I'm trying to work with the species distribution modeling software ModEco, which requires .grd files, but I've only been given .asc files. I was wondering if I could convert the .asc to .grd.
do they provide some details about the grd format? perhaps it is simply an ascii file with a different file extension
Esri ASCII raster format—Help | ArcGIS for Desktop
a quick look in a text editor wouldn't hurt