diff --git a/build/pbf2json.darwin-x64 b/build/pbf2json.darwin-x64
index d86fd04..54acb16 100755
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diff --git a/build/pbf2json.linux-arm b/build/pbf2json.linux-arm
index 2e4d91a..57bb05e 100755
Binary files a/build/pbf2json.linux-arm and b/build/pbf2json.linux-arm differ
diff --git a/build/pbf2json.linux-x64 b/build/pbf2json.linux-x64
index efb0416..d45f649 100755
Binary files a/build/pbf2json.linux-x64 and b/build/pbf2json.linux-x64 differ
diff --git a/build/pbf2json.win32-x64 b/build/pbf2json.win32-x64
index 9dddb53..6ffd202 100755
Binary files a/build/pbf2json.win32-x64 and b/build/pbf2json.win32-x64 differ
diff --git a/cache.go b/cache.go
new file mode 100644
index 0000000..e36f621
--- /dev/null
+++ b/cache.go
@@ -0,0 +1,87 @@
+package main
+
+import (
+	"github.com/qedus/osmpbf"
+	"github.com/syndtr/goleveldb/leveldb"
+	"github.com/syndtr/goleveldb/leveldb/opt"
+	"log"
+	"strconv"
+)
+
+// queue a leveldb write in a batch
+func cacheQueueNode(batch *leveldb.Batch, node *osmpbf.Node) {
+	id, val := nodeToBytes(node)
+	batch.Put([]byte(id), []byte(val))
+}
+
+// queue a leveldb write in a batch
+func cacheQueueWay(batch *leveldb.Batch, way *osmpbf.Way) {
+	id, val := wayToBytes(way)
+	batch.Put([]byte(id), []byte(val))
+}
+
+// flush a leveldb batch to database and reset batch to 0
+func cacheFlush(db *leveldb.DB, batch *leveldb.Batch, sync bool) {
+	var writeOpts = &opt.WriteOptions{
+		NoWriteMerge: true,
+		Sync:         sync,
+	}
+
+	err := db.Write(batch, writeOpts)
+	if err != nil {
+		log.Fatal(err)
+	}
+	batch.Reset()
+}
+
+func cacheLookupNodeByID(db *leveldb.DB, id int64) (map[string]string, error) {
+	stringid := strconv.FormatInt(id, 10)
+
+	data, err := db.Get([]byte(stringid), nil)
+	if err != nil {
+		log.Println("[warn] fetch failed for node ID:", stringid)
+		return make(map[string]string, 0), err
+	}
+
+	return bytesToLatLon(data), nil
+}
+
+func cacheLookupNodes(db *leveldb.DB, way *osmpbf.Way) ([]map[string]string, error) {
+
+	var container []map[string]string
+
+	for _, each := range way.NodeIDs {
+		stringid := strconv.FormatInt(each, 10)
+
+		data, err := db.Get([]byte(stringid), nil)
+		if err != nil {
+			log.Println("[warn] denormalize failed for way:", way.ID, "node not found:", stringid)
+			return make([]map[string]string, 0), err
+		}
+
+		container = append(container, bytesToLatLon(data))
+	}
+
+	return container, nil
+}
+
+func cacheLookupWayNodes(db *leveldb.DB, wayid int64) ([]map[string]string, error) {
+
+	// prefix the key with 'W' to differentiate it from node ids
+	stringid := "W" + strconv.FormatInt(wayid, 10)
+
+	// look up way bytes
+	reldata, err := db.Get([]byte(stringid), nil)
+	if err != nil {
+		log.Println("[warn] lookup failed for way:", wayid, "noderefs not found:", stringid)
+		return make([]map[string]string, 0), err
+	}
+
+	// generate a way object
+	var way = &osmpbf.Way{
+		ID:      wayid,
+		NodeIDs: bytesToIDSlice(reldata),
+	}
+
+	return cacheLookupNodes(db, way)
+}
diff --git a/pbf2json.go b/pbf2json.go
index a09f2ee..b06533c 100644
--- a/pbf2json.go
+++ b/pbf2json.go
@@ -16,7 +16,6 @@ import (
 	geo "github.com/paulmach/go.geo"
 	"github.com/qedus/osmpbf"
 	"github.com/syndtr/goleveldb/leveldb"
-	"github.com/syndtr/goleveldb/leveldb/opt"
 )
 
 type settings struct {
@@ -495,84 +494,6 @@ func isWheelchairAccessibleNode(node *osmpbf.Node) uint8 {
 	return 0
 }
 
-// queue a leveldb write in a batch
-func cacheQueueNode(batch *leveldb.Batch, node *osmpbf.Node) {
-	id, val := nodeToBytes(node)
-	batch.Put([]byte(id), []byte(val))
-}
-
-// queue a leveldb write in a batch
-func cacheQueueWay(batch *leveldb.Batch, way *osmpbf.Way) {
-	id, val := wayToBytes(way)
-	batch.Put([]byte(id), []byte(val))
-}
-
-// flush a leveldb batch to database and reset batch to 0
-func cacheFlush(db *leveldb.DB, batch *leveldb.Batch, sync bool) {
-	var writeOpts = &opt.WriteOptions{
-		NoWriteMerge: true,
-		Sync:         sync,
-	}
-
-	err := db.Write(batch, writeOpts)
-	if err != nil {
-		log.Fatal(err)
-	}
-	batch.Reset()
-}
-
-func cacheLookupNodeByID(db *leveldb.DB, id int64) (map[string]string, error) {
-	stringid := strconv.FormatInt(id, 10)
-
-	data, err := db.Get([]byte(stringid), nil)
-	if err != nil {
-		log.Println("[warn] fetch failed for node ID:", stringid)
-		return make(map[string]string, 0), err
-	}
-
-	return bytesToLatLon(data), nil
-}
-
-func cacheLookupNodes(db *leveldb.DB, way *osmpbf.Way) ([]map[string]string, error) {
-
-	var container []map[string]string
-
-	for _, each := range way.NodeIDs {
-		stringid := strconv.FormatInt(each, 10)
-
-		data, err := db.Get([]byte(stringid), nil)
-		if err != nil {
-			log.Println("[warn] denormalize failed for way:", way.ID, "node not found:", stringid)
-			return make([]map[string]string, 0), err
-		}
-
-		container = append(container, bytesToLatLon(data))
-	}
-
-	return container, nil
-}
-
-func cacheLookupWayNodes(db *leveldb.DB, wayid int64) ([]map[string]string, error) {
-
-	// prefix the key with 'W' to differentiate it from node ids
-	stringid := "W" + strconv.FormatInt(wayid, 10)
-
-	// look up way bytes
-	reldata, err := db.Get([]byte(stringid), nil)
-	if err != nil {
-		log.Println("[warn] lookup failed for way:", wayid, "noderefs not found:", stringid)
-		return make([]map[string]string, 0), err
-	}
-
-	// generate a way object
-	var way = &osmpbf.Way{
-		ID:      wayid,
-		NodeIDs: bytesToIDSlice(reldata),
-	}
-
-	return cacheLookupNodes(db, way)
-}
-
 // decode bytes to a 'latlon' type object
 func bytesToLatLon(data []byte) map[string]string {
 	buf := make([]byte, 8)