topic Re: Converting a raster DEM into contours in 3D Questions https://community.esri.com/t5/3d-questions/converting-a-raster-dem-into-contours/m-p/223019#M1360 <HTML><HEAD></HEAD><BODY><SPAN>.img is an ERDAS native format.</SPAN><BR /><BR /><SPAN>I don't think that ArcGIS will recognize that as an allowable Input for your tools.</SPAN><BR /><BR /><BR /><SPAN>Try converting the .img file to something else, like .TIFF or an ESRI grid file (no extension on export).</SPAN><BR /><BR /><SPAN>Quick way to change format:</SPAN><BR /><SPAN>In ArcMap, right click .img file in Table of Contents</SPAN><BR /><SPAN>go down to Data &gt; Export Data...</SPAN><BR /><SPAN>Near the bottom of the Export window you can specify the raster type (see image):</SPAN><BR /><SPAN> [ATTACH]4550[/ATTACH]</SPAN></BODY></HTML> Wed, 02 Feb 2011 17:50:04 GMT DonovanCameron 2011-02-02T17:50:04Z Converting a raster DEM into contours https://community.esri.com/t5/3d-questions/converting-a-raster-dem-into-contours/m-p/223018#M1359 <HTML><HEAD></HEAD><BODY><SPAN>Hi there, am having problems converting my DEM.img into contours. When i add the DEM layer into Arcview, its not made active in the spatial analyst for me to go ahead and convert it into contours.</SPAN><BR /><BR /><SPAN>Please help.</SPAN><BR /><BR /><SPAN>Uganda247</SPAN></BODY></HTML> Tue, 25 Jan 2011 17:48:39 GMT https://community.esri.com/t5/3d-questions/converting-a-raster-dem-into-contours/m-p/223018#M1359 BabiryeGeraldine_Paula 2011-01-25T17:48:39Z Re: Converting a raster DEM into contours https://community.esri.com/t5/3d-questions/converting-a-raster-dem-into-contours/m-p/223019#M1360 <HTML><HEAD></HEAD><BODY><SPAN>.img is an ERDAS native format.</SPAN><BR /><BR /><SPAN>I don't think that ArcGIS will recognize that as an allowable Input for your tools.</SPAN><BR /><BR /><BR /><SPAN>Try converting the .img file to something else, like .TIFF or an ESRI grid file (no extension on export).</SPAN><BR /><BR /><SPAN>Quick way to change format:</SPAN><BR /><SPAN>In ArcMap, right click .img file in Table of Contents</SPAN><BR /><SPAN>go down to Data &gt; Export Data...</SPAN><BR /><SPAN>Near the bottom of the Export window you can specify the raster type (see image):</SPAN><BR /><SPAN> [ATTACH]4550[/ATTACH]</SPAN></BODY></HTML> Wed, 02 Feb 2011 17:50:04 GMT https://community.esri.com/t5/3d-questions/converting-a-raster-dem-into-contours/m-p/223019#M1360 DonovanCameron 2011-02-02T17:50:04Z