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=system.file("proj/epsg", package="rgdal"))

_A_r_g_u_m_e_n_t_s:

    file: file name of the file matching EPSG codes and PROJ.4
          arguments

_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]

