source: josm/trunk/src/org/openstreetmap/josm/data/projection/Projections.java@ 9230

Last change on this file since 9230 was 9135, checked in by Don-vip, 10 years ago

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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.data.projection;
3
4import java.io.BufferedReader;
5import java.io.IOException;
6import java.io.InputStream;
7import java.io.InputStreamReader;
8import java.nio.charset.StandardCharsets;
9import java.util.ArrayList;
10import java.util.Collection;
11import java.util.Collections;
12import java.util.HashMap;
13import java.util.HashSet;
14import java.util.LinkedHashMap;
15import java.util.List;
16import java.util.Locale;
17import java.util.Map;
18import java.util.Set;
19import java.util.regex.Matcher;
20import java.util.regex.Pattern;
21
22import org.openstreetmap.josm.Main;
23import org.openstreetmap.josm.data.coor.EastNorth;
24import org.openstreetmap.josm.data.coor.LatLon;
25import org.openstreetmap.josm.data.projection.datum.Datum;
26import org.openstreetmap.josm.data.projection.datum.GRS80Datum;
27import org.openstreetmap.josm.data.projection.datum.NTV2GridShiftFileWrapper;
28import org.openstreetmap.josm.data.projection.datum.SevenParameterDatum;
29import org.openstreetmap.josm.data.projection.datum.ThreeParameterDatum;
30import org.openstreetmap.josm.data.projection.datum.WGS84Datum;
31import org.openstreetmap.josm.data.projection.proj.ClassProjFactory;
32import org.openstreetmap.josm.data.projection.proj.DoubleStereographic;
33import org.openstreetmap.josm.data.projection.proj.LambertConformalConic;
34import org.openstreetmap.josm.data.projection.proj.LonLat;
35import org.openstreetmap.josm.data.projection.proj.Mercator;
36import org.openstreetmap.josm.data.projection.proj.Proj;
37import org.openstreetmap.josm.data.projection.proj.ProjFactory;
38import org.openstreetmap.josm.data.projection.proj.SwissObliqueMercator;
39import org.openstreetmap.josm.data.projection.proj.TransverseMercator;
40import org.openstreetmap.josm.gui.preferences.projection.ProjectionChoice;
41import org.openstreetmap.josm.gui.preferences.projection.ProjectionPreference;
42import org.openstreetmap.josm.io.CachedFile;
43import org.openstreetmap.josm.tools.Utils;
44
45/**
46 * Class to handle projections
47 *
48 */
49public final class Projections {
50
51 /**
52 * Class to hold information about one projection.
53 */
54 public static class ProjectionDefinition {
55 public String code;
56 public String name;
57 public String definition;
58
59 public ProjectionDefinition(String code, String name, String definition) {
60 this.code = code;
61 this.name = name;
62 this.definition = definition;
63 }
64 }
65
66 private static final Set<String> allCodes = new HashSet<>();
67 private static final Map<String, ProjectionChoice> allProjectionChoicesByCode = new HashMap<>();
68 private static final Map<String, Projection> projectionsByCode_cache = new HashMap<>();
69
70 /*********************************
71 * Registry for custom projection
72 *
73 * should be compatible to PROJ.4
74 */
75 static final Map<String, ProjFactory> projs = new HashMap<>();
76 static final Map<String, Ellipsoid> ellipsoids = new HashMap<>();
77 static final Map<String, Datum> datums = new HashMap<>();
78 static final Map<String, NTV2GridShiftFileWrapper> nadgrids = new HashMap<>();
79 static final Map<String, ProjectionDefinition> inits;
80
81 static {
82 registerBaseProjection("lonlat", LonLat.class, "core");
83 registerBaseProjection("josm:smerc", Mercator.class, "core");
84 registerBaseProjection("lcc", LambertConformalConic.class, "core");
85 registerBaseProjection("somerc", SwissObliqueMercator.class, "core");
86 registerBaseProjection("tmerc", TransverseMercator.class, "core");
