topic Re: Image service - what scale is source data accessed? in ArcGIS Image Server Questions https://community.esri.com/t5/arcgis-image-server-questions/image-service-what-scale-is-source-data-accessed/m-p/233916#M1097 <HTML><HEAD></HEAD><BODY><SPAN>There is a direct relation between pixel size and map scale.</SPAN><BR /><BR /><SPAN>ScaleFactor = Cell Size x 96/0.0254</SPAN><BR /><SPAN>Therefore, if the scale is 1:20,000, the cell size is 5.29 meters.</SPAN><BR /><BR /><SPAN>Cell Size = ScaleFactor x 0.0254/96</SPAN><BR /><SPAN>Therefore, if the cell size is 5 meters, the scale is 1:18,898.</SPAN><BR /><BR /><SPAN>The scale at which the overviews will be displayed is the MinPS value of the Service overviews * 96/0.0254. (Since the base imagery take priority, it is actually more correct to use the MaxPS of the base imagery, but this is generally set the same as the minPS of the overviews)</SPAN><BR /><BR /><SPAN>Note that overviews need not have the same scale at all locations. If the resolution of the base imagery varies then the minPS of the overviews may also be different in different areas.</SPAN></BODY></HTML> Mon, 09 Aug 2010 14:46:16 GMT PeterBecker 2010-08-09T14:46:16Z Image service - what scale is source data accessed? https://community.esri.com/t5/arcgis-image-server-questions/image-service-what-scale-is-source-data-accessed/m-p/233915#M1096 <HTML><HEAD></HEAD><BODY><SPAN>Hi.&nbsp; Is it possible to tell at what scale when the user no longer sees service overviews and is viewing the source images (i.e. full resolution data)?&nbsp; Is there something in the service definition that indicates or controls this?</SPAN><BR /><BR /><SPAN>Thanks</SPAN></BODY></HTML> Fri, 06 Aug 2010 03:21:28 GMT https://community.esri.com/t5/arcgis-image-server-questions/image-service-what-scale-is-source-data-accessed/m-p/233915#M1096 Will 2010-08-06T03:21:28Z Re: Image service - what scale is source data accessed? https://community.esri.com/t5/arcgis-image-server-questions/image-service-what-scale-is-source-data-accessed/m-p/233916#M1097 <HTML><HEAD></HEAD><BODY><SPAN>There is a direct relation between pixel size and map scale.</SPAN><BR /><BR /><SPAN>ScaleFactor = Cell Size x 96/0.0254</SPAN><BR /><SPAN>Therefore, if the scale is 1:20,000, the cell size is 5.29 meters.</SPAN><BR /><BR /><SPAN>Cell Size = ScaleFactor x 0.0254/96</SPAN><BR /><SPAN>Therefore, if the cell size is 5 meters, the scale is 1:18,898.</SPAN><BR /><BR /><SPAN>The scale at which the overviews will be displayed is the MinPS value of the Service overviews * 96/0.0254. (Since the base imagery take priority, it is actually more correct to use the MaxPS of the base imagery, but this is generally set the same as the minPS of the overviews)</SPAN><BR /><BR /><SPAN>Note that overviews need not have the same scale at all locations. If the resolution of the base imagery varies then the minPS of the overviews may also be different in different areas.</SPAN></BODY></HTML> Mon, 09 Aug 2010 14:46:16 GMT https://community.esri.com/t5/arcgis-image-server-questions/image-service-what-scale-is-source-data-accessed/m-p/233916#M1097 PeterBecker 2010-08-09T14:46:16Z