topic Re: IArea and measure unit in ArcObjects SDK Questions https://community.esri.com/t5/arcobjects-sdk-questions/iarea-and-measure-unit/m-p/552534#M14955 <HTML><HEAD></HEAD><BODY><SPAN>IArea uses whatever units are defined by the geometry's spatial reference.&nbsp; If the spatial reference is not set, then the units are unknown.&nbsp; To convert the area units to a specific unit, you apply the appropriate conversion factor.&nbsp; In cases where the geometry has a geographic coordinate system, you will want to project that geometry into an appropriate projected coordinate system in order to have linear units to use for the conversion.</SPAN></BODY></HTML> Fri, 27 Aug 2010 12:23:05 GMT NeilClemmons 2010-08-27T12:23:05Z IArea and measure unit https://community.esri.com/t5/arcobjects-sdk-questions/iarea-and-measure-unit/m-p/552533#M14954 <HTML><HEAD></HEAD><BODY><SPAN>Dear all </SPAN><BR /><SPAN>I used IArea interface to get area of a polygon, but I don't know exactly which is returned unit.</SPAN><BR /><SPAN>I suppose it returns the area value using the same unit from the layer where the polygon is, but:</SPAN><BR /><SPAN>how to convert the area to square kilometers?</SPAN><BR /><BR /><SPAN>Thanks</SPAN></BODY></HTML> Fri, 27 Aug 2010 07:30:29 GMT https://community.esri.com/t5/arcobjects-sdk-questions/iarea-and-measure-unit/m-p/552533#M14954 MarioLeggio 2010-08-27T07:30:29Z Re: IArea and measure unit https://community.esri.com/t5/arcobjects-sdk-questions/iarea-and-measure-unit/m-p/552534#M14955 <HTML><HEAD></HEAD><BODY><SPAN>IArea uses whatever units are defined by the geometry's spatial reference.&nbsp; If the spatial reference is not set, then the units are unknown.&nbsp; To convert the area units to a specific unit, you apply the appropriate conversion factor.&nbsp; In cases where the geometry has a geographic coordinate system, you will want to project that geometry into an appropriate projected coordinate system in order to have linear units to use for the conversion.</SPAN></BODY></HTML> Fri, 27 Aug 2010 12:23:05 GMT https://community.esri.com/t5/arcobjects-sdk-questions/iarea-and-measure-unit/m-p/552534#M14955 NeilClemmons 2010-08-27T12:23:05Z