Thank you for your response for my question. I have another question of loading "rmap_1.1.0.zip" to R 2.1.1 on Windows XP. R2.1.1 said "'Rmap' is not valid package. It was probably installed in < 2.0.0. " on loading this rmap. Will you not support Rmap for R 2.1.x since (sp)maptools has replaced Rmap? Regards.