source: josm/trunk/src/org/openstreetmap/josm/data/projection/CustomProjection.java@ 13632

Last change on this file since 13632 was 13628, checked in by Don-vip, 6 years ago

see #16129 - handle projection definitions with both +datum and +towgs84
  • Property svn:eol-style set to native
File size: 35.1 KB
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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.data.projection;
3
4import static org.openstreetmap.josm.tools.I18n.tr;
5
6import java.util.ArrayList;
7import java.util.Arrays;
8import java.util.EnumMap;
9import java.util.HashMap;
10import java.util.List;
11import java.util.Map;
12import java.util.Optional;
13import java.util.concurrent.ConcurrentHashMap;
14import java.util.regex.Matcher;
15import java.util.regex.Pattern;
16
17import org.openstreetmap.josm.data.Bounds;
18import org.openstreetmap.josm.data.ProjectionBounds;
19import org.openstreetmap.josm.data.coor.EastNorth;
20import org.openstreetmap.josm.data.coor.LatLon;
21import org.openstreetmap.josm.data.coor.conversion.LatLonParser;
22import org.openstreetmap.josm.data.projection.datum.CentricDatum;
23import org.openstreetmap.josm.data.projection.datum.Datum;
24import org.openstreetmap.josm.data.projection.datum.NTV2Datum;
25import org.openstreetmap.josm.data.projection.datum.NullDatum;
26import org.openstreetmap.josm.data.projection.datum.SevenParameterDatum;
27import org.openstreetmap.josm.data.projection.datum.ThreeParameterDatum;
28import org.openstreetmap.josm.data.projection.datum.WGS84Datum;
29import org.openstreetmap.josm.data.projection.proj.ICentralMeridianProvider;
30import org.openstreetmap.josm.data.projection.proj.IScaleFactorProvider;
31import org.openstreetmap.josm.data.projection.proj.Mercator;
32import org.openstreetmap.josm.data.projection.proj.Proj;
33import org.openstreetmap.josm.data.projection.proj.ProjParameters;
34import org.openstreetmap.josm.tools.JosmRuntimeException;
35import org.openstreetmap.josm.tools.Logging;
36import org.openstreetmap.josm.tools.Utils;
37import org.openstreetmap.josm.tools.bugreport.BugReport;
38
39/**
40 * Custom projection.
41 *
42 * Inspired by PROJ.4 and Proj4J.
43 * @since 5072
44 */
45public class CustomProjection extends AbstractProjection {
46
47 /*
48 * Equation for METER_PER_UNIT_DEGREE taken from:
49 * https://github.com/openlayers/ol3/blob/master/src/ol/proj/epsg4326projection.js#L58
50 * Value for Radius taken form:
51 * https://github.com/openlayers/ol3/blob/master/src/ol/sphere/wgs84sphere.js#L11
52 */
53 private static final double METER_PER_UNIT_DEGREE = 2 * Math.PI * 6378137.0 / 360;
54 private static final Map<String, Double> UNITS_TO_METERS = getUnitsToMeters();
55 private static final Map<String, Double> PRIME_MERIDANS = getPrimeMeridians();
56
57 /**
58 * pref String that defines the projection
59 *
60 * null means fall back mode (Mercator)
61 */
62 protected String pref;
63 protected String name;
64 protected String code;
65 protected Bounds bounds;
66 private double metersPerUnitWMTS;
67 private String axis = "enu"; // default axis orientation is East, North, Up
68
69 private static final List<String> LON_LAT_VALUES = Arrays.asList("longlat", "latlon", "latlong");
70
71 /**
72 * Proj4-like projection parameters. See <a href="https://trac.osgeo.org/proj/wiki/GenParms">reference</a>.
