topic Re: MrSid images: No Projection in Data Management Questions https://community.esri.com/t5/data-management-questions/mrsid-images-no-projection/m-p/33939#M1893 <HTML><HEAD></HEAD><BODY><SPAN>Thanks. </SPAN><BR /><BR /><SPAN>There are TIF images delivered in the same project that are geo-referenced and display well with projection. </SPAN><BR /><BR /><SPAN>These MrSid images have associated text files (GCP) that indicates geo-referencing. Say 4 to 6 image coordinates &amp; map coordinates per image.</SPAN></BODY></HTML> Fri, 26 Apr 2013 12:46:43 GMT D__SamuelRajasekhar 2013-04-26T12:46:43Z MrSid images: No Projection https://community.esri.com/t5/data-management-questions/mrsid-images-no-projection/m-p/33937#M1891 <HTML><HEAD></HEAD><BODY><SPAN>Hello All,</SPAN><BR /><BR /><SPAN>I have received numerous MrSid images (historic aerial photographs - geo-referenced, most probably). </SPAN><BR /><BR /><SPAN>When I open them in ArcMap (or ERDAS Imagine), they are not projected and without any projection information.</SPAN><BR /><BR /><SPAN>I tried to look for header or other files and none are present. The image information likewise yields a blank for coordinate system. </SPAN><BR /><BR /><SPAN>Can anyone provide some insights? Does the compression has something to do with this?</SPAN><BR /><BR /><SPAN>thanks,</SPAN><BR /><SPAN>Samuel</SPAN></BODY></HTML> Fri, 26 Apr 2013 11:51:21 GMT https://community.esri.com/t5/data-management-questions/mrsid-images-no-projection/m-p/33937#M1891 D__SamuelRajasekhar 2013-04-26T11:51:21Z Re: MrSid images: No Projection https://community.esri.com/t5/data-management-questions/mrsid-images-no-projection/m-p/33938#M1892 <HTML><HEAD></HEAD><BODY><SPAN>If there is no coordinate information at all, then they are not georeferenced.</SPAN><BR /><BR /><SPAN>Many of these older aerials have the section corners and potentially other benchmarks that may help you to georeference them.</SPAN></BODY></HTML> Fri, 26 Apr 2013 12:31:00 GMT https://community.esri.com/t5/data-management-questions/mrsid-images-no-projection/m-p/33938#M1892 JoshWhite 2013-04-26T12:31:00Z Re: MrSid images: No Projection https://community.esri.com/t5/data-management-questions/mrsid-images-no-projection/m-p/33939#M1893 <HTML><HEAD></HEAD><BODY><SPAN>Thanks. </SPAN><BR /><BR /><SPAN>There are TIF images delivered in the same project that are geo-referenced and display well with projection. </SPAN><BR /><BR /><SPAN>These MrSid images have associated text files (GCP) that indicates geo-referencing. Say 4 to 6 image coordinates &amp; map coordinates per image.</SPAN></BODY></HTML> Fri, 26 Apr 2013 12:46:43 GMT https://community.esri.com/t5/data-management-questions/mrsid-images-no-projection/m-p/33939#M1893 D__SamuelRajasekhar 2013-04-26T12:46:43Z