svn-gvsig-desktop / tags / v1_1_Build_1013 / libraries / libJCRS / src / org / gvsig / crs / ogr / Epsg2wkt.java @ 13521
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2006 Instituto de Desarrollo Regional and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* Instituto de Desarrollo Regional (Universidad de Castilla La-Mancha)
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* Campus Universitario s/n
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* 02071 Alabacete
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* Spain
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*
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* +34 967 599 200
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*/
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package org.gvsig.crs.ogr; |
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import java.util.ArrayList; |
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/**
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* Clase que genera de un CRS escogido del repositorio de EPSG su cadena
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* en wkt correctamente para la creaci?n del CRS conforme a los par?metros
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* aceptados en la librer?a proj4 (en cuanto a formato)
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*
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* @author Jos? Luis G?mez Mart?nez (jolugomar@gmail.com)
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*/
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public class Epsg2wkt { |
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String cadWKT= ""; |
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/*
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* definimos 2 arrays para el cambio de proyecciones y de parametros de la epsg a
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* proyecciones y par?metros entendibles por gdal, de manera que el elemento i
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* de cada uno de ellos coincide con el cambio correcto de epsg a gdal.
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*/
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String[] paramsEPSG = {"Angle from Rectified to Skew Grid", "Azimuth of initial line", |
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"Easting at false origin", "Easting at projection centre", "False easting", |
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"False northing", "Latitude of false origin", "Latitude of 1st standard parallel", |
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"Latitude of natural origin", "Latitude of origin", "Latitude of projection centre", |
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"Latitude of 2nd standard parallel", "Longitude of false origin", |
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"Longitude of natural origin", "Longitude of origin", "Longitude of projection centre", |
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"Northing at false origin", "Northing at projection centre", |
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"Scale factor at natural origin", "Scale factor on initial line",}; |
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String[] paramsWkt = {"rectified_grid_angle", "azimuth", "false_easting", "false_easting", |
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"false_easting", "false_northing", "latitude_of_origin", "standard_parallel_1", |
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"latitude_of_origin", "latitude_of_origin", "latitude_of_center", "standard_parallel_2", |
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"central_meridian", "central_meridian", "central_meridian", "longitude_of_center", |
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"false_northing", "false_northing", "scale_factor", "scale_factor",}; |
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String[] projectionsEPSG = {"Lambert Conic Conformal (1SP)","Lambert Conic Conformal (2SP)", |
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"Lambert Conic Conformal (2SP) Belgium", "American Polyconic", "Krovak Oblique Conic Conformal", |
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"Albers Equal Area", "Mercator (1SP)", "Mercator (2SP)", "Polar Stereographic (variant A)", "Polar Stereographic (variant B)", "Polar Stereographic (variant C)"}; |
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String[] projectionsWkt = {"Lambert Conformal Conic 1SP","Lambert Conformal Conic 2SP", |
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"Lambert Conformal Conic 2SP Belgium", "Polyconic", "Krovak", "Albers Conic Equal Area", |
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"Mercator 1SP", "Mercator 2SP", "Polar Stereographic", "Polar Stereographic", "Polar Stereographic"}; |
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String[] authority ; |
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/**
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* Constructor para un CRS horizontal y proyectado
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*/
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public Epsg2wkt(GetCRSepsg epsg, String kind) { |
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if (kind.equals("proj")){ |
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String[] spheroid = epsg.getSPHEROID(); |
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String[] primem = epsg.getPRIMEM(); |
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String[] param_name = epsg.getParam_name(); |
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String[] param_value = epsg.getParam_value(); |
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authority = epsg.getAUTHORITY(); |
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cadWKT = "PROJCS[\""+ epsg.getPROJCS()+"\", GEOGCS[\"" + epsg.getGEOGCS() + "\", DATUM[\""+ epsg.getDATUM() + |
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"\", SPHEROID[\""+ spheroid[0] + "\", "+ spheroid[1] + ", "+ spheroid[2] +"]], " + |
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"PRIMEM[\""+ primem[0] + "\", "+ primem[1] +"], UNIT[\""+ epsg.getUNIT_A() + "\", " + (Math.PI/180) + |
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"]], PROJECTION[\""+ getNameProjectionWkt(epsg.getPROJECTION()) + "\"], "; |
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/*
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* falta la parte de los par?metros... metodo para nombres...