73 * @since 7370 (public)
74 */
75 public enum Param {
76
77 /** False easting */
78 x_0("x_0", true),
79 /** False northing */
80 y_0("y_0", true),
81 /** Central meridian */
82 lon_0("lon_0", true),
83 /** Prime meridian */
84 pm("pm", true),
85 /** Scaling factor */
86 k_0("k_0", true),
87 /** Ellipsoid name (see {@code proj -le}) */
88 ellps("ellps", true),
89 /** Semimajor radius of the ellipsoid axis */
90 a("a", true),
91 /** Eccentricity of the ellipsoid squared */
92 es("es", true),
93 /** Reciprocal of the ellipsoid flattening term (e.g. 298) */
94 rf("rf", true),
95 /** Flattening of the ellipsoid = 1-sqrt(1-e^2) */
96 f("f", true),
97 /** Semiminor radius of the ellipsoid axis */
98 b("b", true),
99 /** Datum name (see {@code proj -ld}) */
100 datum("datum", true),
101 /** 3 or 7 term datum transform parameters */
102 towgs84("towgs84", true),
103 /** Filename of NTv2 grid file to use for datum transforms */
104 nadgrids("nadgrids", true),
105 /** Projection name (see {@code proj -l}) */
106 proj("proj", true),
107 /** Latitude of origin */
108 lat_0("lat_0", true),
109 /** Latitude of first standard parallel */
110 lat_1("lat_1", true),
111 /** Latitude of second standard parallel */
112 lat_2("lat_2", true),
113 /** Latitude of true scale (Polar Stereographic) */
114 lat_ts("lat_ts", true),
115 /** longitude of the center of the projection (Oblique Mercator) */
116 lonc("lonc", true),
117 /** azimuth (true) of the center line passing through the center of the
118 * projection (Oblique Mercator) */
119 alpha("alpha", true),
120 /** rectified bearing of the center line (Oblique Mercator) */
121 gamma("gamma", true),
122 /** select "Hotine" variant of Oblique Mercator */
123 no_off("no_off", false),
124 /** legacy alias for no_off */
125 no_uoff("no_uoff", false),
126 /** longitude of first point (Oblique Mercator) */
127 lon_1("lon_1", true),
128 /** longitude of second point (Oblique Mercator) */
129 lon_2("lon_2", true),
130 /** the exact proj.4 string will be preserved in the WKT representation */
131 wktext("wktext", false), // ignored
132 /** meters, US survey feet, etc. */
133 units("units", true),
134 /** Don't use the /usr/share/proj/proj_def.dat defaults file */
135 no_defs("no_defs", false),
136 init("init", true),
137 /** crs units to meter multiplier */
138 to_meter("to_meter", true),
139 /** definition of axis for projection */
140 axis("axis", true),
141 /** UTM zone */
142 zone("zone", true),
143 /** indicate southern hemisphere for UTM */
144 south("south", false),
145 /** vertical units - ignore, as we don't use height information */
146 vunits("vunits", true),
147 // JOSM extensions, not present in PROJ.4
148 wmssrs("wmssrs", true),
149 bounds("bounds", true);
150
151 /** Parameter key */
152 public final String key;
153 /** {@code true} if the parameter has a value */
154 public final boolean hasValue;
155
156 /** Map of all parameters by key */
157 static final Map<String, Param> paramsByKey = new ConcurrentHashMap<>();
158 static {
159 for (Param p : Param.values()) {
160 paramsByKey.put(p.key, p);
161 }
162 // alias
163 paramsByKey.put("k", Param.k_0);
164 }
165
166 Param(String key, boolean hasValue) {
167 this.key = key;
168 this.hasValue = hasValue;
169 }
170 }
171
172 enum Polarity {
173 NORTH(LatLon.NORTH_POLE),
174 SOUTH(LatLon.SOUTH_POLE);
175
176 private final LatLon latlon;
177
178 Polarity(LatLon latlon) {
179 this.latlon = latlon;
180 }
181
182 LatLon getLatLon() {
183 return latlon;
184 }
185 }
186
187 private EnumMap<Polarity, EastNorth> polesEN;
188
189 /**
190 * Constructs a new empty {@code CustomProjection}.
191 */
192 public CustomProjection() {
193 // contents can be set later with update()
194 }
195
196 /**
197 * Constructs a new {@code CustomProjection} with given parameters.
198 * @param pref String containing projection parameters
199 * (ex: "+proj=tmerc +lon_0=-3 +k_0=0.9996 +x_0=500000 +ellps=WGS84 +datum=WGS84 +bounds=-8,-5,2,85")
200 */
201 public CustomProjection(String pref) {
202 this(null, null, pref);
203 }
204
205 /**
206 * Constructs a new {@code CustomProjection} with given name, code and parameters.
207 *
208 * @param name describe projection in one or two words
209 * @param code unique code for this projection - may be null
210 * @param pref the string that defines the custom projection
211 */
212 public CustomProjection(String name, String code, String pref) {
213 this.name = name;
214 this.code = code;
215 this.pref = pref;
216 try {
217 update(pref);
218 } catch (ProjectionConfigurationException ex) {
219 Logging.trace(ex);
220 try {
221 update(null);
222 } catch (ProjectionConfigurationException ex1) {
223 throw BugReport.intercept(ex1).put("name", name).put("code", code).put("pref", pref);
224 }
225 }
226 }
227
228 /**
229 * Updates this {@code CustomProjection} with given parameters.
