make_EPSG               package:rgdal               R Documentation

_M_a_k_e _a _d_a_t_a _f_r_a_m_e _o_f _E_P_S_G _p_r_o_j_e_c_t_i_o_n _c_o_d_e_s

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

     Make a data frame of the now-defunct European Petroleum Survey
     Group (EPSG) geodetic parameter dataset as distributed with PROJ.4
     software and included in this package. Because finding the correct
     projection specification is not easy, lists still known as EPSG
     lists are maintained, and more generally retrieved from Access
     databases. The data collated here are as distributed with PROJ.4.

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

     make_EPSG(file)

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

    file: file name of the file matching EPSG codes and PROJ.4
          arguments, should usually be autodetected

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

     returns a data frame with columns: 

    code: integer column of EPSG code numbers

    note: character column of notes as included in the file

    prj4: character column of PROJ.4 arguments for the equivalent
          projection definitions

     ...

_N_o_t_e:

     See also Clifford J. Mugnier's Grids & Datums columns in
     Photogrammetric Engineering & Remote Sensing, <URL:
     http://www.asprs.org/resources/GRIDS/>

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

     Roger Bivand

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

     <URL: http://www.epsg.org/>

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

     EPSG <- make_EPSG()
     EPSG[grep("Oslo", EPSG$note), 1:2]
     EPSG[1925:1927, 3]
     EPSG[grep("Poland", EPSG$note), 1:2]
     EPSG[grep("Amersfoort", EPSG$note), 1:2]
     EPSG[grep("North Carolina", EPSG$note), 1:2]
     EPSG[2202, 3]

