How to merge rasters

[AmirJavaheri]

Hi,

I have a raster file for a watershed which a small area of this file has wrong data. I found the correct data for that area. But I have no idea how I can replace these new raster with new data in my previous raster. I really appreciate if anybody can help.

Thanks!

[MarkBoucher]

Use the Raster Mosaic tool with the option that the values of the LAST raster are the ones to keep. Then enter the raster with the correct values last. Works on raster datasets only.