diff --git a/src/layer/tile/TileLayer.ts b/src/layer/tile/TileLayer.ts
index fde2e8b634..8bfc426bb9 100644
--- a/src/layer/tile/TileLayer.ts
+++ b/src/layer/tile/TileLayer.ts
@@ -1537,7 +1537,7 @@ export type TileLayerOptionsType = LayerOptionsType & {
     urlTemplate: string | ((...args) => string);
     subdomains?: string[];
     spatialReference?: SpatialReferenceType;
-    tileSize?: number[];
+    tileSize?: number[] | number;
     offset?: number[] | ((...args) => number[]);
     tileSystem?: [number, number, number, number];
     maxAvailableZoom?: number;
diff --git a/src/map/Map.ts b/src/map/Map.ts
index 678c127d3b..9445f983b6 100644
--- a/src/map/Map.ts
+++ b/src/map/Map.ts
@@ -570,7 +570,7 @@ export class Map extends Handlerable(Eventable(Renderable(Class))) {
             this._center = center;
             return this;
         }
-        this._centerZ = center.z || 0;
+        this._centerZ = center.z;
         this.onMoveStart();
         this._setPrjCenter(pcenter);
         this.onMoveEnd(this._parseEventFromCoord(this.getCenter()));
diff --git a/test/map/MapSpec.js b/test/map/MapSpec.js
index 3a05c417cc..2a8f3c76ea 100644
--- a/test/map/MapSpec.js
+++ b/test/map/MapSpec.js
@@ -181,6 +181,7 @@ describe('Map.Spec', function () {
         it('center is changed after setCenter', function () {
             var nc = new maptalks.Coordinate(119, 32).copy();
             map.setCenter(nc);
+            expect(map._centerZ === undefined).to.be.ok();
 
             expect(map.getCenter()).to.closeTo(nc);
         });
@@ -555,7 +556,6 @@ describe('Map.Spec', function () {
             map._getRenderer()._checkSizeInterval = 10;
             // this.timeout(map._getRenderer()._checkSizeInterval * 3);
             var center = map.getCenter();
-            center.z = center.z || 0;
             map.once('resize', function (param) {
                 expect(param).to.be.ok();
                 //center remains
diff --git a/test/map/MapViewHistorySpec.js b/test/map/MapViewHistorySpec.js
index 343c7e12f5..f279ebdef2 100644
--- a/test/map/MapViewHistorySpec.js
+++ b/test/map/MapViewHistorySpec.js
@@ -57,7 +57,7 @@ describe('Map View History', function () {
                 renderer.callInNextFrame(function () {
                     map.zoomToPreviousView();
                     var next = map.zoomToNextView();
-                    expect(next.center).to.be.eql([0, 0, 0]);
+                    expect(next.center).to.be.eql([0, 0]);
                     expect(next.zoom).to.be.eql(zoom - 1);
 
                     expect(map.hasNextView()).not.to.be.ok();
diff --git a/test/map/control/Control.OverviewSpec.js b/test/map/control/Control.OverviewSpec.js
index ac65ded691..a9ea70f302 100644
--- a/test/map/control/Control.OverviewSpec.js
+++ b/test/map/control/Control.OverviewSpec.js
@@ -71,7 +71,7 @@ describe('Control.Overview', function () {
         var overview = new maptalks.control.Overview();
         overview.addTo(map);
         map.on('viewchange', function () {
-            expect(overview._overview.getCenter().toArray()).to.be.eql([0, 0, 0]);
+            expect(overview._overview.getCenter().toArray()).to.be.eql([0, 0]);
             done();
         });
         map.setCenter([0, 0]);
diff --git a/test/map/control/Control.ResetSpec.js b/test/map/control/Control.ResetSpec.js
index 7140e2df42..50992143f8 100644
--- a/test/map/control/Control.ResetSpec.js
+++ b/test/map/control/Control.ResetSpec.js
@@ -37,7 +37,7 @@ describe('Control.Reset', function () {
             happen.click(control._reset);
 
             expect(map.getView()).to.eql({
-                center: [120, 20, 0],
+                center: [120, 20],
                 zoom: 8,
                 bearing: 10,
                 pitch: 30
@@ -51,7 +51,7 @@ describe('Control.Reset', function () {
             happen.click(control._reset);
 
             expect(map.getView()).to.eql({
-                center: [118, 32, 0],
+                center: [118, 32],
                 zoom: 5,
                 bearing: 0,
                 pitch: 0