MgSelection object).
Selections can be created programatically with the Web API. This is done by querying data in a feature source, creating a feature reader that contains the features, then converting the feature reader to a selection (MgFeatureQueryOptions object.
To create a feature reader, apply a selection filter to a feature class in the feature source. A selection filter can be a basic filter, a spatial filter, or a combination of the two. The filter is stored in anBasic filters are used to select features based on the values of feature properties. For example, you could use a basic filter to select all roads that have four or more lanes.
Spatial filters are used to select features based on their geometry. For example, you could use a spatial filter to select all roads that intersect a certain area.