Index: trunk/scripts/BuildProjectionDefinitions.java =================================================================== --- trunk/scripts/BuildProjectionDefinitions.java (revision 9133) +++ trunk/scripts/BuildProjectionDefinitions.java (revision 9133) @@ -0,0 +1,163 @@ +// License: GPL. For details, see LICENSE file. + +import java.io.BufferedWriter; +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.OutputStreamWriter; +import java.nio.charset.StandardCharsets; +import java.util.HashMap; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; + +import org.openstreetmap.josm.data.projection.CustomProjection; +import org.openstreetmap.josm.data.projection.ProjectionConfigurationException; +import org.openstreetmap.josm.data.projection.Projections; +import org.openstreetmap.josm.data.projection.Projections.ProjectionDefinition; +import org.openstreetmap.josm.data.projection.proj.Proj; + +/** + * Generates the list of projections by combining two sources: The list from the + * proj.4 project and a list maintained by the JOSM team. + */ +public class BuildProjectionDefinitions { + + private static final String JOSM_EPSG_FILE = "data_nodist/projection/josm-epsg"; + private static final String PROJ4_EPSG_FILE = "data_nodist/projection/epsg"; + private static final String OUTPUT_EPSG_FILE = "data/projection/custom-epsg"; + + private static final Map epsgProj4 = new LinkedHashMap<>(); + private static final Map epsgJosm = new LinkedHashMap<>(); + + private static final boolean printStats = false; + + // statistics: + private static int noInJosm = 0; + private static int noDeprecated = 0; + private static int noGeocent = 0; + private static int noBaseProjection = 0; + private static final Map baseProjectionMap = new HashMap<>(); + private static int noDatumgrid = 0; + private static int noJosm = 0; + private static int noProj4 = 0; + + public static void main(String[] args) throws IOException, InterruptedException { + buildList(); + } + + static void buildList() throws IOException { + List pdJosm = Projections.loadProjectionDefinitions(JOSM_EPSG_FILE); + for (ProjectionDefinition pd : pdJosm) { + epsgJosm.put(pd.code, pd); + } + List pdProj4 = Projections.loadProjectionDefinitions(PROJ4_EPSG_FILE); + for (ProjectionDefinition pd : pdProj4) { + epsgProj4.put(pd.code, pd); + } + + try (BufferedWriter out = new BufferedWriter(new OutputStreamWriter( + new FileOutputStream(OUTPUT_EPSG_FILE), StandardCharsets.UTF_8))) { + out.write("## This file is autogenerated, do not edit!\n"); + out.write("## Run ant task \"epsg\" to rebuild.\n"); + out.write(String.format("## Source files are %s (can be changed) and %s (copied from the proj.4 project).\n", JOSM_EPSG_FILE, PROJ4_EPSG_FILE)); + out.write("##\n"); + out.write("## Entries checked and maintained by the JOSM team:\n"); + for (ProjectionDefinition pd : epsgJosm.values()) { + write(out, pd); + noJosm++; + } + out.write("## Other supported projections (source: proj.4):\n"); + for (ProjectionDefinition pd : epsgProj4.values()) { + if (doInclude(pd, true)) { + write(out, pd); + noProj4++; + } + } + } + + if (printStats) { + System.out.println(String.format("loaded %d entries from %s", epsgJosm.size(), JOSM_EPSG_FILE)); + System.out.println(String.format("loaded %d entries from %s", epsgProj4.size(), PROJ4_EPSG_FILE)); + System.out.println(); + System.out.println("some entries from proj.4 have not been included:"); + System.out.println(String.format(" * already in the maintained JOSM list: %d entries", noInJosm)); + System.out.println(String.format(" * deprecated: %d entries", noDeprecated)); + System.out.println(String.format(" * using +proj=geocent, which is 3D (X,Y,Z) and not useful in JOSM: %d entries", noGeocent)); + System.out.println(String.format(" * unsupported base projection: %d entries", noBaseProjection)); + System.out.println(" in particular: " + baseProjectionMap); + System.out.println(String.format(" * requires data file for datum conversion: %d entries", noDatumgrid)); + System.out.println(); + System.out.println(String.format("written %d entries from %s", noJosm, JOSM_EPSG_FILE)); + System.out.println(String.format("written %d entries from %s", noProj4, PROJ4_EPSG_FILE)); + } + + } + + static void write(BufferedWriter out, ProjectionDefinition pd) throws IOException { + out.write("# " + pd.name + "\n"); + out.write("<"+pd.code.substring("EPSG:".length())+"> "+pd.definition+" <>\n"); + } + + static boolean doInclude(ProjectionDefinition pd, boolean noIncludeJosm) { + + boolean result = true; + + if (noIncludeJosm) { + // we already have this projection + if (epsgJosm.containsKey(pd.code)) { + result = false; + noInJosm++; + } + } + + // exclude deprecated projections + // EPSG:4296 is also deprecated, but this is not mentioned in the name + if (pd.name.contains("deprecated") || pd.code.equals("EPSG:4296")) { + result = false; + noDeprecated++; + } + + Map parameters; + try { + parameters = CustomProjection.parseParameterList(pd.definition, true); + } catch (ProjectionConfigurationException ex) { + throw new RuntimeException(pd.code+":"+ex); + } + String proj = parameters.get(CustomProjection.Param.proj.key); + + // +proj=geocent is 3D (X,Y,Z) "projection" - this is not useful in + // JOSM as we only deal with 2D maps + if ("geocent".equals(proj)) { + result = false; + noGeocent++; + } + + // exclude entries where we don't support the base projection + Proj bp = Projections.getBaseProjection(proj); + if (!"utm".equals(proj) && bp == null) { + result = false; + noBaseProjection++; + if (!"geocent".equals(proj)) { + if (!baseProjectionMap.containsKey(proj)) { + baseProjectionMap.put(proj, 0); + } + baseProjectionMap.put(proj, baseProjectionMap.get(proj)+1); + } + } + + // no support for NAD27 datum, as it requires a conversion database + String datum = parameters.get(CustomProjection.Param.datum.key); + if ("NAD27".equals(datum)) { + result = false; + noDatumgrid++; + } + + // requires datum conversion database + if (parameters.containsKey("geoidgrids")) { + result = false; + noDatumgrid++; + } + + return result; + } +}