230 * @param pref String containing projection parameters (ex: "+proj=lonlat +ellps=WGS84 +datum=WGS84 +bounds=-180,-90,180,90")
231 * @throws ProjectionConfigurationException if {@code pref} cannot be parsed properly
232 */
233 public final void update(String pref) throws ProjectionConfigurationException {
234 this.pref = pref;
235 if (pref == null) {
236 ellps = Ellipsoid.WGS84;
237 datum = WGS84Datum.INSTANCE;
238 proj = new Mercator();
239 bounds = new Bounds(
240 -85.05112877980659, -180.0,
241 85.05112877980659, 180.0, true);
242 } else {
243 Map<String, String> parameters = parseParameterList(pref, false);
244 parameters = resolveInits(parameters, false);
245 ellps = parseEllipsoid(parameters);
246 datum = parseDatum(parameters, ellps);
247 if (ellps == null) {
248 ellps = datum.getEllipsoid();
249 }
250 proj = parseProjection(parameters, ellps);
251 // "utm" is a shortcut for a set of parameters
252 if ("utm".equals(parameters.get(Param.proj.key))) {
253 Integer zone;
254 try {
255 zone = Integer.valueOf(Optional.ofNullable(parameters.get(Param.zone.key)).orElseThrow(
256 () -> new ProjectionConfigurationException(tr("UTM projection (''+proj=utm'') requires ''+zone=...'' parameter."))));
257 } catch (NumberFormatException e) {
258 zone = null;
259 }
260 if (zone == null || zone < 1 || zone > 60)
261 throw new ProjectionConfigurationException(tr("Expected integer value in range 1-60 for ''+zone=...'' parameter."));
262 this.lon0 = 6d * zone - 183d;
263 this.k0 = 0.9996;
264 this.x0 = 500_000;
265 this.y0 = parameters.containsKey(Param.south.key) ? 10_000_000 : 0;
266 }
267 String s = parameters.get(Param.x_0.key);
268 if (s != null) {
269 this.x0 = parseDouble(s, Param.x_0.key);
270 }
271 s = parameters.get(Param.y_0.key);
272 if (s != null) {
273 this.y0 = parseDouble(s, Param.y_0.key);
274 }
275 s = parameters.get(Param.lon_0.key);
276 if (s != null) {
277 this.lon0 = parseAngle(s, Param.lon_0.key);
278 }
279 if (proj instanceof ICentralMeridianProvider) {
280 this.lon0 = ((ICentralMeridianProvider) proj).getCentralMeridian();
281 }
282 s = parameters.get(Param.pm.key);
283 if (s != null) {
284 if (PRIME_MERIDANS.containsKey(s)) {
285 this.pm = PRIME_MERIDANS.get(s);
286 } else {
287 this.pm = parseAngle(s, Param.pm.key);
288 }
289 }
290 s = parameters.get(Param.k_0.key);
291 if (s != null) {
292 this.k0 = parseDouble(s, Param.k_0.key);
293 }
294 if (proj instanceof IScaleFactorProvider) {
295 this.k0 *= ((IScaleFactorProvider) proj).getScaleFactor();
296 }
297 s = parameters.get(Param.bounds.key);
298 this.bounds = s != null ? parseBounds(s) : null;
299 s = parameters.get(Param.wmssrs.key);
300 if (s != null) {
301 this.code = s;
302 }
303 boolean defaultUnits = true;
304 s = parameters.get(Param.units.key);
305 if (s != null) {
306 s = Utils.strip(s, "\"");
307 if (UNITS_TO_METERS.containsKey(s)) {
308 this.toMeter = UNITS_TO_METERS.get(s);
309 this.metersPerUnitWMTS = this.toMeter;
310 defaultUnits = false;
311 } else {
312 throw new ProjectionConfigurationException(tr("No unit found for: {0}", s));
313 }
314 }
315 s = parameters.get(Param.to_meter.key);
316 if (s != null) {
317 this.toMeter = parseDouble(s, Param.to_meter.key);
318 this.metersPerUnitWMTS = this.toMeter;
319 defaultUnits = false;
320 }
321 if (defaultUnits) {
322 this.toMeter = 1;
323 this.metersPerUnitWMTS = proj.isGeographic() ? METER_PER_UNIT_DEGREE : 1;
324 }
325 s = parameters.get(Param.axis.key);
326 if (s != null) {
327 this.axis = s;
328 }
329 }
330 }
331
332 /**
333 * Parse a parameter list to key=value pairs.
