WebSVN - mkgmap - Rev 2657 - /u/MkgMaxl/main/src/uk/me/parabola/mkgmap/reader/osm/POIGeneratorHook.java

/*
* Copyright (C) 2011.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 or
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/

package uk.me.parabola.mkgmap.reader.osm;

import java.util.AbstractMap;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import uk.me.parabola.imgfmt.app.Coord;
import uk.me.parabola.log.Logger;
import uk.me.parabola.util.EnhancedProperties;

/**
* Adds a POI for each area and multipolygon with the same tags in case the add-pois-to-areas option
* is set. Adds multiple POIs to each line if the add-pois-to-lines option is set. 
* 
* <code>add-pois-to-areas</code> 
* Artificial areas created by
* multipolygon relation processing are not used for POI creation. The location of the POI
* is determined in different ways. 
* Element is of type {@link Way}:
* <ul>
* <li>the first node tagged with building=entrance</li>
* <li>the center point of the area</li>
* </ul>
* Element is of type {@link MultiPolygonRelation}:
* <ul>
* <li>the node with role=label</li>
* <li>the center point of the biggest area</li>
* </ul>
* Each node created is tagged with mkgmap:area2poi=true. 
* 
* <code>add-pois-to-lines</code> 
* Adds POIs to lines. Each POI is tagged with mkgmap:line2poi=true. 
* The following POIs are created for each line:
* <ul>
* <li>mkgmap:line2poitype=start: The first point of the line</li>
* <li>mkgmap:line2poitype=end: The last point of the line</li>
* <li>mkgmap:line2poitype=inner: Each inner point of the line</li>
* <li>mkgmap:line2poitype=mid: POI at the middle distance of the line</li>
* </ul>
* @author WanMil
*/
public class POIGeneratorHook extends OsmReadingHooksAdaptor {
private static final Logger log = Logger.getLogger(POIGeneratorHook.class);

private List<Entry<String,String>> poiPlacementTags;

private ElementSaver saver;

private boolean poisToAreas = false;
private boolean poisToLines = false;

/** Name of the bool tag that is set to true if a POI is created from an area */
public static final String AREA2POI_TAG = "mkgmap:area2poi";
public static final String LINE2POI_TAG = "mkgmap:line2poi";
public static final String LINE2POI_TYPE_TAG = "mkgmap:line2poitype";

public boolean init(ElementSaver saver, EnhancedProperties props) {
poisToAreas = props.containsKey("add-pois-to-areas");
poisToLines = props.containsKey("add-pois-to-lines");

if ((poisToAreas || poisToLines) == false) {
log.info("Disable Areas2POIHook because add-pois-to-areas and add-pois-to-lines option is not set.");
return false;
}

this.poiPlacementTags = getPoiPlacementTags(props);

this.saver = saver;

return true;
}

/**
* Reads the tag definitions of the option poi2area-placement-tags from the given properties.
* @param props mkgmap options
* @return the parsed tag definition list
*/
public static List<Entry<String,String>> getPoiPlacementTags(EnhancedProperties props) {
if (props.containsKey("add-pois-to-areas") == false) {
return Collections.emptyList();
}

List<Entry<String,String>> tagList = new ArrayList<Entry<String,String>>();

String placementDefs = props.getProperty("pois-to-areas-placement", "entrance=main;entrance=yes;building=entrance");
placementDefs = placementDefs.trim();

if (placementDefs.length() == 0) {
// the POIs should be placed in the center only
// => return an empty list
return tagList;
}

String[] placementDefsParts = placementDefs.split(";");
for (String placementDef : placementDefsParts) {
int ind = placementDef.indexOf('=');
String tagName = null;
String tagValue = null;
if (ind < 0) {
// only the tag is defined => interpret it as tag=*
tagName = placementDef;
tagValue = null;
} else if (ind > 0) {
tagName = placementDef.substring(0,ind);
tagValue = placementDef.substring(ind+1);
} else {
log.error("Option pois-to-areas-placement contains a tag that starts with '='. This is not allowed. Ignoring it.");
continue;
}
tagName = tagName.trim();
if (tagName.length() == 0) {
log.error("Option pois-to-areas-placement contains a whitespace tag '='. This is not allowed. Ignoring it.");
continue;
}
if (tagValue != null) {
tagValue = tagValue.trim();
if (tagValue.length() == 0 || "*".equals(tagValue)) {
tagValue = null;
}
}
Entry<String,String> tag = new AbstractMap.SimpleImmutableEntry<String,String>(tagName, tagValue);
tagList.add(tag);
}
return tagList;
}

public Set<String> getUsedTags() {
// return all tags defined in the poiPlacementTags
Set<String> tags = new HashSet<String>();
for (Entry<String,String> poiTag : poiPlacementTags) {
tags.add(poiTag.getKey());
}
return tags;
}

public void end() {
log.info("Areas2POIHook started");
addPOIsToWays();
addPOIsToMPs();
log.info("Areas2POIHook finished");
}

private int getPlacementOrder(Element elem) {
for (int order = 0; order < poiPlacementTags.size(); order++) {
Entry<String,String> poiTagDef = poiPlacementTags.get(order);
String tagValue = elem.getTag(poiTagDef.getKey());
if (tagValue != null) {
if (poiTagDef.getValue() == null || poiTagDef.getValue().equals(tagValue)) {
return order;
}
}
}
// no poi tag match
return -1;
}

private void addPOIsToWays() {
Map<Coord, Integer> labelCoords = new HashMap<Coord, Integer>();

