diff --git a/examples/compiled/interactive_geo_earthquakes.vg.json b/examples/compiled/interactive_geo_earthquakes.vg.json
index 24d9a2785a..5e5d0ca1a5 100644
--- a/examples/compiled/interactive_geo_earthquakes.vg.json
+++ b/examples/compiled/interactive_geo_earthquakes.vg.json
@@ -28,7 +28,7 @@
         },
         {
           "type": "filter",
-          "expr": "(rotate0 * -1) - 90 < datum.longitude && datum.longitude < (rotate0 * -1) + 90 && (rotate1 * -1) - 90 < datum.latitude && datum.latitude < (rotate1 * -1) + 90"
+          "expr": "(rotate * -1) - 90 < datum.longitude && datum.longitude < (rotate * -1) + 90"
         },
         {"type": "formula", "expr": "datum.properties.mag", "as": "magnitude"},
         {
@@ -55,17 +55,12 @@
       "size": {"signal": "[width, height]"},
       "fit": {"signal": "[data('source_0'), data('world'), layer_2_geojson_0]"},
       "type": "orthographic",
-      "rotate": {"signal": "[rotate0, rotate1, 0]"}
+      "rotate": {"signal": "[rotate, 0, 0]"}
     }
   ],
   "signals": [
     {
-      "name": "rotate0",
-      "value": 0,
-      "bind": {"input": "range", "min": -90, "max": 90, "step": 1}
-    },
-    {
-      "name": "rotate1",
+      "name": "rotate",
       "value": 0,
       "bind": {"input": "range", "min": -90, "max": 90, "step": 1}
     },
@@ -113,7 +108,7 @@
           "opacity": {"value": 0.25},
           "fill": {"value": "red"},
           "tooltip": {
-            "signal": "{\"magnitude\": isValid(datum[\"magnitude\"]) ? datum[\"magnitude\"] : \"\"+datum[\"magnitude\"]}"
+            "signal": "{\"magnitude\": isValid(datum[\"magnitude\"]) ? datum[\"magnitude\"] : \"\"+datum[\"magnitude\"], \"longitude\": isValid(datum[\"longitude\"]) ? datum[\"longitude\"] : \"\"+datum[\"longitude\"], \"latitude\": isValid(datum[\"latitude\"]) ? datum[\"latitude\"] : \"\"+datum[\"latitude\"]}"
           },
           "ariaRoleDescription": {"value": "circle"},
           "description": {
diff --git a/examples/specs/interactive_geo_earthquakes.vl.json b/examples/specs/interactive_geo_earthquakes.vl.json
index 353f0d333b..b39cfda15f 100644
--- a/examples/specs/interactive_geo_earthquakes.vl.json
+++ b/examples/specs/interactive_geo_earthquakes.vl.json
@@ -4,16 +4,11 @@
   "height": 300,
   "projection": {
     "type": "orthographic",
-    "rotate": {"expr": "[rotate0, rotate1, 0]"}
+    "rotate": {"expr": "[rotate, 0, 0]"}
   },
   "params": [
     {
-      "name": "rotate0",
-      "value": 0,
-      "bind": {"input": "range", "min": -90, "max": 90, "step": 1}
-    },
-    {
-      "name": "rotate1",
+      "name": "rotate",
       "value": 0,
       "bind": {"input": "range", "min": -90, "max": 90, "step": 1}
     },
@@ -46,7 +41,7 @@
         {"calculate": "datum.geometry.coordinates[0]", "as": "longitude"},
         {"calculate": "datum.geometry.coordinates[1]", "as": "latitude"},
         {
-          "filter": "(rotate0 * -1) - 90 < datum.longitude && datum.longitude < (rotate0 * -1) + 90 && (rotate1 * -1) - 90 < datum.latitude && datum.latitude < (rotate1 * -1) + 90"
+          "filter": "(rotate * -1) - 90 < datum.longitude && datum.longitude < (rotate * -1) + 90"
         },
         {"calculate": "datum.properties.mag", "as": "magnitude"}
       ],
@@ -64,8 +59,8 @@
             "range": [0, {"expr": "pow(earthquakeSize, 3)"}]
           }
         },
-        "tooltip": [{"field": "magnitude"}]
+        "tooltip": [{"field": "magnitude"}, {"field": "longitude"}, {"field": "latitude"}]
       }
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/examples/specs/normalized/interactive_geo_earthquakes_normalized.vl.json b/examples/specs/normalized/interactive_geo_earthquakes_normalized.vl.json
index c89a4f247b..38430f107b 100644
--- a/examples/specs/normalized/interactive_geo_earthquakes_normalized.vl.json
+++ b/examples/specs/normalized/interactive_geo_earthquakes_normalized.vl.json
@@ -4,12 +4,7 @@
   "height": 300,
   "params": [
     {
-      "name": "rotate0",
-      "value": 0,
-      "bind": {"input": "range", "min": -90, "max": 90, "step": 1}
-    },
-    {
-      "name": "rotate1",
+      "name": "rotate",
       "value": 0,
       "bind": {"input": "range", "min": -90, "max": 90, "step": 1}
     },
@@ -25,7 +20,7 @@
       "mark": {"type": "geoshape", "fill": "aliceblue"},
       "projection": {
         "type": "orthographic",
-        "rotate": {"expr": "[rotate0, rotate1, 0]"}
+        "rotate": {"expr": "[rotate, 0, 0]"}
       }
     },
     {
@@ -37,7 +32,7 @@
       "mark": {"type": "geoshape", "fill": "mintcream", "stroke": "black"},
       "projection": {
         "type": "orthographic",
-        "rotate": {"expr": "[rotate0, rotate1, 0]"}
+        "rotate": {"expr": "[rotate, 0, 0]"}
       }
     },
     {
@@ -60,19 +55,23 @@
             "range": [0, {"expr": "pow(earthquakeSize, 3)"}]
           }
         },
-        "tooltip": [{"field": "magnitude"}]
+        "tooltip": [
+          {"field": "magnitude"},
+          {"field": "longitude"},
+          {"field": "latitude"}
+        ]
       },
       "transform": [
         {"calculate": "datum.geometry.coordinates[0]", "as": "longitude"},
         {"calculate": "datum.geometry.coordinates[1]", "as": "latitude"},
         {
-          "filter": "(rotate0 * -1) - 90 < datum.longitude && datum.longitude < (rotate0 * -1) + 90 && (rotate1 * -1) - 90 < datum.latitude && datum.latitude < (rotate1 * -1) + 90"
+          "filter": "(rotate * -1) - 90 < datum.longitude && datum.longitude < (rotate * -1) + 90"
         },
         {"calculate": "datum.properties.mag", "as": "magnitude"}
       ],
       "projection": {
         "type": "orthographic",
-        "rotate": {"expr": "[rotate0, rotate1, 0]"}
+        "rotate": {"expr": "[rotate, 0, 0]"}
       }
     }
   ]