I have a AsterDem of resolution 30m for my study area. I want to know the number of columns and rows present in the DEM raster. How do I find it out using ArcGIS?
The Get Raster Properties tool in the Data Management toolbox is what you want. Input your AsterDEM raster and run the tool twice-- once to get COLUMNCOUNT and once for ROWCOUNT. The number of cells in each direction will be in your Results window.