topic Does raster statistics improve drawing performance when drawn from javascript ImageServiceLayer? in ArcGIS JavaScript Maps SDK Questions https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/does-raster-statistics-improve-drawing-performance/m-p/217151#M20168 <HTML><HEAD></HEAD><BODY><P>I'm new with raster concept, so reason why I ask the question because when publish Image Service using arcpy, it shows</P><P>"Raster data source does not have statistics CODE 10010) and came across this:</P><P></P><P><A href="http://server.arcgis.com/en/server/10.3/publish-services/windows/10010-raster-layer-s-data-source-does-not-have-ima.htm" title="http://server.arcgis.com/en/server/10.3/publish-services/windows/10010-raster-layer-s-data-source-does-not-have-ima.htm">10010: Raster data source does not have statistics—Documentation&nbsp;&nbsp; (10.3 and 10.3.1) | ArcGIS for Server</A> </P><P></P><P>and it said: "<SPAN style="color: #4d4d4d; font-family: 'Lucida Grande', 'Segoe UI', Arial, sans-serif; font-size: 14px; background-color: #fefefe;">Your raster data source does not have statistics computed, which can degrade <STRONG>your raster display and potentially impact drawing performance</STRONG>."</SPAN></P><P></P><P><SPAN style="color: #4d4d4d; font-family: 'Lucida Grande', 'Segoe UI', Arial, sans-serif; font-size: 14px; background-color: #fefefe;">My understanding is that statistics only needed if we want to do raster operation.</SPAN></P><P></P><P><SPAN style="color: #4d4d4d; font-family: 'Lucida Grande', 'Segoe UI', Arial, sans-serif; font-size: 14px; background-color: #fefefe;">So if there is no operation on the raster (only display), do we need to calculate the statistics? </SPAN></P><P><SPAN style="color: #4d4d4d; font-family: 'Lucida Grande', 'Segoe UI', Arial, sans-serif; font-size: 14px; background-color: #fefefe;">If raster has statistics, is it drawn faster when ArcGIS javascript call it from "<SPAN class="typ" style="color: #000000;">ArcGISImageServiceLayer</SPAN>" API?</SPAN></P></BODY></HTML> Wed, 18 May 2016 06:41:03 GMT HenriLim 2016-05-18T06:41:03Z Does raster statistics improve drawing performance when drawn from javascript ImageServiceLayer? https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/does-raster-statistics-improve-drawing-performance/m-p/217151#M20168 <HTML><HEAD></HEAD><BODY><P>I'm new with raster concept, so reason why I ask the question because when publish Image Service using arcpy, it shows</P><P>"Raster data source does not have statistics CODE 10010) and came across this:</P><P></P><P><A href="http://server.arcgis.com/en/server/10.3/publish-services/windows/10010-raster-layer-s-data-source-does-not-have-ima.htm" title="http://server.arcgis.com/en/server/10.3/publish-services/windows/10010-raster-layer-s-data-source-does-not-have-ima.htm">10010: Raster data source does not have statistics—Documentation&nbsp;&nbsp; (10.3 and 10.3.1) | ArcGIS for Server</A> </P><P></P><P>and it said: "<SPAN style="color: #4d4d4d; font-family: 'Lucida Grande', 'Segoe UI', Arial, sans-serif; font-size: 14px; background-color: #fefefe;">Your raster data source does not have statistics computed, which can degrade <STRONG>your raster display and potentially impact drawing performance</STRONG>."</SPAN></P><P></P><P><SPAN style="color: #4d4d4d; font-family: 'Lucida Grande', 'Segoe UI', Arial, sans-serif; font-size: 14px; background-color: #fefefe;">My understanding is that statistics only needed if we want to do raster operation.</SPAN></P><P></P><P><SPAN style="color: #4d4d4d; font-family: 'Lucida Grande', 'Segoe UI', Arial, sans-serif; font-size: 14px; background-color: #fefefe;">So if there is no operation on the raster (only display), do we need to calculate the statistics? </SPAN></P><P><SPAN style="color: #4d4d4d; font-family: 'Lucida Grande', 'Segoe UI', Arial, sans-serif; font-size: 14px; background-color: #fefefe;">If raster has statistics, is it drawn faster when ArcGIS javascript call it from "<SPAN class="typ" style="color: #000000;">ArcGISImageServiceLayer</SPAN>" API?</SPAN></P></BODY></HTML> Wed, 18 May 2016 06:41:03 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/does-raster-statistics-improve-drawing-performance/m-p/217151#M20168 HenriLim 2016-05-18T06:41:03Z Re: Does raster statistics improve drawing performance when drawn from javascript ImageServiceLayer? https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/does-raster-statistics-improve-drawing-performance/m-p/217152#M20169 <HTML><HEAD></HEAD><BODY><P>According to the online documentation "Statistics are required for your raster and mosaic datasets to perform certain tasks, such as applying a contrast stretch or classifying your data".&nbsp;&nbsp; So unless you need to perform any of these operations I would say it is not required.&nbsp; You should however create overviews for enhanced drawing performance.</P></BODY></HTML> Wed, 18 May 2016 07:08:12 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/does-raster-statistics-improve-drawing-performance/m-p/217152#M20169 FC_Basson 2016-05-18T07:08:12Z