topic Changing a Raster's Extent in Data Management Questions https://community.esri.com/t5/data-management-questions/changing-a-raster-s-extent/m-p/735763#M41612 <HTML><HEAD></HEAD><BODY><SPAN>A friend of mine sent me some raster files. The raster files are good in every way, except for the extent. The extent of the raster file is completely off. I know what the new extents need to be, but I have no idea how to change them. If you know how to change a raster's extent, please post it.</SPAN></BODY></HTML> Mon, 27 Dec 2010 17:56:47 GMT JordanKramer 2010-12-27T17:56:47Z Changing a Raster's Extent https://community.esri.com/t5/data-management-questions/changing-a-raster-s-extent/m-p/735763#M41612 <HTML><HEAD></HEAD><BODY><SPAN>A friend of mine sent me some raster files. The raster files are good in every way, except for the extent. The extent of the raster file is completely off. I know what the new extents need to be, but I have no idea how to change them. If you know how to change a raster's extent, please post it.</SPAN></BODY></HTML> Mon, 27 Dec 2010 17:56:47 GMT https://community.esri.com/t5/data-management-questions/changing-a-raster-s-extent/m-p/735763#M41612 JordanKramer 2010-12-27T17:56:47Z Re: Changing a Raster's Extent https://community.esri.com/t5/data-management-questions/changing-a-raster-s-extent/m-p/735764#M41613 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE class="jive-quote">A friend of mine sent me some raster files. The raster files are good in every way, except for the extent. The extent of the raster file is completely off. I know what the new extents need to be, but I have no idea how to change them. If you know how to change a raster's extent, please post it.</BLOCKQUOTE><BR /><SPAN> </SPAN><BR /><SPAN>Hi, </SPAN><BR /><BR /><SPAN>There are two issues that may be occurring. </SPAN><BR /><BR /><SPAN>1) the rasters are not georeferenced. The extents reflect the number of cells in the raster like 0.5,0.5 to 999.5,999.5. </SPAN><BR /><BR /><SPAN>If this is the case, see </SPAN><BR /><BR /><A href="http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Fundamentals_for_georeferencing_a_raster_dataset/009t000000mn000000/"><SPAN style="text-decoration:underline;">Fundamentals for georeferencing a raster dataset</SPAN></A><BR /><BR /><SPAN>2) The raster has no coordinate system information, so ArcMap isn't able to project it on-the-fly (in memory) to match your other data. In this case, you need to define the coordinate system. Once that's done, you can use the Project Raster tool to create a copy in a different coordinate system.</SPAN><BR /><BR /><A href="http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Defining_or_modifying_a_raster_s_coordinate_system/009t0000002m000000/"><SPAN style="text-decoration:underline;">Defining or modifying a rasters coordinate system</SPAN></A><BR /><BR /><SPAN>Melita</SPAN></BODY></HTML> Tue, 28 Dec 2010 23:25:27 GMT https://community.esri.com/t5/data-management-questions/changing-a-raster-s-extent/m-p/735764#M41613 MelitaKennedy 2010-12-28T23:25:27Z