Cleaning up Stacked Points

The structures we load into the editor (red dots, and points with red borders) come from two sources: the National Structures Dataset (NSD) and the Geographic Names Information System (GNIS). Because GNIS’s original purpose was to track official names rather than locations, some of the GNIS points do not have specific geographic coordinates. These points are “stacked” usually in the center of the county where the structure is located.



Cemeteries and post offices are the two feature types that may be “stacked” and in the wrong location.

This is an example of what stacked post offices look like:





If you find stacks of points please try to locate and move the points to the correct locations. Make sure to zoom in all the way or you might not be able to see them!


If another user has already created a point for that feature in the right location, or if a duplicate point exists, keep the point that has a value in the GNIS ID field, or whichever point has the smaller number in the GNIS ID field. This is how you should always deal with duplicate points if they have GNIS_IDs.

If the feature no longer exists, delete it. But before you delete any points make sure you've done sufficient research to confirm that the feature no longer exists.