87 registerBaseProjection("sterea", DoubleStereographic.class, "core");
88
89 ellipsoids.put("airy", Ellipsoid.Airy);
90 ellipsoids.put("mod_airy", Ellipsoid.AiryMod);
91 ellipsoids.put("aust_SA", Ellipsoid.AustSA);
92 ellipsoids.put("bessel", Ellipsoid.Bessel1841);
93 ellipsoids.put("bess_nam", Ellipsoid.BesselNamibia);
94 ellipsoids.put("clrk66", Ellipsoid.Clarke1866);
95 ellipsoids.put("clrk80", Ellipsoid.Clarke1880);
96 ellipsoids.put("clarkeIGN", Ellipsoid.ClarkeIGN);
97 ellipsoids.put("evrstSS", Ellipsoid.EverestSabahSarawak);
98 ellipsoids.put("intl", Ellipsoid.Hayford);
99 ellipsoids.put("helmert", Ellipsoid.Helmert);
100 ellipsoids.put("krass", Ellipsoid.Krassowsky);
101 ellipsoids.put("GRS67", Ellipsoid.GRS67);
102 ellipsoids.put("GRS80", Ellipsoid.GRS80);
103 ellipsoids.put("WGS66", Ellipsoid.WGS66);
104 ellipsoids.put("WGS72", Ellipsoid.WGS72);
105 ellipsoids.put("WGS84", Ellipsoid.WGS84);
106
107 datums.put("WGS84", WGS84Datum.INSTANCE);
108 datums.put("GRS80", GRS80Datum.INSTANCE);
109 datums.put("NAD83", GRS80Datum.INSTANCE);
110 datums.put("carthage", new ThreeParameterDatum(
111 "Carthage 1934 Tunisia", "carthage",
112 Ellipsoid.Clarke1880, -263.0, 6.0, 431.0));
113 datums.put("GGRS87", new ThreeParameterDatum(
114 "Greek Geodetic Reference System 1987", "GGRS87",
115 Ellipsoid.GRS80, -199.87, 74.79, 246.62));
116 datums.put("hermannskogel", new ThreeParameterDatum(
117 "Hermannskogel", "hermannskogel",
118 Ellipsoid.Bessel1841, 653.0, -212.0, 449.0));
119 datums.put("ire65", new SevenParameterDatum(
120 "Ireland 1965", "ire65",
121 Ellipsoid.AiryMod, 482.530, -130.596, 564.557, -1.042, -0.214, -0.631, 8.15));
122 datums.put("nzgd49", new SevenParameterDatum(
123 "New Zealand Geodetic Datum 1949", "nzgd49",
124 Ellipsoid.Hayford, 59.47, -5.04, 187.44, 0.47, -0.1, 1.024, -4.5993));
125 datums.put("OSGB36", new SevenParameterDatum(
126 "Airy 1830", "OSGB36",
127 Ellipsoid.Airy, 446.448, -125.157, 542.060, 0.1502, 0.2470, 0.8421, -20.4894));
128 datums.put("potsdam", new SevenParameterDatum(
129 "Potsdam Rauenberg 1950 DHDN", "potsdam",
130 Ellipsoid.Bessel1841, 598.1, 73.7, 418.2, 0.202, 0.045, -2.455, 6.7));
131
132 nadgrids.put("BETA2007.gsb", NTV2GridShiftFileWrapper.BETA2007);
133 nadgrids.put("ntf_r93_b.gsb", NTV2GridShiftFileWrapper.ntf_rgf93);
134
135 List<ProjectionDefinition> pds;
136 try {
137 pds = loadProjectionDefinitions("resource://data/projection/custom-epsg");
138 } catch (IOException ex) {
139 throw new RuntimeException(ex);
140 }
141 inits = new LinkedHashMap<>();
142 for (ProjectionDefinition pd : pds) {
143 inits.put(pd.code, pd);
144 }
145
146 for (ProjectionChoice pc : ProjectionPreference.getProjectionChoices()) {
147 for (String code : pc.allCodes()) {
148 allProjectionChoicesByCode.put(code, pc);
149 }
150 }
151 allCodes.addAll(inits.keySet());
152 allCodes.addAll(allProjectionChoicesByCode.keySet());
153 }
154
155 private Projections() {
156 // Hide default constructor for utils classes
157 }
158
159 public static EastNorth project(LatLon ll) {
160 if (ll == null) return null;
161 return Main.getProjection().latlon2eastNorth(ll);
162 }
163
164 public static LatLon inverseProject(EastNorth en) {
165 if (en == null) return null;
166 return Main.getProjection().eastNorth2latlon(en);
167 }
168
169 /**
170 * Plugins can register additional base projections.
171 *
172 * @param id The "official" PROJ.4 id. In case the projection is not supported
173 * by PROJ.4, use some prefix, e.g. josm:myproj or gdal:otherproj.
174 * @param fac The base projection factory.
175 * @param origin Multiple plugins may implement the same base projection.
176 * Provide plugin name or similar string, so it be differentiated.
