Srings-class               package:sp               R Documentation

_C_l_a_s_s "_S_r_i_n_g_s"

_D_e_s_c_r_i_p_t_i_o_n:

     Collection of objects of class '"Sring"'

_O_b_j_e_c_t_s _f_r_o_m _t_h_e _C_l_a_s_s:

     Objects can be created by calls to the function 'Srings'

_S_l_o_t_s:

     '_S_r_i_n_g_s': Object of class '"list"'; list with objects of class
          Sring-class 

     '_p_l_o_t_O_r_d_e_r': Object of class '"integer"'; order in which the Sring
          objects should be plotted, currently by order of decreasing
          size 

     '_l_a_b_p_t': Object of class '"numeric"'; pair of x, y coordinates
          giving a label point, the label point of the largest ring
          component  

     '_I_D': Object of class '"character"'; unique identifier string  

     '_a_r_e_a': Object of class '"numeric"'; the total area of the Sring
          list including the areas of holes; these values are used to
          make sure that rings of a smaller area are plotted after
          rings of a larger area 

     '_b_b_o_x': Object of class '"matrix"'; see Spatial-class 

     '_p_r_o_j_4_s_t_r_i_n_g': Object of class '"CRS"'; see CRS-class 

_E_x_t_e_n_d_s:

     Class '"Spatial"', directly.

_M_e_t_h_o_d_s:

     No methods defined with class "Srings" in the signature.

_N_o_t_e:

     By default, single rings (where Srings is a list of length one)
     are not expected to be holes, but in multiple rings, hole
     definitions for member rings can be set. Sring objects belonging
     to an Srings object should either not overlap one-other, or should
     be fully included (as lakes or islands in lakes). They should not
     be self-intersecting. Checking of hole FALSE/TRUE status for
     Srings objects is included in the spgpc wrapper package for gpclib
     functions, function checkSringsHoles() (currently on sourceforge).

_A_u_t_h_o_r(_s):

     Roger Bivand

_R_e_f_e_r_e_n_c_e_s:

_S_e_e _A_l_s_o:

_E_x_a_m_p_l_e_s:

