> For the complete documentation index, see [llms.txt](https://atd-dts.gitbook.io/atd-geospatial/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://atd-dts.gitbook.io/atd-geospatial/signs-markings-banners/signs-gis-maintenance/fgdb-topology.md).

# FGDB Topology

## Feature Classes

* Asset Locations
  * XY Rank of 1
  * Asset Locations will be the feature of reference for the Signs GIS data.
* Asset Signs Poles
  * XY Rank of 2
  * Asset Signs Poles will be snapped to the Asset Locations

![Signs Topology Feature Classes / Ranking](/files/-MMGcv0GYzcEARBKtbmK)

## Rules

* Asset Signs Poles - Must Coincide With - Asset Locations
  * All Asset Signs Poles must be snapped to an Asset Location point
* Asset Locations - Must Be Disjoint
  * Multiple Asset Location points can not be created in the same location

![](/files/-MMGdKD8kG0LYoTR0qDL)

## Editing

* The Pro Project you use for editing the Signs GIS Data must have the ATD\_ADMIN.Signs\_Topology included in the working Map Data Frame and the selected Topology in the Edit Toolbar at the top.
* Only the Point Errors will be used since there are no lines or polygons in the dataset.
* The Dirty Areas will be tiny purple polygons and will remain until the Topology is Validated.

![Project example showing Signs Topology](/files/-MMGcGZ1f7ggE0Ru_Fc6)

## Validation

* The Error Inspector Tool is used to Validate the Topology and to fix any errors that exist.
* Make sure to Validate the Topology every time you are finished editing in order to keep the data clean.

![Project example showing the Error Inspector Tool](/files/-MMGfn9uogtFiADsrYQD)


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