topic Can ArcGIS recognize the correct pixel size for the aerial photos? in ArcGIS Online Questions https://community.esri.com/t5/arcgis-online-questions/can-arcgis-recognize-the-correct-pixel-size-for/m-p/727435#M36050 <HTML><HEAD></HEAD><BODY><P><SPAN style="font-size: 16.0pt;">Dear all</SPAN></P><P><SPAN style="font-size: 16.0pt;">If I have an image that I do not know the source of, and I want to know the size of the pixel, can I do that? (I attached an image to show which data I am looking for) </SPAN></P><P><SPAN style="font-size: 16.0pt;">Thank you </SPAN></P></BODY></HTML> Tue, 06 Oct 2015 11:51:14 GMT Nassar_Abujabal 2015-10-06T11:51:14Z Can ArcGIS recognize the correct pixel size for the aerial photos? https://community.esri.com/t5/arcgis-online-questions/can-arcgis-recognize-the-correct-pixel-size-for/m-p/727435#M36050 <HTML><HEAD></HEAD><BODY><P><SPAN style="font-size: 16.0pt;">Dear all</SPAN></P><P><SPAN style="font-size: 16.0pt;">If I have an image that I do not know the source of, and I want to know the size of the pixel, can I do that? (I attached an image to show which data I am looking for) </SPAN></P><P><SPAN style="font-size: 16.0pt;">Thank you </SPAN></P></BODY></HTML> Tue, 06 Oct 2015 11:51:14 GMT https://community.esri.com/t5/arcgis-online-questions/can-arcgis-recognize-the-correct-pixel-size-for/m-p/727435#M36050 Nassar_Abujabal 2015-10-06T11:51:14Z Re: Can ArcGIS recognize the correct pixel size for the aerial photos? https://community.esri.com/t5/arcgis-online-questions/can-arcgis-recognize-the-correct-pixel-size-for/m-p/727436#M36051 <HTML><HEAD></HEAD><BODY><P>No...without a coordinate system, it is not possible to translate the size of a pixel (width and height) to ground based units. You have to go through the<A href="http://desktop.arcgis.com/en/desktop/latest/manage-data/raster-and-images/fundamentals-for-georeferencing-a-raster-dataset.htm"> georeferencing process</A></P></BODY></HTML> Tue, 06 Oct 2015 12:45:08 GMT https://community.esri.com/t5/arcgis-online-questions/can-arcgis-recognize-the-correct-pixel-size-for/m-p/727436#M36051 DanPatterson_Retired 2015-10-06T12:45:08Z