334 *
335 * @param pref the parameter list
336 * @param ignoreUnknownParameter true, if unknown parameter should not raise exception
337 * @return parameters map
338 * @throws ProjectionConfigurationException in case of invalid parameter
339 */
340 public static Map<String, String> parseParameterList(String pref, boolean ignoreUnknownParameter) throws ProjectionConfigurationException {
341 Map<String, String> parameters = new HashMap<>();
342 String trimmedPref = pref.trim();
343 if (trimmedPref.isEmpty()) {
344 return parameters;
345 }
346
347 Pattern keyPattern = Pattern.compile("\\+(?<key>[a-zA-Z0-9_]+)(=(?<value>.*))?");
348 String[] parts = Utils.WHITE_SPACES_PATTERN.split(trimmedPref);
349 for (String part : parts) {
350 Matcher m = keyPattern.matcher(part);
351 if (m.matches()) {
352 String key = m.group("key");
353 String value = m.group("value");
354 // some aliases
355 if (key.equals(Param.proj.key) && LON_LAT_VALUES.contains(value)) {
356 value = "lonlat";
357 }
358 Param param = Param.paramsByKey.get(key);
359 if (param == null) {
360 if (!ignoreUnknownParameter)
361 throw new ProjectionConfigurationException(tr("Unknown parameter: ''{0}''.", key));
362 } else {
363 if (param.hasValue && value == null)
364 throw new ProjectionConfigurationException(tr("Value expected for parameter ''{0}''.", key));
365 if (!param.hasValue && value != null)
366 throw new ProjectionConfigurationException(tr("No value expected for parameter ''{0}''.", key));
367 key = param.key; // To be really sure, we might have an alias.
368 }
369 parameters.put(key, value);
370 } else if (!part.startsWith("+")) {
371 throw new ProjectionConfigurationException(tr("Parameter must begin with a ''+'' character (found ''{0}'')", part));
372 } else {
373 throw new ProjectionConfigurationException(tr("Unexpected parameter format (''{0}'')", part));
374 }
375 }
376 return parameters;
377 }
378
379 /**
380 * Recursive resolution of +init includes.
381 *
382 * @param parameters parameters map
383 * @param ignoreUnknownParameter true, if unknown parameter should not raise exception
384 * @return parameters map with +init includes resolved
385 * @throws ProjectionConfigurationException in case of invalid parameter
386 */
387 public static Map<String, String> resolveInits(Map<String, String> parameters, boolean ignoreUnknownParameter)
388 throws ProjectionConfigurationException {
389 // recursive resolution of +init includes
390 String initKey = parameters.get(Param.init.key);
391 if (initKey != null) {
392 Map<String, String> initp;
393 try {
394 initp = parseParameterList(Optional.ofNullable(Projections.getInit(initKey)).orElseThrow(
395 () -> new ProjectionConfigurationException(tr("Value ''{0}'' for option +init not supported.", initKey))),
396 ignoreUnknownParameter);
397 initp = resolveInits(initp, ignoreUnknownParameter);
398 } catch (ProjectionConfigurationException ex) {
399 throw new ProjectionConfigurationException(initKey+": "+ex.getMessage(), ex);
400 }
401 initp.putAll(parameters);
402 return initp;
403 }
404 return parameters;
405 }
406
407 /**
408 * Gets the ellipsoid
409 * @param parameters The parameters to get the value from
410 * @return The Ellipsoid as specified with the parameters
411 * @throws ProjectionConfigurationException in case of invalid parameters
412 */
413 public Ellipsoid parseEllipsoid(Map<String, String> parameters) throws ProjectionConfigurationException {
414 String code = parameters.get(Param.ellps.key);
415 if (code != null) {
416 return Optional.ofNullable(Projections.getEllipsoid(code)).orElseThrow(
417 () -> new ProjectionConfigurationException(tr("Ellipsoid ''{0}'' not supported.", code)));
418 }
419 String s = parameters.get(Param.a.key);
420 if (s != null) {
421 double a = parseDouble(s, Param.a.key);
422 if (parameters.get(Param.es.key) != null) {
423 double es = parseDouble(parameters, Param.es.key);
424 return Ellipsoid.createAes(a, es);
425 }
426 if (parameters.get(Param.rf.key) != null) {
427 double rf = parseDouble(parameters, Param.rf.key);
428 return Ellipsoid.createArf(a, rf);
429 }
430 if (parameters.get(Param.f.key) != null) {
431 double f = parseDouble(parameters, Param.f.key);
432 return Ellipsoid.createAf(a, f);
433 }
