Labeling data with unit conversion (Maritime Charting)

You can display values in labels with the appropriate rounding rule applied.

Schritte:

1. Start ArcMap.
2. On the main menu, click Customize > Toolbars > Labeling.
3. Klicken Sie auf die Schaltfläche Beschriftungs-Manager auf der Werkzeugleiste Beschriftung.
4. Aktivieren Sie das Kontrollkästchen neben dem Layer, dem Sie Beschriftungen hinzufügen möchten.

   Wählen Sie optional den Layer aus, und erstellen Sie Beschriftungsklassen.

5. Wählen Sie unter dem Layer eine Beschriftungsklasse.
6. Click Expression.
7. From the Label Expression dialog box, enter or load the appropriate label expression.

   The following is an example of an expression to apply a rounding rule for labeling. You may have to replace DEPTH_M and DEPTH_M_RR with the field names that apply to your label.

   Function FindLabel ( [DEPTH_M], [DEPTH_M_RR] ) 
     if ISNULL( [DEPTH_M_RR] ) then
       FindLabel = ""
     else
       set ipLabelHelper = CreateObject("ESRI.Production.Nautical.LabelHelperClass")
       set ipRounder = ipLabelHelper.GetUnitsRounder( [DEPTH_M_RR] )
       if ipRounder Is Nothing then
         FindLabel = ""
       else
         set ipValue = ipRounder.Round( [DEPTH_M] )
         FindLabel = "<CLR red='1' green='1' blue='1'><BOL><FNT name=""Arial"" size=""12"">" &  ipValue.IntegerString & "</FNT><FNT name=""Arial"" size=""15""><SUB>" & ipValue.FractionalString & "</SUB></FNT></BOL></CLR>"
       end if
     end if
   End Function
   

8. Click Verify to make sure there are no syntax errors and click OK.
9. Click OK to close the Label Manager dialog box.

   Features are labeled with the appropriate rounding rule applied to the destination field. If unit destination values are updated, the appropriate rounding is reapplied for the labels.