You may have 3 different alternatives (scenarios An analysis contains one or more scenarios. Each scenario represents a different decision-making alternative. The first scenario in your analysis is called the base scenario. For example, it can represent existing conditions, the primary proposal under evaluation, business as usual, or the first of several alternatives you wish to compare in an analysis.) each with their own data. For example, there are 3 separate CAD subdivision site plans in 3 separate scenarios. This example could just as easily be multiple GIS data layers representing any type of distinct land use or resource management alternatives for a particular shared geography or study area. Here is one way to accomplish this task:
Create a new data layer (e.g. "Subdivision Site Plan", a polygon layer). By default, this new data layer will be located in the Scenario 360 geodatabase A geodatabase stored in Microsoft Access database format that supports many readers and a single editor. See also: geodatabase. and will be tagged as a dynamic layer A dynamic data layer is a layer that is stored in your personal geodatabase. Only dynamic data layers can contain dynamic attributes. That is, a data layer must be designated as dynamic in order for you to be able to create a formula for any of its attributes.. This will allow the layer to hold different features for different scenarios.
Create additional scenarios for each alternative now. The data layer created in step one will be empty (no features) for each scenario.
Load the predefined alternative feature data sets as non-dynamic layers. These will be listed in the table of contents of all scenarios (3 distinct CAD layers).
Start editing scenario 1. Set ArcMap selectable layers to one of the pre-defined alternatives (non-dynamic layers).
Use the ArcMap select features tool to select all features from that layer.
Use the ArcMap Edit menu to copy these features to the clipboard.
Set the editing session "target layer" to the generic empty dynamic data layer created in step 1.
Use the ArcMap Edit menu to paste these selected features to the generic dynamic data layer - thereby populating it with one of the distinct alternatives.
Stop editing the scenario and save your edits.
Create new scenario 2 and repeat steps 4-9.
Create new scenario 3 and repeat steps 4-9.
The same approach works when creating scenario-specific lookup tables. For more information on this, see Working with tables as data layers.