In set theory, the union (denoted by ∪) of a collection of sets is the set of all distinct elements in the collection. It is one of the fundamental operations through which sets can be combined and related to each other.

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Erase within a feature class - Planar enforcement

I´m using ArcGIS v10 ArcInfo. I´m working with a feature class that has 5 features which are waterdepths (1 to 5m). These features are overlapping each other. What I need, is that they are not ...
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PROBLEM SQL SERVER UNION of geography feature : FULLGLOBE result

I have some trouble with sql server 2012. I store coordinates of french cities in my database as geography object (with ESRI 4326) and i want to make the UNION of some cities. I have in result ...
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Changing polyline vertex followed be union causes exception

I'm new to this arcobject stuff. I'm trying to change the last vertex on a polyline feature. (using C#) After the change I need to add this changed polyline into another. It seemed to work except if ...