I have a bunch of maps that are output from a land use model in .asc format, but none have a projection file associated. The person who originally ran the LU model is long gone, so I don't have access to the files that were the original input to the model. I've gone through http://spatialreference.org and ad-hoc tried to fit my data to all the projections that looked remotely worth trying, as suggested here and in links within.
Details: Using ArcInfo 10.0. Data is for China. Gauss-Kruger projections came close to looking correct (after on-the-fly projecting on top of my known reference data), but were still several hundred km off in places and somewhat distorted. I think my only recourse is to manually project these projectionless shapefiles - which really sounds like a non-solution to me. Anyone have thoughts on a better fix?
Here's the extent info Top: 5924000 Left: -2638000 Right: 2210000 Bottom: 1870000