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*/
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for (int i= 0; i< param_name.length;i++){ |
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param_name[i] = getParametersWkt(param_name[i]); |
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cadWKT += "PARAMETER[\""+param_name[i]+"\", " + param_value[i]+ "], "; |
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} |
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cadWKT += "UNIT[\""+ epsg.getUNIT_B() + "\", "+epsg.getUnit_BValue()+"], "; |
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cadWKT += "AUTHORITY[\""+ authority[0] + "\", " + authority[1] + "]]"; |
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} |
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else if (kind.equals("geog")) { |
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String[] spheroid = epsg.getSPHEROID(); |
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String[] primem = epsg.getPRIMEM(); |
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String[] authority = epsg.getAUTHORITY(); |
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cadWKT = "GEOGCS[\"" + epsg.getGEOGCS() + "\", DATUM[\""+ epsg.getDATUM() + |
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"\", SPHEROID[\""+ spheroid[0] + "\", "+ spheroid[1] + ", "+ spheroid[2] +"]], " + |
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"PRIMEM[\""+ primem[0] + "\", "+ primem[1] +"], UNIT[\""+ epsg.getUNIT_A() + "\", " + (Math.PI/180) + |
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"], ";
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cadWKT += "AUTHORITY[\""+ authority[0] + "\", " + authority[1] + "]]"; |
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} |
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else if (kind.equals("geoc")){ |
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String[] spheroid = epsg.getSPHEROID(); |
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String[] primem = epsg.getPRIMEM(); |
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cadWKT = "GEOCCS[\"" + epsg.getGEOGCS() + "\", DATUM[\""+ epsg.getDATUM() + |
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"\", SPHEROID[\""+ spheroid[0] + "\", "+ spheroid[1] + ", "+ spheroid[2] +"]], " + |
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"PRIMEM[\""+ primem[0] + "\", "+ primem[1] +"], UNIT[\""+ epsg.getUNIT_A() + "\", " + (Math.PI/180) + |
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"]]";
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/*
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* parte necesaria cuando tratemos CRS geocentricos
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*/
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} |
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else if (kind.equals("comp")){ |
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/*
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* parte necesaria cuando tratemos CRS compuestos (Hablar con David)
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*/
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} |
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} |
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/*
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* Contructor para un CRS local (por ahora no se contempla)
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*/
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public Epsg2wkt(String localcs, String local_datum, String unit, ArrayList axis) { |
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cadWKT = "LOCAL_CS[" + localcs + ", LOCAL_DATUM["+ local_datum + |
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"], UNIT["+ unit +"]"; |
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for (int i =0; i< axis.size(); i++){ |
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cadWKT += ", AXIS[" + axis.get(i) + "]"; |
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} |
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cadWKT += "]";
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} |
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public String getWKT(){ |
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return cadWKT;
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} |
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/**
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* Consigue la proyecci?n en el formato correcto para que sea legible
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* por la librer?a proj4. Acepta la proyecci?n del CRS seleccionado y
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* devuelve la misma proyecci?n escrita de manera correcta.
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* @param projection
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* @return
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*/
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private String getNameProjectionWkt(String projection) { |
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String proj = null; |
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/**
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* El motivo de este cambio es que si le pedimos la proyecci?n a estos dos
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* crs proyectados dentro de la epsg, el valor devuelto es la proyecci?n
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* "oblique mercator", mientras que tras consultarlo en distintas fuentes
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* todas coinciden en que la proyecci?n para estos dos c?digos de la epsg es la
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* "Hotine Oblique Mercator". Si se deja con la proyecci?n que viene de la epsg,
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* al pasar por gdal para formar la cadena proj4 falla, mientras que al cambiar
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* el nombre de dicha proyecci?n, la cadena proj4 resultante es correcta.
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*/
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// TODO controlar estos casos excepcionales
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if (authority[1].equals("2056") || authority[1].equals("21781")) |
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return "Hotine_Oblique_Mercator"; |
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/*
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* hacer el cambio de nombre de proyeccion correcta
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*/
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for (int i = 0; i< projectionsEPSG.length; i++){ |
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if (projectionsEPSG[i].equals(projection)){
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projection = projectionsWkt[i]; |
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} |
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} |
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proj = projection.replaceAll(" ", "_"); |
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return proj;
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} |
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/**
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* Acepta el par?metro actual, realiza el cambio necesario para que
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* sea legible por la proj4, y lo devuelve para insertarlo en la
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* cadena wkt
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*
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* @param param
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* @return
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*/
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private String getParametersWkt(String param){ |
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for (int j=0; j< paramsEPSG.length; j++){ |
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if (param.equals(paramsEPSG[j])){
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param = paramsWkt[j]; |
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} |
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} |
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return param.replaceAll(" ", "_"); |
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} |
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} |