$ identify housing.tif
housing.tif TIFF 900x1300+0+0 PseudoClass 256c 8-bit 2.2m 0.090u 0:01

$ convert housing.tif housing.gif
$ identify housing.gif 
housing.gif GIF 900x1300+0+0 PseudoClass 256c 8-bit 486.9k 0.140u 0:01