Data Sources (Geospatial Modeling Wizard)

A data source can be a dBase file that is provided with the shape file, an IBM® SPSS® Statistics data file, or an open dataset in the current session.

Context Data. A context data identifies features on the map. A context data can also contain fields that can be used as inputs for the model. To use a context dBase (.dbf) file that is associated with a map shape (.shp) file, the context dBase file must be in the same location as the shape file and must have the same root name. For example, if the shape file is geodata.shp, the dBase file must be named geodata.dbf

Event Data. Event data contains information on events that occur, such as crimes or accidents. This option is available only for geospatial association rules.

Point Density. Time interval and coordinate data for kernel density estimates. This option is available only for spatial temporal prediction.

Add. Opens a dialog for adding data sources. A data source can be a dBase file that is provided with the shape file, an IBM SPSS Statistics data file, or an open dataset in the current session.

Associate. Opens a dialog for specifying the identifiers (coordinates or keys) used to associate data with maps. Each data source must contain one or more identifiers that associate the data with the map. dBase files that come with a shape file typically contain a field that is automatically used as the default identifier. For other data sources, you must specify the fields that are used as identifiers.

Validate Key. Opens a dialog to validate key matching between the map and the data source.

Geospatial association rules

  • At least one data source must be an event data source.
  • All event data sources must use the same form of map association identifiers: coordinates or key values.
  • If the event data sources are associated with the maps with key values, all event sources must use the same map feature type (for example, polygons, points, lines).

Spatial temporal prediction

  • There must be a context data source.
  • If there is only one data source (a data file with no associated map), it must include coordinate values.
  • If you have two data sources, one data source must be context data, and the other data source must be point density data.
  • You cannot include more than two data sources.