projInfo                package:rgdal                R Documentation

_L_i_s_t _P_R_O_J._4 _t_a_g _i_n_f_o_r_m_a_t_i_o_n

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

     The 'projInfo' function lists known values and descriptions for
     PROJ.4 tags for tag in 'c("proj", "ellps", "datum")';
     'getPROJ4VersionInfo' returns the version of the underlying PROJ.4
     release, 'getPROJ4libPath' returns the value of the PROJ_LIB
     environment variable, 'projNAD' detects the presence of NAD datum
     conversion tables (looking for conus).

_U_s_a_g_e:

     projInfo(type = "proj")
     getPROJ4VersionInfo()
     getPROJ4libPath()
     projNAD()

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

    type: One of these tags: 'c("proj", "ellps", "datum")'

_D_e_t_a_i_l_s:

     The output data frame lists the information given by the proj
     application with flags -lp, -le or -ld.

_V_a_l_u_e:

     A data frame with a name and description column, and two extra
     columns for the "ellps" and "datum" tags.

_N_o_t_e:

     Loading the rgdal package changes the 'PROJ_LIB' environmental
     variable to the PROJ.4 support files bundles with the package.

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

     Roger Bivand Roger.Bivand@nhh.no

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

     <URL: http://proj.maptools.org/>

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

     getPROJ4VersionInfo()
     projInfo()

