https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/the-conversion-method-of-scale-and-resolution-in/m-p/1197829#M78121 <P>I want use the `lod.scale` to calculate resolution with custom method, but the result is difference with lod.resolution. like this:</P><P>&nbsp;</P><LI-CODE lang="javascript">// wkid: 4490 // json result const source = { scale: 5000000, resolution: 0.011897305029151402 } // custom method const metersPerInch = 0.0254; const dpi = 96; const metersPerDegrees = (2 * Math.PI * 6378137) / 360; const customResolution = ((metersPerInch / dpi) * source.scale) / metersPerDegrees; // customResolution = 0.011897305029149903 // difference = 1.4988010832439613e-15</LI-CODE><P>&nbsp;</P><P>thank your!</P> Mon, 01 Aug 2022 04:33:27 GMT yujinpan 2022-08-01T04:33:27Z https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/the-conversion-method-of-scale-and-resolution-in/m-p/1197829#M78121 <P>I want use the `lod.scale` to calculate resolution with custom method, but the result is difference with lod.resolution. like this:</P><P>&nbsp;</P><LI-CODE lang="javascript">// wkid: 4490 // json result const source = { scale: 5000000, resolution: 0.011897305029151402 } // custom method const metersPerInch = 0.0254; const dpi = 96; const metersPerDegrees = (2 * Math.PI * 6378137) / 360; const customResolution = ((metersPerInch / dpi) * source.scale) / metersPerDegrees; // customResolution = 0.011897305029149903 // difference = 1.4988010832439613e-15</LI-CODE><P>&nbsp;</P><P>thank your!</P> Mon, 01 Aug 2022 04:33:27 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/the-conversion-method-of-scale-and-resolution-in/m-p/1197829#M78121 yujinpan 2022-08-01T04:33:27Z