major refactor and improvements

1 files changed, 0 insertions, 64 deletions

diff --git a/cluster.js b/cluster.js
deleted file mode 100644
index c716063..0000000
--- a/cluster.js
+++ /dev/null
@@ -1,64 +0,0 @@
-const CheapRuler = require('cheap-ruler')
-const ruler = new CheapRuler(-37, 'meters')
-
-/**
- * Cluster points together where within threshold distance.
- *
- * @param {Array} features - GeoJSON Point Features
- * @param {number} thresholdDistance - Maximum distance between points to cluster together
- *
- * @returns {Array} clusters, where unclustered features are returned as single feature clusters
- */
-module.exports = (features, thresholdDistance) => {
-  // Array of clusters where each cluster is a Set of feature index's
-  const clusters = []
-
-  features.map((a, ai) => {
-    features.map((b, bi) => {
-      // skip comparing with self
-      if (ai === bi) return
-
-      const distance = ruler.distance(a.geometry.coordinates, b.geometry.coordinates)                                                        
-      if (distance < thresholdDistance) {
-        // link into a cluster
-        let addedToExistingCluster = false
-        clusters.forEach((cluster, i) => {
-          if (cluster.has(ai) || cluster.has(bi)) {
-            // insert into this cluster
-            clusters[i].add(ai)
-            clusters[i].add(bi)
-
-            addedToExistingCluster = true
-          }
-        })
-
-        if (!addedToExistingCluster) {
-          // create a new cluster
-          const newCluster = new Set()
-          newCluster.add(ai)
-          newCluster.add(bi)
-          clusters.push(newCluster)
-        }
-      } // else don't cluster together
-    })
-  })
-
-  // result is array of clusters, including non-clustered features as single item clusters
-  const result = clusters.map(cluster => {
-    return Array.from(cluster).map(index => {
-      return features[index]
-    })
-  })
-
-  // find features not clustered
-  features.map((feature, index) => {
-    // if feature not a cluster, return as an single item cluster
-    const featureInACluster = clusters.map(cluster => cluster.has(index)).reduce((acc, cur) => acc || !!cur, false)
-    if (!featureInACluster) {
-      result.push([feature])
-    }
-  })
-
-  return result
-
-}