I am confused about grid sizes of maps. When i specify a grid size for an fft_map but then pull the numpy array out for direct manimpulation, it's always 2 larger in the last dimension. Why is it not the same size? Any help appreciated. George y# Now make initial (smoothed) map using random phases with Fobs f_obs_B = f_obs1.apply_debye_waller_factors( b_iso=biso_init) phases = f_obs_B.random_phases_compatible_with_phase_restrictions(deg=False) phases_data = phases.data() e_map_coeff = f_obs_B.phase_transfer(phase_source = phases_data) e_map = e_map_coeff.fft_map(crystal_gridding = crystal_gridding, symmetry_flags = maptbx.use_space_group_symmetry) print("cgridding", crystal_gridding.n_real()) # pick initial envelope e_map_array = e_map.real_map().as_numpy_array() print("e_map", e_map_array.shape) cgridding (90, 90, 80) e_map (90, 90, 82) George N. Phillips, Jr., Ph.D. Professor Emeritus University of Wisconsin-Madison 433 Babcock Dr. Madison, Wi 53706 Phone 713 348 6951 (Houston)