While Indexing, I am  storing the following fields:

doc.add(new StoredField("latitude", latitude));
doc.add(new StoredField("longitude", longitude));
doc.add(new LatLonPoint("loc", latitude, longitude));

As suggested, I added the following code:
Query latlonQuery = LatLonPoint.newDistanceQuery("loc", minLat, minLng,
50);
Sort s = new Sort(LatLonDocValuesField.newDistanceSort("loc", minLat,
minLng));
TopDocs docs = searcher.search(latlonQuery, 50, s);

But it threw exception:

Exception in thread "main" java.lang.IllegalStateException: unexpected
docvalues type NONE for field 'loc' (expected one of [SORTED_NUMERIC,
NUMERIC]). Re-index with correct docvalues type.
at org.apache.lucene.index.DocValues.checkField(DocValues.java:212)
at org.apache.lucene.index.DocValues.getSortedNumeric(DocValues.java:284)
at
org.apache.lucene.document.LatLonPointDistanceComparator.getLeafComparator(LatLonPointDistanceComparator.java:163)
at
org.apache.lucene.search.FieldValueHitQueue.getComparators(FieldValueHitQueue.java:180)
at
org.apache.lucene.search.TopFieldCollector$SimpleFieldCollector.getLeafCollector(TopFieldCollector.java:100)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:659)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:472)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:591)
at
org.apache.lucene.search.IndexSearcher.searchAfter(IndexSearcher.java:576)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:503)

Question is should I also store LatLonDocValuesField while Indexing?

doc.add(new LatLonDocValuesField("loc", latitude, longitude));
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