fix output dem

contrib/dem-blend/dem-blend.py

@@ -22,12 +22,10 @@ if not os.path.exists(args.input_dems):
     print("%s does not exist" % args.input_dems)
     exit(1)
 
-outdir = os.path.dirname(args.input_dems)
-output_dem = os.path.join(outdir, 'merged_blended_dem.tif')
+output_dem = os.path.join(args.input_dems, 'merged_blended_dem.tif')
 input_dem_path = os.path.join(args.input_dems, '*.tif')
 input_dems = glob.glob(input_dem_path)
 
 merge.euclidean_merge_dems(input_dems
                     ,output_dem=output_dem
-                    ,max_workers=multiprocessing.cpu_count()
                 )