434 if (parameters.get(Param.b.key) != null) {
435 double b = parseDouble(parameters, Param.b.key);
436 return Ellipsoid.createAb(a, b);
437 }
438 }
439 if (parameters.containsKey(Param.a.key) ||
440 parameters.containsKey(Param.es.key) ||
441 parameters.containsKey(Param.rf.key) ||
442 parameters.containsKey(Param.f.key) ||
443 parameters.containsKey(Param.b.key))
444 throw new ProjectionConfigurationException(tr("Combination of ellipsoid parameters is not supported."));
445 return null;
446 }
447
448 /**
449 * Gets the datum
450 * @param parameters The parameters to get the value from
451 * @param ellps The ellisoid that was previously computed
452 * @return The Datum as specified with the parameters
453 * @throws ProjectionConfigurationException in case of invalid parameters
454 */
455 public Datum parseDatum(Map<String, String> parameters, Ellipsoid ellps) throws ProjectionConfigurationException {
456 Datum result = null;
457 String datumId = parameters.get(Param.datum.key);
458 if (datumId != null) {
459 result = Optional.ofNullable(Projections.getDatum(datumId)).orElseThrow(
460 () -> new ProjectionConfigurationException(tr("Unknown datum identifier: ''{0}''", datumId)));
461 }
462 if (ellps == null) {
463 if (result == null && parameters.containsKey(Param.no_defs.key))
464 throw new ProjectionConfigurationException(tr("Ellipsoid required (+ellps=* or +a=*, +b=*)"));
465 // nothing specified, use WGS84 as default
466 ellps = result != null ? result.getEllipsoid() : Ellipsoid.WGS84;
467 }
468
469 String nadgridsId = parameters.get(Param.nadgrids.key);
470 if (nadgridsId != null) {
471 if (nadgridsId.startsWith("@")) {
472 nadgridsId = nadgridsId.substring(1);
473 }
474 if ("null".equals(nadgridsId))
475 return new NullDatum(null, ellps);
476 final String fNadgridsId = nadgridsId;
477 return new NTV2Datum(fNadgridsId, null, ellps, Optional.ofNullable(Projections.getNTV2Grid(fNadgridsId)).orElseThrow(
478 () -> new ProjectionConfigurationException(tr("Grid shift file ''{0}'' for option +nadgrids not supported.", fNadgridsId))));
479 }
480
481 String towgs84 = parameters.get(Param.towgs84.key);
482 if (towgs84 != null) {
483 Datum towgs84Datum = parseToWGS84(towgs84, ellps);
484 if (result == null || towgs84Datum instanceof ThreeParameterDatum || towgs84Datum instanceof SevenParameterDatum) {
485 // +datum has priority over +towgs84=0,0,0[,0,0,0,0]
486 return towgs84Datum;
487 }
488 }
489
490 return result != null ? result : new NullDatum(null, ellps);
491 }
492
493 /**
494 * Parse {@code towgs84} parameter.
495 * @param paramList List of parameter arguments (expected: 3 or 7)
496 * @param ellps ellipsoid
497 * @return parsed datum ({@link ThreeParameterDatum} or {@link SevenParameterDatum})
498 * @throws ProjectionConfigurationException if the arguments cannot be parsed
499 */
500 public Datum parseToWGS84(String paramList, Ellipsoid ellps) throws ProjectionConfigurationException {
501 String[] numStr = paramList.split(",");
502
503 if (numStr.length != 3 && numStr.length != 7)
504 throw new ProjectionConfigurationException(tr("Unexpected number of arguments for parameter ''towgs84'' (must be 3 or 7)"));
505 List<Double> towgs84Param = new ArrayList<>();
506 for (String str : numStr) {
507 try {
508 towgs84Param.add(Double.valueOf(str));
509 } catch (NumberFormatException e) {
510 throw new ProjectionConfigurationException(tr("Unable to parse value of parameter ''towgs84'' (''{0}'')", str), e);
511 }
512 }
513 boolean isCentric = true;
514 for (Double param : towgs84Param) {
515 if (param != 0) {
516 isCentric = false;
517 break;
518 }
519 }
520 if (isCentric)
521 return Ellipsoid.WGS84.equals(ellps) ? WGS84Datum.INSTANCE : new CentricDatum(null, null, ellps);
522 boolean is3Param = true;
523 for (int i = 3; i < towgs84Param.size(); i++) {
524 if (towgs84Param.get(i) != 0) {
525 is3Param = false;
526 break;
527 }
528 }
529 if (is3Param)
530 return new ThreeParameterDatum(null, null, ellps,
531 towgs84Param.get(0),
532 towgs84Param.get(1),
533 towgs84Param.get(2));
534 else
535 return new SevenParameterDatum(null, null, ellps,
536 towgs84Param.get(0),
537 towgs84Param.get(1),
538 towgs84Param.get(2),
539 towgs84Param.get(3),
540 towgs84Param.get(4),
541 towgs84Param.get(5),
