topic Creating Link File for the Warp From File Tool in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/creating-link-file-for-the-warp-from-file-tool/m-p/435918#M6127 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I'm trying to use the "Warp From File" tool under Data Management Tools&gt;Projections and Transformations&gt;Raster. It asks for a link file for the control points. I created a tab delimited text file using excel; plotting X coordinates in Column A and Y Coordinates in Column B with a row missing to separate the Source Coordinates and the Target Coordinates (Image).</P><P></P><P>This didn't work.</P><P></P><P>Is there any reference on how the link file should be created? All I know is that the format is a .txt file. Is it best to use comma, space, tab delimited text? Do I need to add Source and Target header information? There is nothing on this subject. I know it looks like the X and Y coordinates are reversed in the source coordinates, but this is correct.&nbsp;</P><P></P><P>Thank you to anyone who replies!</P></BODY></HTML> Fri, 04 Aug 2017 20:49:31 GMT AkhilChopra 2017-08-04T20:49:31Z Creating Link File for the Warp From File Tool https://community.esri.com/t5/arcgis-spatial-analyst-questions/creating-link-file-for-the-warp-from-file-tool/m-p/435918#M6127 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I'm trying to use the "Warp From File" tool under Data Management Tools&gt;Projections and Transformations&gt;Raster. It asks for a link file for the control points. I created a tab delimited text file using excel; plotting X coordinates in Column A and Y Coordinates in Column B with a row missing to separate the Source Coordinates and the Target Coordinates (Image).</P><P></P><P>This didn't work.</P><P></P><P>Is there any reference on how the link file should be created? All I know is that the format is a .txt file. Is it best to use comma, space, tab delimited text? Do I need to add Source and Target header information? There is nothing on this subject. I know it looks like the X and Y coordinates are reversed in the source coordinates, but this is correct.&nbsp;</P><P></P><P>Thank you to anyone who replies!</P></BODY></HTML> Fri, 04 Aug 2017 20:49:31 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/creating-link-file-for-the-warp-from-file-tool/m-p/435918#M6127 AkhilChopra 2017-08-04T20:49:31Z Re: Creating Link File for the Warp From File Tool https://community.esri.com/t5/arcgis-spatial-analyst-questions/creating-link-file-for-the-warp-from-file-tool/m-p/435919#M6128 <HTML><HEAD></HEAD><BODY><P>You need to <STRONG>add&nbsp;control points</STRONG> by using the Georeferencing toolbar. Once the control points are added (with their correct XY/Lat.Lon), &gt; <STRONG>View Link Table</STRONG> &gt; <STRONG>Save</STRONG> it s a text file.</P><P></P><P><IMG class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/365824_pastedImage_1.png" style="width: 620px; height: 309px;" /></P></BODY></HTML> Sat, 05 Aug 2017 04:53:16 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/creating-link-file-for-the-warp-from-file-tool/m-p/435919#M6128 JayantaPoddar 2017-08-05T04:53:16Z Re: Creating Link File for the Warp From File Tool https://community.esri.com/t5/arcgis-spatial-analyst-questions/creating-link-file-for-the-warp-from-file-tool/m-p/435920#M6129 <HTML><HEAD></HEAD><BODY><P>Thank you Jayanta! Much appreciated.&nbsp;</P></BODY></HTML> Mon, 07 Aug 2017 16:45:47 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/creating-link-file-for-the-warp-from-file-tool/m-p/435920#M6129 AkhilChopra 2017-08-07T16:45:47Z