diff --git a/core/src/main/scala/com/salesforce/op/stages/impl/feature/GeolocationVectorizer.scala b/core/src/main/scala/com/salesforce/op/stages/impl/feature/GeolocationVectorizer.scala
index 7192842b4b..489f010015 100644
--- a/core/src/main/scala/com/salesforce/op/stages/impl/feature/GeolocationVectorizer.scala
+++ b/core/src/main/scala/com/salesforce/op/stages/impl/feature/GeolocationVectorizer.scala
@@ -139,7 +139,10 @@ final class GeolocationVectorizerModel private[op]
   def transformFn: Seq[Geolocation] => OPVector = row => {
     val replaced =
       if (!trackNulls) {
-        row.zip(fillValues).flatMap { case (r, m) => if (r.isEmpty) m else r.value }
+        row.zip(fillValues).flatMap { case (r, m) =>
+          val meanToUse: Seq[Double] = if (m.isEmpty) RepresentationOfEmpty else m
+          if (r.isEmpty) meanToUse else r.value
+        }
       }
       else {
         row.zip(fillValues).flatMap { case (r, m) =>
diff --git a/core/src/test/scala/com/salesforce/op/stages/impl/feature/AttributeAsserts.scala b/core/src/test/scala/com/salesforce/op/stages/impl/feature/AttributeAsserts.scala
index 8e84d54a5a..0cb29643ab 100644
--- a/core/src/test/scala/com/salesforce/op/stages/impl/feature/AttributeAsserts.scala
+++ b/core/src/test/scala/com/salesforce/op/stages/impl/feature/AttributeAsserts.scala
@@ -37,19 +37,27 @@ import org.scalatest.{Assertion, Matchers}
 
 trait AttributeAsserts {
   self: Matchers =>
+
   /**
    * Assert if attributes are nominal or not
    *
-   * @param schema
+   * @param schema field schema with attributes attached
    * @param expectedNominal Expected array of booleans. True if the field is nominal, false if not.
    * @param output the output OPVector associated with the column
    */
   final def assertNominal(schema: StructField, expectedNominal: Array[Boolean], output: Array[OPVector]): Assertion = {
-    val attributes = AttributeGroup.fromStructField(schema).attributes
     for {
-      x <- output
+      (x, i) <- output.zipWithIndex
+      _ = withClue(s"Output vector $i and expectedNominal arrays are not of the same length:") {
+        x.value.size shouldBe expectedNominal.length
+      }
       (value, nominal) <- x.value.toArray.zip(expectedNominal)
-    } if (nominal) value should (be (0.0) or be (1.0))
-    attributes.map(_.map(_.isNominal).toSeq) shouldBe Some(expectedNominal.toSeq)
+    } if (nominal) value should (be(0.0) or be(1.0))
+
+    val attributes = AttributeGroup.fromStructField(schema).attributes
+    withClue("Field attributes were not set or not as expected:") {
+      attributes.map(_.map(_.isNominal).toSeq) shouldBe Some(expectedNominal.toSeq)
+    }
   }
+
 }
diff --git a/features/src/main/scala/com/salesforce/op/aggregators/Geolocation.scala b/features/src/main/scala/com/salesforce/op/aggregators/Geolocation.scala
index 9b923b4c8d..83bf01f67b 100644
--- a/features/src/main/scala/com/salesforce/op/aggregators/Geolocation.scala
+++ b/features/src/main/scala/com/salesforce/op/aggregators/Geolocation.scala
@@ -78,9 +78,9 @@ case object GeolocationMidpoint
 
 trait GeolocationFunctions {
 
-  val Zero: Array[Double] = Array.fill[Double](4)(0.0)
+  val Zero: Array[Double] = new Array[Double](4)
 
-  def isNone(data: Array[Double]): Boolean = data(3) == 0
+  def isNone(data: Array[Double]): Boolean = data(3) == 0.0
 
   /**
    * Prepare method to be used in the MonoidAggregator for Geolocation objects
@@ -93,7 +93,7 @@ trait GeolocationFunctions {
     if (input.isEmpty) Zero
     else {
       val g = input.toGeoPoint
-      val d = input.accuracy.rangeInUnits / 2
+      val d = input.accuracy.rangeInUnits / 2.0
       Array[Double](
         g.x, g.y, g.z,
         1.0,
diff --git a/features/src/main/scala/com/salesforce/op/features/types/Geolocation.scala b/features/src/main/scala/com/salesforce/op/features/types/Geolocation.scala
index ee171f11dd..225d3a77a2 100644
--- a/features/src/main/scala/com/salesforce/op/features/types/Geolocation.scala
+++ b/features/src/main/scala/com/salesforce/op/features/types/Geolocation.scala
@@ -97,8 +97,8 @@ object Geolocation {
   private[types] def geolocationData(
     lat: Double,
     lon: Double,
-    accuracy: GeolocationAccuracy): Seq[Double] =
-    geolocationData(lat, lon, accuracy.value)
+    accuracy: GeolocationAccuracy
+  ): Seq[Double] = geolocationData(lat, lon, accuracy.value)
 
   private[types] def geolocationData(
     lat: Double,