pub unsafe extern "C" fn proj_create_conversion_vertical_perspective(
ctx: *mut PJ_CONTEXT,
topo_origin_lat: f64,
topo_origin_long: f64,
topo_origin_height: f64,
view_point_height: f64,
false_easting: f64,
false_northing: f64,
ang_unit_name: *const c_char,
ang_unit_conv_factor: f64,
linear_unit_name: *const c_char,
linear_unit_conv_factor: f64,
) -> *mut PJ