. Please see the following link regarding ITopologicalOperator.Simplify Method:

http://help.arcgis.com/en/sdk/10.0/arcobjects_cpp/componenthelp/index.html#/Simplify_Method/000w000003w0000000/

What software was used to capture the parcel layer?

Have you run the Check Geometry geoprocessing tool? What happens?

Have you run the Repair Geometry geoprocessing tool? What happens?

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