

jpn(jpn)                                     R Documentation

_P_l_o_t _J_a_p_a_n_'_s _C_o_a_s_t _L_i_n_e _a_n_d _P_r_e_f_e_c_t_u_r_e_s

_U_s_a_g_e_:

     jpn(region, xlim = c(128, 147), ylim = c(29.6, 47), pref = T,
         coast = T, add = F, okinawa = T, ar = 4/5, eps = 0.25, ...)

_A_r_g_u_m_e_n_t_s_:

  region: region which should be drawn.  A list containing
          components named `x' and `y' or a list of such
          objects.  If missing, `xlim' and `ylim' are used.

    xlim: optional limits for the x-axis (longitude).  The
          longitude for Okinawa is different from the real
          one.  See argument `okinawa'.

    ylim: optional limits for the y-axis (latitude).  The
          latitude for Okinawa is different from the real
          one.  See argument `okinawa'.

    pref: logical flag to control whether prefecture bound-
          aries are plotted or not.

   coast: logical flag to control whether coast-line is
          plotted or not.

     add: logical flag. If TRUE, plot is superimposed on
          existing plot.  Otherwise, a new plot is gener-
          ated.

 okinawa: logical flag.  Okinawa is drawn in the box placed
          on the Japan sea.  To put points or draw texts
          around Okinawa, shift longitude by
          +3.7767(degrees) and latitude by
          +13.05505(degrees).

      ar: aspect ratio of `longitude' to `latitude'.

     eps: If `region' is given, it is enlarged four ways by
          this amout(degrees).

     ...: optional arguments which will be passed through
          `lines'.

          Graphical parameters (see `par()') may also be
          supplied as arguments to this function.

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

     ## Region which includes Aomori and Osaka
     jpn(list(jcity$aomori, jcity$osaka), eps = 0.7)
     ## Around Fukuoka
     jpn(jcity$fukuoka, eps = 1)
     ## Shikoku Island
     jpn(xlim = c(132, 135), ylim = c(32.5, 34.5))

