topic how to merge DEM rasters in Data Management Questions https://community.esri.com/t5/data-management-questions/how-to-merge-dem-rasters/m-p/681307#M38627 <HTML><HEAD></HEAD><BODY><SPAN>I have many (46) DEM tiles that I want to merge so that I can create one large TIN -it's a large county in NW Alberta.&nbsp; I have tried creating Raster Dataset (intending then to load the rasters into it), I have tried mosaic to New Raster.&nbsp; It will mosaic to new raster but the output raster has a constant value, each pixel is "255".&nbsp; WHAT am i doing wrong and how do I get this to work before my trial times out in 9 days?&nbsp; I thought that maybe I had to symbolize each raster the same way but that isn't it. I can't find the right process and there is no how-to other than the python script listed in the Help.</SPAN></BODY></HTML> Thu, 14 Feb 2013 18:04:19 GMT AudraLindsey 2013-02-14T18:04:19Z how to merge DEM rasters https://community.esri.com/t5/data-management-questions/how-to-merge-dem-rasters/m-p/681307#M38627 <HTML><HEAD></HEAD><BODY><SPAN>I have many (46) DEM tiles that I want to merge so that I can create one large TIN -it's a large county in NW Alberta.&nbsp; I have tried creating Raster Dataset (intending then to load the rasters into it), I have tried mosaic to New Raster.&nbsp; It will mosaic to new raster but the output raster has a constant value, each pixel is "255".&nbsp; WHAT am i doing wrong and how do I get this to work before my trial times out in 9 days?&nbsp; I thought that maybe I had to symbolize each raster the same way but that isn't it. I can't find the right process and there is no how-to other than the python script listed in the Help.</SPAN></BODY></HTML> Thu, 14 Feb 2013 18:04:19 GMT https://community.esri.com/t5/data-management-questions/how-to-merge-dem-rasters/m-p/681307#M38627 AudraLindsey 2013-02-14T18:04:19Z