Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Journal of Remote sensing and Digital Image Processing Vol. 9 No. 2 Desember 2012 : Perbandingan Teknik Interpolasi DEM SRTM 30 M Dengan Metode Inverse Distance Weighted, Natural Neighbor da Spline (Comparison of Interpolation Technical DEM SRTM 30 M with Inverse Distance Weighted, Natural Neighbor and Spline)