CreateFlowMap

The CreateFlowMap method creates a flow map. Flow map properties are edited through the returned FlowMap object.

Syntax

object.CreateFlowMap( BoundaryFileName, DataFileName, DataTableName, BoundaryFileOptions, FlowMethod, PIDCol, EPIDCol, VarCol )

Parameter	Type	Description
BoundaryFileName	String	optional; boundary file name
DataFileName	String	optional; data file name
DataTableName	String	optional; table name if a database file is used
BoundaryFileOptions	String	optional; see Boundary File Options
FlowMethod	MVFlowMethod	optional; overlay curves or connect centroids
PIDCol	Integer	optional; primary ID or start primary ID column (depends on FlowMethod), column A equals 1
EPIDCol	Integer	optional; end primary ID column (with mvFlowConnectEnds), column A equals 1
VarCol	Integer	optional; variable column, column A equals 1

Example

This example creates a flow map that connects the boundary centroids with flow lines.

Sub Main

'Declare the variable that will reference the application

Dim mvapp As Object

'Creates an instance of the MapViewer Application object

' and assigns it to the variable named "mvapp"

Set mvapp = CreateObject("MapViewer.Application")

'Make MapViewer visible

mvapp.Visible = True

'Declare Plot as Object

Dim Plot As Object

'Creates a new map window

Set Plot = mvapp.Documents.Add(mvDocPlot)

'Declare FlowMap as object

Dim FlowMap As Object

'Create a flow map using the connect centroids method

Set FlowMap = Plot.CreateFlowMap(BoundaryFileName:= mvapp.ApplicationFolder + "\Samples\us50ll.gsb", DataFileName:= mvapp.ApplicationFolder + _

"\ Samples\flow.dat", FlowMethod:= mvFlowConnectEnds, PIDCol:=1, _

EPIDCol:=2, VarCol:=3 )

End Sub