aRT-classes               package:aRT               R Documentation

'_a_R_T' _c_l_a_s_s_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     There are some classes to encapsulate TerraLib inside R, and they
     are briefly described here.

     _a_R_T: Can to store a virtual DBMA connection and manipulates aRTdb
          objects. It can also perform some database administration
          tasks.

     _a_R_T_d_b: Stores a real connection to a DBMA database, and can
          open/create aRTlayers.

     _a_R_T_l_a_y_e_r: Represents an information layer inside a database. Each
          layer manipulates only geometry, and is capable to do spatial
          queries as metrics and relations. Although it cannot
          manipulate attributes, it can open/create aRTtables,
          aRTthemes and aRTqueriers.

     _a_R_T_t_a_b_l_e: Stores a database table, and data is manipulated using
          data.frames. Each table has one specific type, and it can be
          static, temporal, external or media. When getting data from
          the table, you get all the data, without restrictions, unless
          you use an aRTtheme.

     _a_R_T_t_h_e_m_e: Created from an aRTlayer, it can join tables and choose
          attribute restrictions. It can also create aRTquerier
          objects.

     _a_R_T_q_u_e_r_i_e_r: Encapsulates a query. It can be temporal, if it was
          created from a temporal theme, and a slicing was defined. It
          retrieves data one by one, slide by slide (if temporal),
          instead of all atributes/geometry once.

     _a_R_T_v_i_s_u_a_l: Defines a colors and style configuration to be used in
          aRTthemes.

_A_u_t_h_o_r(_s):

     Marcos Aurelio Carrero and Pedro Ribeiro de Andrade Neto

_R_e_f_e_r_e_n_c_e_s:

     <URL: http://www.est.ufpr.br/aRT>

_S_e_e _A_l_s_o:

     'CLASSNAME-class' for links to CLASSNAME