542 towgs84Param.get(6));
543 }
544
545 /**
546 * Gets a projection using the given ellipsoid
547 * @param parameters Additional parameters
548 * @param ellps The {@link Ellipsoid}
549 * @return The projection
550 * @throws ProjectionConfigurationException in case of invalid parameters
551 */
552 public Proj parseProjection(Map<String, String> parameters, Ellipsoid ellps) throws ProjectionConfigurationException {
553 String id = parameters.get(Param.proj.key);
554 if (id == null) throw new ProjectionConfigurationException(tr("Projection required (+proj=*)"));
555
556 // "utm" is not a real projection, but a shortcut for a set of parameters
557 if ("utm".equals(id)) {
558 id = "tmerc";
559 }
560 Proj proj = Projections.getBaseProjection(id);
561 if (proj == null) throw new ProjectionConfigurationException(tr("Unknown projection identifier: ''{0}''", id));
562
563 ProjParameters projParams = new ProjParameters();
564
565 projParams.ellps = ellps;
566
567 String s;
568 s = parameters.get(Param.lat_0.key);
569 if (s != null) {
570 projParams.lat0 = parseAngle(s, Param.lat_0.key);
571 }
572 s = parameters.get(Param.lat_1.key);
573 if (s != null) {
574 projParams.lat1 = parseAngle(s, Param.lat_1.key);
575 }
576 s = parameters.get(Param.lat_2.key);
577 if (s != null) {
578 projParams.lat2 = parseAngle(s, Param.lat_2.key);
579 }
580 s = parameters.get(Param.lat_ts.key);
581 if (s != null) {
582 projParams.lat_ts = parseAngle(s, Param.lat_ts.key);
583 }
584 s = parameters.get(Param.lonc.key);
585 if (s != null) {
586 projParams.lonc = parseAngle(s, Param.lonc.key);
587 }
588 s = parameters.get(Param.alpha.key);
589 if (s != null) {
590 projParams.alpha = parseAngle(s, Param.alpha.key);
591 }
592 s = parameters.get(Param.gamma.key);
593 if (s != null) {
594 projParams.gamma = parseAngle(s, Param.gamma.key);
595 }
596 s = parameters.get(Param.lon_0.key);
597 if (s != null) {
598 projParams.lon0 = parseAngle(s, Param.lon_0.key);
599 }
600 s = parameters.get(Param.lon_1.key);
601 if (s != null) {
602 projParams.lon1 = parseAngle(s, Param.lon_1.key);
603 }
604 s = parameters.get(Param.lon_2.key);
605 if (s != null) {
606 projParams.lon2 = parseAngle(s, Param.lon_2.key);
607 }
608 if (parameters.containsKey(Param.no_off.key) || parameters.containsKey(Param.no_uoff.key)) {
609 projParams.no_off = Boolean.TRUE;
610 }
611 proj.initialize(projParams);
612 return proj;
613 }
614
615 /**
616 * Converts a string to a bounds object
617 * @param boundsStr The string as comma separated list of angles.
618 * @return The bounds.
619 * @throws ProjectionConfigurationException in case of invalid parameter
620 * @see CustomProjection#parseAngle(String, String)
621 */
622 public static Bounds parseBounds(String boundsStr) throws ProjectionConfigurationException {
623 String[] numStr = boundsStr.split(",");
624 if (numStr.length != 4)
625 throw new ProjectionConfigurationException(tr("Unexpected number of arguments for parameter ''+bounds'' (must be 4)"));
626 return new Bounds(parseAngle(numStr[1], "minlat (+bounds)"),
627 parseAngle(numStr[0], "minlon (+bounds)"),
628 parseAngle(numStr[3], "maxlat (+bounds)"),
629 parseAngle(numStr[2], "maxlon (+bounds)"), false);
630 }
631
632 public static double parseDouble(Map<String, String> parameters, String parameterName) throws ProjectionConfigurationException {
633 if (!parameters.containsKey(parameterName))
634 throw new ProjectionConfigurationException(tr("Unknown parameter ''{0}''", parameterName));
635 return parseDouble(Optional.ofNullable(parameters.get(parameterName)).orElseThrow(
636 () -> new ProjectionConfigurationException(tr("Expected number argument for parameter ''{0}''", parameterName))),
637 parameterName);
638 }
639
640 public static double parseDouble(String doubleStr, String parameterName) throws ProjectionConfigurationException {
641 try {
642 return Double.parseDouble(doubleStr);
643 } catch (NumberFormatException e) {
644 throw new ProjectionConfigurationException(
645 tr("Unable to parse value ''{1}'' of parameter ''{0}'' as number.", parameterName, doubleStr), e);
646 }
647 }
648
649 /**
650 * Convert an angle string to a double value
651 * @param angleStr The string. e.g. -1.1 or 50d10'3"
652 * @param parameterName Only for error message.
