ArcMapAddinDistanceAndDirection.ViewModels.TabBaseViewModel.GetLinearUnit C# (CSharp) Метод

        internal ILinearUnit GetLinearUnit()
        {
            int unitType = (int)esriSRUnitType.esriSRUnit_Meter;
             if (srf3 == null)
            {
                Type srType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
                srf3 = Activator.CreateInstance(srType) as ISpatialReferenceFactory3;
            }

            switch (LineDistanceType)
            {
                case DistanceTypes.Feet:
                    unitType = (int)esriSRUnitType.esriSRUnit_Foot;
                    break;
                case DistanceTypes.Kilometers:
                    unitType = (int)esriSRUnitType.esriSRUnit_Kilometer;
                    break;
                case DistanceTypes.Meters:
                    unitType = (int)esriSRUnitType.esriSRUnit_Meter;
                    break;
                case DistanceTypes.NauticalMile:
                    unitType = (int)esriSRUnitType.esriSRUnit_NauticalMile;
                    break;
                case DistanceTypes.SurveyFoot:
                    unitType = (int)esriSRUnitType.esriSRUnit_SurveyFoot;
                    break;
                default:
                    unitType = (int)esriSRUnitType.esriSRUnit_Meter;
                    break;
            }

            return srf3.CreateUnit(unitType) as ILinearUnit;
        }