topic Is base map imagery orthorectified? in Data Management Questions https://community.esri.com/t5/data-management-questions/is-base-map-imagery-orthorectified/m-p/235600#M13360 <HTML><HEAD></HEAD><BODY><SPAN>I assume that since I can take measurements using the Measure tool that the imagery is orthorectified but I cannot find a straight forward answer as to whether or not I can rely on the imagery as being true to what is on the ground.&nbsp; Also, because the base map is titled "imagery" that means it is from a satellite.&nbsp; Otherwise it would be called photography if it were taken from an aircraft? Thanks. - Sean</SPAN></BODY></HTML> Sun, 21 Apr 2013 16:59:14 GMT SeanFisher 2013-04-21T16:59:14Z Is base map imagery orthorectified? https://community.esri.com/t5/data-management-questions/is-base-map-imagery-orthorectified/m-p/235600#M13360 <HTML><HEAD></HEAD><BODY><SPAN>I assume that since I can take measurements using the Measure tool that the imagery is orthorectified but I cannot find a straight forward answer as to whether or not I can rely on the imagery as being true to what is on the ground.&nbsp; Also, because the base map is titled "imagery" that means it is from a satellite.&nbsp; Otherwise it would be called photography if it were taken from an aircraft? Thanks. - Sean</SPAN></BODY></HTML> Sun, 21 Apr 2013 16:59:14 GMT https://community.esri.com/t5/data-management-questions/is-base-map-imagery-orthorectified/m-p/235600#M13360 SeanFisher 2013-04-21T16:59:14Z Re: Is base map imagery orthorectified? https://community.esri.com/t5/data-management-questions/is-base-map-imagery-orthorectified/m-p/235601#M13361 <HTML><HEAD></HEAD><BODY><SPAN>I've been using the Bing maps basemap. depending on where I am looking I change the basemap project in the Layer to the projection I use for other data. I usually use UTM. So if I know the area I'm looking in is UTM 13N I change the layer projection to UTM 13N. Worked for me so far!</SPAN><BR /><BR /><SPAN>On another note, don't always assume that imagery is only associated with data acquired from satellites. Digital aerial imagery is recorded with a digital camera from aircraft. I've gotten myself in trouble with folks before calling them digital photos whereas they apparently should be called digital imagery! Just passing on a lesson I learned the hard way, rather than calling you out on it...</SPAN><BR /><BR /><SPAN>Also, for basemaps such as Bing they use a combination of satellite imagery and aerial imagery and photos.</SPAN></BODY></HTML> Sun, 28 Apr 2013 01:23:28 GMT https://community.esri.com/t5/data-management-questions/is-base-map-imagery-orthorectified/m-p/235601#M13361 SamCoggins1 2013-04-28T01:23:28Z