topic Re: IGeometry5.ProjectEX5 - How do I determine the esriTransformDirection? in ArcObjects SDK Questions https://community.esri.com/t5/arcobjects-sdk-questions/igeometry5-projectex5-how-do-i-determine-the/m-p/350798#M9256 <HTML><HEAD></HEAD><BODY><SPAN>I think I've found the answer.&nbsp;&nbsp; IGeoTransformation.GetSpatialReferences.&nbsp; Duh!!</SPAN><BR /><BR /><SPAN>Thanks to the post at </SPAN><A href="http://gis.stackexchange.com/questions/14113/how-to-use-arcobjects-to-choose-geotransformation">http://gis.stackexchange.com/questions/14113/how-to-use-arcobjects-to-choose-geotransformation</A><SPAN> .</SPAN><BR /><BR /><SPAN>DG</SPAN></BODY></HTML> Sun, 11 Dec 2011 18:22:43 GMT DennisGeasan 2011-12-11T18:22:43Z IGeometry5.ProjectEX5 - How do I determine the esriTransformDirection? https://community.esri.com/t5/arcobjects-sdk-questions/igeometry5-projectex5-how-do-i-determine-the/m-p/350797#M9255 <HTML><HEAD></HEAD><BODY><SPAN>I'm working with the IGeometry5.ProjectEX5 method which requires a transformation direction.&nbsp; This can be either forward for reverse.&nbsp; I'm assuming this parameter is an indication of how the transformation is to be calculated.&nbsp; For example, NAD27 to WGS84 (forward??) or WGS84 to NAD27 (reverse???).&nbsp; I can't find any docs that indicate how this is defined.&nbsp; I have tried using IspatialReference3.PropjectionHint but the referenced paramamter esriTransformDirection never changes value.&nbsp; Is there another way to determine the transformation direction?</SPAN><BR /><BR /><SPAN>Dennis Geasan</SPAN><BR /><SPAN>GIS Technologies</SPAN></BODY></HTML> Sat, 10 Dec 2011 22:45:21 GMT https://community.esri.com/t5/arcobjects-sdk-questions/igeometry5-projectex5-how-do-i-determine-the/m-p/350797#M9255 DennisGeasan 2011-12-10T22:45:21Z Re: IGeometry5.ProjectEX5 - How do I determine the esriTransformDirection? https://community.esri.com/t5/arcobjects-sdk-questions/igeometry5-projectex5-how-do-i-determine-the/m-p/350798#M9256 <HTML><HEAD></HEAD><BODY><SPAN>I think I've found the answer.&nbsp;&nbsp; IGeoTransformation.GetSpatialReferences.&nbsp; Duh!!</SPAN><BR /><BR /><SPAN>Thanks to the post at </SPAN><A href="http://gis.stackexchange.com/questions/14113/how-to-use-arcobjects-to-choose-geotransformation">http://gis.stackexchange.com/questions/14113/how-to-use-arcobjects-to-choose-geotransformation</A><SPAN> .</SPAN><BR /><BR /><SPAN>DG</SPAN></BODY></HTML> Sun, 11 Dec 2011 18:22:43 GMT https://community.esri.com/t5/arcobjects-sdk-questions/igeometry5-projectex5-how-do-i-determine-the/m-p/350798#M9256 DennisGeasan 2011-12-11T18:22:43Z