653 * @return The angle value, in degrees.
654 * @throws ProjectionConfigurationException in case of invalid parameter
655 */
656 public static double parseAngle(String angleStr, String parameterName) throws ProjectionConfigurationException {
657 try {
658 return LatLonParser.parseCoordinate(angleStr);
659 } catch (IllegalArgumentException e) {
660 throw new ProjectionConfigurationException(
661 tr("Unable to parse value ''{1}'' of parameter ''{0}'' as coordinate value.", parameterName, angleStr), e);
662 }
663 }
664
665 @Override
666 public Integer getEpsgCode() {
667 if (code != null && code.startsWith("EPSG:")) {
668 try {
669 return Integer.valueOf(code.substring(5));
670 } catch (NumberFormatException e) {
671 Logging.warn(e);
672 }
673 }
674 return null;
675 }
676
677 @Override
678 public String toCode() {
679 if (code != null) {
680 return code;
681 } else if (pref != null) {
682 return "proj:" + pref;
683 } else {
684 return "proj:ERROR";
685 }
686 }
687
688 @Override
689 public Bounds getWorldBoundsLatLon() {
690 if (bounds == null) {
691 Bounds ab = proj.getAlgorithmBounds();
692 if (ab != null) {
693 double minlon = Math.max(ab.getMinLon() + lon0 + pm, -180);
694 double maxlon = Math.min(ab.getMaxLon() + lon0 + pm, 180);
695 bounds = new Bounds(ab.getMinLat(), minlon, ab.getMaxLat(), maxlon, false);
696 } else {
697 bounds = new Bounds(
698 new LatLon(-90.0, -180.0),
699 new LatLon(90.0, 180.0));
700 }
701 }
702 return bounds;
703 }
704
705 @Override
706 public String toString() {
707 return name != null ? name : tr("Custom Projection");
708 }
709
710 /**
711 * Factor to convert units of east/north coordinates to meters.
712 *
713 * When east/north coordinates are in degrees (geographic CRS), the scale
714 * at the equator is taken, i.e. 360 degrees corresponds to the length of
715 * the equator in meters.
716 *
717 * @return factor to convert units to meter
718 */
719 @Override
720 public double getMetersPerUnit() {
721 return metersPerUnitWMTS;
722 }
723
724 @Override
725 public boolean switchXY() {
726 // TODO: support for other axis orientation such as West South, and Up Down
727 return this.axis.startsWith("ne");
728 }
729
730 private static Map<String, Double> getUnitsToMeters() {
731 Map<String, Double> ret = new ConcurrentHashMap<>();
732 ret.put("km", 1000d);
733 ret.put("m", 1d);
734 ret.put("dm", 1d/10);
735 ret.put("cm", 1d/100);
736 ret.put("mm", 1d/1000);
737 ret.put("kmi", 1852.0);
738 ret.put("in", 0.0254);
739 ret.put("ft", 0.3048);
740 ret.put("yd", 0.9144);
741 ret.put("mi", 1609.344);
742 ret.put("fathom", 1.8288);
743 ret.put("chain", 20.1168);
744 ret.put("link", 0.201168);
745 ret.put("us-in", 1d/39.37);
746 ret.put("us-ft", 0.304800609601219);
747 ret.put("us-yd", 0.914401828803658);
748 ret.put("us-ch", 20.11684023368047);
749 ret.put("us-mi", 1609.347218694437);
750 ret.put("ind-yd", 0.91439523);
751 ret.put("ind-ft", 0.30479841);
752 ret.put("ind-ch", 20.11669506);
753 ret.put("degree", METER_PER_UNIT_DEGREE);
754 return ret;
755 }
756
757 private static Map<String, Double> getPrimeMeridians() {
758 Map<String, Double> ret = new ConcurrentHashMap<>();
759 try {
760 ret.put("greenwich", 0.0);
761 ret.put("lisbon", parseAngle("9d07'54.862\"W", null));
762 ret.put("paris", parseAngle("2d20'14.025\"E", null));
763 ret.put("bogota", parseAngle("74d04'51.3\"W", null));
764 ret.put("madrid", parseAngle("3d41'16.58\"W", null));
765 ret.put("rome", parseAngle("12d27'8.4\"E", null));
766 ret.put("bern", parseAngle("7d26'22.5\"E", null));
767 ret.put("jakarta", parseAngle("106d48'27.79\"E", null));
768 ret.put("ferro", parseAngle("17d40'W", null));
769 ret.put("brussels", parseAngle("4d22'4.71\"E", null));
