topic Re: Zoom By Scale in ArcGIS API for Silverlight Questions https://community.esri.com/t5/arcgis-api-for-silverlight-questions/zoom-by-scale/m-p/641328#M16494 <HTML><HEAD></HEAD><BODY><SPAN>As your map is in decimal degress, the conversion factor is the number of meters for one degree, i.e about 111320 ( 2 * PI * earthRadius / 360)</SPAN></BODY></HTML> Wed, 12 Oct 2011 07:45:44 GMT DominiqueBroux 2011-10-12T07:45:44Z Zoom By Scale https://community.esri.com/t5/arcgis-api-for-silverlight-questions/zoom-by-scale/m-p/641327#M16493 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I have a map service that has esriDecimalDegrees units, and I need to calculate wicth scale it is so I can zoom to scale.</SPAN><BR /><BR /><SPAN>My problem is that I can't find the factor to the esri units type, to fill the equasion above:</SPAN><BR /><BR /><SPAN>Map scale = 1 : (ScreenRes pixels/inch * 39.37 inches/meter * (Map.Resolution * conversionFactorToMeters))</SPAN><BR /><BR /><SPAN>Where can i find these convertion factors?</SPAN></BODY></HTML> Tue, 11 Oct 2011 16:59:41 GMT https://community.esri.com/t5/arcgis-api-for-silverlight-questions/zoom-by-scale/m-p/641327#M16493 jonataspovoas 2011-10-11T16:59:41Z Re: Zoom By Scale https://community.esri.com/t5/arcgis-api-for-silverlight-questions/zoom-by-scale/m-p/641328#M16494 <HTML><HEAD></HEAD><BODY><SPAN>As your map is in decimal degress, the conversion factor is the number of meters for one degree, i.e about 111320 ( 2 * PI * earthRadius / 360)</SPAN></BODY></HTML> Wed, 12 Oct 2011 07:45:44 GMT https://community.esri.com/t5/arcgis-api-for-silverlight-questions/zoom-by-scale/m-p/641328#M16494 DominiqueBroux 2011-10-12T07:45:44Z