// save all coords with one of the placement tags to a map
// so that ways use this coord as its labeling point
if (poiPlacementTags.isEmpty() == false && poisToAreas) {
for (Node n : saver.getNodes().values()) {
int order = getPlacementOrder(n);
if (order >= 0) {
Integer prevOrder = labelCoords.get(n.getLocation());
if (prevOrder == null || order < prevOrder.intValue())
labelCoords.put(n.getLocation(), order);
}
}
}

log.debug("Found", labelCoords.size(), "label coords");

int ways2POI = 0;
int lines2POI = 0;

for (Way w : saver.getWays().values()) {
// check if way has any tags
if (w.getTagCount() == 0) {
continue;
}

// do not add POIs for polygons created by multipolygon processing
if (w.isBoolTag(MultiPolygonRelation.MP_CREATED_TAG)) {
if (log.isDebugEnabled())
log.debug("MP processed: Do not create POI for", w.toTagString());
continue;
}

// check if it is an area
if (w.isClosed()) {
if (poisToAreas) {
addPOItoPolygon(w, labelCoords);
ways2POI++;
}
} else {
if (poisToLines) {
lines2POI += addPOItoLine(w);
}
}
}

if (poisToAreas)
log.info(ways2POI, "POIs from single areas created");
if (poisToLines)
log.info(lines2POI, "POIs from lines created");
}

private void addPOItoPolygon(Way polygon, Map<Coord, Integer> labelCoords) {
if (poisToAreas == false) {
return;
}

// get the coord where the poi is placed
Coord poiCoord = null;
// do we have some labeling coords?
if (labelCoords.size() > 0) {
int poiOrder = Integer.MAX_VALUE;
// go through all points of the way and check if one of the coords
// is a labeling coord
for (Coord c : polygon.getPoints()) {
Integer cOrder = labelCoords.get(c);
if (cOrder != null && cOrder.intValue() < poiOrder) {
// this coord is a labeling coord
// use it for the current way
poiCoord = c;
poiOrder = cOrder;
if (poiOrder == 0) {
// there is no higher order
break;
}
}
}
}
if (poiCoord == null) {
// did not find any label coord
// use the common center point of the area
poiCoord = polygon.getCofG();
}

Node poi = createPOI(polygon, poiCoord, AREA2POI_TAG);
saver.addNode(poi);
}

private int addPOItoLine(Way line) {
Node startNode = createPOI(line, line.getPoints().get(0), LINE2POI_TAG);
startNode.addTag(LINE2POI_TYPE_TAG,"start");
saver.addNode(startNode);

Node endNode = createPOI(line, line.getPoints().get(line.getPoints().size()-1), LINE2POI_TAG);
endNode.addTag(LINE2POI_TYPE_TAG,"end");
saver.addNode(endNode);

int noPOIs = 2;

if (line.getPoints().size() > 2) {
for (Coord inPoint : line.getPoints().subList(1, line.getPoints().size()-1)) {
Node innerNode = createPOI(line, inPoint, LINE2POI_TAG);
innerNode.addTag(LINE2POI_TYPE_TAG,"inner");
saver.addNode(innerNode);
noPOIs++;
}
}

// calculate the middle of the line
Coord prevC = null;
double sumDist = 0.0;
ArrayList<Double> dists = new ArrayList<Double>(line.getPoints().size()-1);
for (Coord c : line.getPoints()) {
if (prevC != null) {
double dist = prevC.distance(c);
dists.add(dist);
sumDist+=dist;
}
prevC = c;
}

Coord midPoint = null;
double remMidDist = sumDist/2;
for (int midPos =0; midPos < dists.size(); midPos++) {
double nextDist = dists.get(midPos);
if (remMidDist <= nextDist) {
double frac = remMidDist/nextDist;
midPoint = line.getPoints().get(midPos).makeBetweenPoint(line.getPoints().get(midPos+1), frac);
break;
}
remMidDist -= nextDist;
}

if (midPoint != null) {
Node midNode = createPOI(line, midPoint, LINE2POI_TAG);
midNode.addTag(LINE2POI_TYPE_TAG,"mid");
saver.addNode(midNode);
noPOIs++;
}

return noPOIs;

}

private Node createPOI(Element source, Coord poiCoord, String poiTypeTag) {
Node poi = new Node(FakeIdGenerator.makeFakeId(), poiCoord);
poi.copyTags(source);
poi.deleteTag(MultiPolygonRelation.STYLE_FILTER_TAG);
poi.addTag(poiTypeTag, "true");
if (log.isDebugEnabled()) {
log.debug("Create POI",poi.toTagString(),"from",source.getId(),source.toTagString());
}
return poi;

}

private void addPOIsToMPs() {
int mps2POI = 0;
for (Relation r : saver.getRelations().values()) {

// create POIs for multipolygon relations only
if (r instanceof MultiPolygonRelation == false) {
continue;
}

Coord point = ((MultiPolygonRelation)r).getCofG();
if (point == null) {
continue;
}

Node poi = createPOI(r, point, AREA2POI_TAG);
// remove the type tag which makes only sense for relations
poi.deleteTag("type");
saver.addNode(poi);
mps2POI++;
}
log.info(mps2POI,"POIs from multipolygons created");
}

}

Subversion Repositories mkgmap

(root)/u/MkgMaxl/main/src/uk/me/parabola/mkgmap/reader/osm/POIGeneratorHook.java - Rev 2657