770 ret.put("stockholm", parseAngle("18d3'29.8\"E", null));
771 ret.put("athens", parseAngle("23d42'58.815\"E", null));
772 ret.put("oslo", parseAngle("10d43'22.5\"E", null));
773 } catch (ProjectionConfigurationException ex) {
774 throw new IllegalStateException(ex);
775 }
776 return ret;
777 }
778
779 private static EastNorth getPointAlong(int i, int n, ProjectionBounds r) {
780 double dEast = (r.maxEast - r.minEast) / n;
781 double dNorth = (r.maxNorth - r.minNorth) / n;
782 if (i < n) {
783 return new EastNorth(r.minEast + i * dEast, r.minNorth);
784 } else if (i < 2*n) {
785 i -= n;
786 return new EastNorth(r.maxEast, r.minNorth + i * dNorth);
787 } else if (i < 3*n) {
788 i -= 2*n;
789 return new EastNorth(r.maxEast - i * dEast, r.maxNorth);
790 } else if (i < 4*n) {
791 i -= 3*n;
792 return new EastNorth(r.minEast, r.maxNorth - i * dNorth);
793 } else {
794 throw new AssertionError();
795 }
796 }
797
798 private EastNorth getPole(Polarity whichPole) {
799 if (polesEN == null) {
800 polesEN = new EnumMap<>(Polarity.class);
801 for (Polarity p : Polarity.values()) {
802 polesEN.put(p, null);
803 LatLon ll = p.getLatLon();
804 try {
805 EastNorth enPole = latlon2eastNorth(ll);
806 if (enPole.isValid()) {
807 // project back and check if the result is somewhat reasonable
808 LatLon llBack = eastNorth2latlon(enPole);
809 if (llBack.isValid() && ll.greatCircleDistance(llBack) < 1000) {
810 polesEN.put(p, enPole);
811 }
812 }
813 } catch (JosmRuntimeException | IllegalArgumentException | IllegalStateException e) {
814 Logging.error(e);
815 }
816 }
817 }
818 return polesEN.get(whichPole);
819 }
820
821 @Override
822 public Bounds getLatLonBoundsBox(ProjectionBounds r) {
823 final int n = 10;
824 Bounds result = new Bounds(eastNorth2latlon(r.getMin()));
825 result.extend(eastNorth2latlon(r.getMax()));
826 LatLon llPrev = null;
827 for (int i = 0; i < 4*n; i++) {
828 LatLon llNow = eastNorth2latlon(getPointAlong(i, n, r));
829 result.extend(llNow);
830 // check if segment crosses 180th meridian and if so, make sure
831 // to extend bounds to +/-180 degrees longitude
832 if (llPrev != null) {
833 double lon1 = llPrev.lon();
834 double lon2 = llNow.lon();
835 if (90 < lon1 && lon1 < 180 && -180 < lon2 && lon2 < -90) {
836 result.extend(new LatLon(llPrev.lat(), 180));
837 result.extend(new LatLon(llNow.lat(), -180));
838 }
839 if (90 < lon2 && lon2 < 180 && -180 < lon1 && lon1 < -90) {
840 result.extend(new LatLon(llNow.lat(), 180));
841 result.extend(new LatLon(llPrev.lat(), -180));
842 }
843 }
844 llPrev = llNow;
845 }
846 // if the box contains one of the poles, the above method did not get
847 // correct min/max latitude value
848 for (Polarity p : Polarity.values()) {
849 EastNorth pole = getPole(p);
850 if (pole != null && r.contains(pole)) {
851 result.extend(p.getLatLon());
852 }
853 }
854 return result;
855 }
856
857 @Override
858 public ProjectionBounds getEastNorthBoundsBox(ProjectionBounds box, Projection boxProjection) {
859 final int n = 8;
860 ProjectionBounds result = null;
861 for (int i = 0; i < 4*n; i++) {
862 EastNorth en = latlon2eastNorth(boxProjection.eastNorth2latlon(getPointAlong(i, n, box)));
863 if (result == null) {
864 result = new ProjectionBounds(en);
865 } else {
866 result.extend(en);
867 }
868 }
869 return result;
870 }
871
872 /**
873 * Return true, if a geographic coordinate reference system is represented.
874 *
875 * I.e. if it returns latitude/longitude values rather than Cartesian
876 * east/north coordinates on a flat surface.
877 * @return true, if it is geographic
878 * @since 12792
879 */
880 public boolean isGeographic() {
881 return proj.isGeographic();
882 }
883
884}
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