v0.2.52..v0.2.53 changeset Line.js
Garret Voltz edited this page Feb 12, 2020
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1 revision
diff --git a/rules/Line.js b/rules/Line.js
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+/**
+ * This script conflates all linear features using Generic Conflation.
+ */
+
+"use strict";
+
+exports.candidateDistanceSigma = 1.0; // 1.0 * (CE95 + Worst CE95);
+exports.description = "Matches generic lines";
+exports.experimental = false;
+// This matcher only sets match/miss/review values to 1.0, therefore the score thresholds aren't used.
+// If that ever changes, then the generic score threshold configuration options used below should
+// be replaced with custom score threshold configuration options.
+exports.matchThreshold = parseFloat(hoot.get("conflate.match.threshold.default"));
+exports.missThreshold = parseFloat(hoot.get("conflate.miss.threshold.default"));
+exports.reviewThreshold = parseFloat(hoot.get("conflate.review.threshold.default"));
+exports.searchRadius = parseFloat(hoot.get("search.radius.generic.line"));
+exports.tagThreshold = parseFloat(hoot.get("generic.line.tag.threshold"));
+exports.baseFeatureType = "Line";
+exports.geometryType = "line";
+exports.matchCandidateCriterion = "hoot::LineCriterion"; // See #3047
+
+var angleHistogramExtractor = new hoot.AngleHistogramExtractor();
+var weightedShapeDistanceExtractor = new hoot.WeightedShapeDistanceExtractor();
+var distanceScoreExtractor = new hoot.DistanceScoreExtractor();
+var lengthScoreExtractor = new hoot.LengthScoreExtractor();
+var sublineMatcher = new hoot.MaximalSublineStringMatcher({
+ "way.matcher.max.angle": hoot.get("generic.line.matcher.max.angle"),
+ "way.subline.matcher": hoot.get("generic.line.subline.matcher")});
+
+/**
+ * Returns true if e is a candidate for a match. Implementing this method is
+ * optional, but may dramatically increase speed if you can cull some features
+ * early on. E.g. no need to check nodes for a polygon to polygon match.
+ *
+ * exports.matchCandidateCriterion takes precedence over this function and must
+ * be commented out before using it.
+ */
+exports.isMatchCandidate = function(map, e)
+{
+ return isLinear(e) && !isSpecificallyConflatable(map, e);
+};
+
+/**
+ * If this function returns true then all overlapping matches will be treated
+ * as a group. For now that means if two matches overlap then the whole group
+ * will be marked as needing review.
+ *
+ * If this function returns false the conflation routines will attempt to
+ * pick the best subset of matches that do not conflict.
+ */
+exports.isWholeGroup = function()
+{
+ return false;
+};
+
+/**
+ * Returns the match score for the three class relationships.
+ * - match
+ * - miss
+ * - review
+ *
+ * The scores should always sum to one. If they don't you will be taunted
+ * mercilessly and we'll normalize it anyway. :P
+ */
+exports.matchScore = function(map, e1, e2)
+{
+ var result = { miss: 1.0 };
+
+ if (e1.getStatusString() == e2.getStatusString())
+ {
+ return result;
+ }
+
+ hoot.trace("e1: " + e1.getId() + ", " + e1.getTags().get("name"));
+ if (e1.getTags().get("note"))
+ {
+ hoot.trace("e1 note: " + e1.getTags().get("note"));
+ }
+ hoot.trace("e2: " + e2.getId() + ", " + e2.getTags().get("name"));
+ if (e2.getTags().get("note"))
+ {
+ hoot.trace("e2 note: " + e2.getTags().get("note"));
+ }
+
+ var typeScore = getTypeScore(map, e1, e2);
+ var typeScorePassesThreshold = false;
+ if (typeScore >= exports.tagThreshold)
+ {
+ typeScorePassesThreshold = true;
+ }
+ hoot.trace("typeScore: " + typeScore);
+ hoot.trace("typeScorePassesThreshold: " + typeScorePassesThreshold);
+
+ // extract the sublines needed for matching - Note that this was taken directly from Highway.js.
+ var sublines = sublineMatcher.extractMatchingSublines(map, e1, e2);
+ var distanceScore = -1.0;
+ var weightShapeDistanceScore = -1.0;
+ var lengthScore = -1.0;
+ var geometryMatch = false;
+ if (sublines)
+ {
+ var m = sublines.map;
+ var m1 = sublines.match1;
+ var m2 = sublines.match2;
+ distanceScore = distanceScoreExtractor.extract(m, m1, m2);
+ weightShapeDistanceScore = weightedShapeDistanceExtractor.extract(m, m1, m2);
+ lengthScore = lengthScoreExtractor.extract(m, m1, m2);
+
+ // not sure where this originally came from
+ if ((distanceScore * weightShapeDistanceScore * lengthScore) > 0.4)
+ {
+ geometryMatch = true;
+ }
+ }
+ hoot.trace("distanceScore: " + distanceScore);
+ hoot.trace("weightShapeDistanceScore: " + weightShapeDistanceScore);
+ hoot.trace("lengthScore: " + lengthScore);
+ hoot.trace("geometryMatch: " + geometryMatch);
+
+ var featureMatch = typeScorePassesThreshold && geometryMatch;
+ if (featureMatch)
+ {
+ result = { match: 1.0 };
+ }
+ hoot.trace("featureMatch: " + featureMatch);
+
+ return result;
+};
+
+/**
+ * The internals of geometry merging can become quite complex. Typically this
+ * method will simply call another hoot method to perform the appropriate
+ * merging of geometries.
+ *
+ * If this method is exported then the mergePair method should not be exported.
+ *
+ * @param map The map that is being conflated
+ * @param pairs An array of ElementId pairs that will be merged.
+ * @param replaced An empty array is passed in, the method should fill the array
+ * with all the replacements that occur during the merge process (e.g. if
+ * two elements (way:1 & way:2) are merged into one element (way:3), then
+ * the replaced array should contain [[way:1, way:3], [way:1, way:3]]
+ * where all the "way:*" objects are of the ElementId type.
+ */
+exports.mergeSets = function(map, pairs, replaced)
+{
+ // snap the ways in the second input to the first input. Use the default tag
+ // merge method.
+ var result = snapWays(sublineMatcher, map, pairs, replaced, exports.baseFeatureType);
+ return result;
+};
+
+exports.getMatchFeatureDetails = function(map, e1, e2)
+{
+ var featureDetails = [];
+ return featureDetails;
+};
+