177 */
178 public static void registerBaseProjection(String id, ProjFactory fac, String origin) {
179 projs.put(id, fac);
180 }
181
182 public static void registerBaseProjection(String id, Class<? extends Proj> projClass, String origin) {
183 registerBaseProjection(id, new ClassProjFactory(projClass), origin);
184 }
185
186 public static Proj getBaseProjection(String id) {
187 ProjFactory fac = projs.get(id);
188 if (fac == null) return null;
189 return fac.createInstance();
190 }
191
192 public static Ellipsoid getEllipsoid(String id) {
193 return ellipsoids.get(id);
194 }
195
196 public static Datum getDatum(String id) {
197 return datums.get(id);
198 }
199
200 public static NTV2GridShiftFileWrapper getNTV2Grid(String id) {
201 return nadgrids.get(id);
202 }
203
204 /**
205 * Get the projection definition string for the given id.
206 * @param id the id
207 * @return the string that can be processed by #{link CustomProjection}.
208 * Null, if the id isn't supported.
209 */
210 public static String getInit(String id) {
211 ProjectionDefinition pd = inits.get(id.toUpperCase(Locale.ENGLISH));
212 if (pd == null) return null;
213 return pd.definition;
214 }
215
216 /**
217 * Load projection definitions from file.
218 *
219 * @param path the path
220 * @return projection definitions
221 * @throws IOException in case of I/O error
222 */
223 public static List<ProjectionDefinition> loadProjectionDefinitions(String path) throws IOException {
224 try (
225 InputStream in = new CachedFile(path).getInputStream();
226 BufferedReader r = new BufferedReader(new InputStreamReader(in, StandardCharsets.UTF_8));
227 ) {
228 return loadProjectionDefinitions(r);
229 }
230 }
231
232 /**
233 * Load projection definitions from file.
234 *
235 * @param r the reader
236 * @return projection definitions
237 * @throws IOException in case of I/O error
238 */
239 public static List<ProjectionDefinition> loadProjectionDefinitions(BufferedReader r) throws IOException {
240 List<ProjectionDefinition> result = new ArrayList<>();
241 Pattern epsgPattern = Pattern.compile("<(\\d+)>(.*)<>");
242 String line, lastline = "";
243 while ((line = r.readLine()) != null) {
244 line = line.trim();
245 if (!line.startsWith("#") && !line.isEmpty()) {
246 if (!lastline.startsWith("#")) throw new AssertionError("EPSG file seems corrupted");
247 String name = lastline.substring(1).trim();
248 Matcher m = epsgPattern.matcher(line);
249 if (m.matches()) {
250 String code = "EPSG:" + m.group(1);
251 String definition = m.group(2).trim();
252 result.add(new ProjectionDefinition(code, name, definition));
253 } else {
254 Main.warn("Failed to parse line from the EPSG projection definition: "+line);
255 }
256 }
257 lastline = line;
258 }
259 return result;
260 }
261
262 public static Projection getProjectionByCode(String code) {
263 Projection proj = projectionsByCode_cache.get(code);
264 if (proj != null) return proj;
265 ProjectionChoice pc = allProjectionChoicesByCode.get(code);
266 if (pc != null) {
267 Collection<String> pref = pc.getPreferencesFromCode(code);
268 pc.setPreferences(pref);
269 try {
270 proj = pc.getProjection();
271 } catch (Exception e) {
272 String cause = e.getMessage();
273 Main.warn("Unable to get projection "+code+" with "+pc + (cause != null ? ". "+cause : ""));
274 }
275 }
276 if (proj == null) {
277 ProjectionDefinition pd = inits.get(code);
278 if (pd == null) return null;
279 proj = new CustomProjection(pd.name, code, pd.definition, null);
280 }
281 projectionsByCode_cache.put(code, proj);
282 return proj;
283 }
284
285 public static Collection<String> getAllProjectionCodes() {
286 return Collections.unmodifiableCollection(allCodes);
287 }
288
289 private static String listKeys(Map<String, ?> map) {
290 List<String> keys = new ArrayList<>(map.keySet());
291 Collections.sort(keys);
292 return Utils.join(", ", keys);
293 }
294
295 /**
296 * Replies the list of projections as string (comma separated).
297 * @return the list of projections as string (comma separated)
298 * @since 8533
299 */
300 public static String listProjs() {
301 return listKeys(projs);
302 }
303
304 /**
305 * Replies the list of ellipsoids as string (comma separated).
306 * @return the list of ellipsoids as string (comma separated)
307 * @since 8533
308 */
309 public static String listEllipsoids() {
310 return listKeys(ellipsoids);
311 }
312
313 /**
314 * Replies the list of datums as string (comma separated).
315 * @return the list of datums as string (comma separated)
316 * @since 8533
317 */
318 public static String listDatums() {
319 return listKeys(datums);
320 }
321
322 /**
323 * Replies the list of nadgrids as string (comma separated).
324 * @return the list of nadgrids as string (comma separated)
325 * @since 8533
326 */
327 public static String listNadgrids() {
328 return listKeys(nadgrids);
329 }
330}
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