diff --git a/src/ol/Collection.js b/src/ol/Collection.js
index 6c15953019..ca2f80e5ad 100644
--- a/src/ol/Collection.js
+++ b/src/ol/Collection.js
@@ -56,6 +56,7 @@ export class CollectionEvent extends Event {
  * Collection; they trigger events on the appropriate object, not on the
  * Collection as a whole.
  *
+ * @template T
  * @api
  */
 class Collection extends BaseObject {
@@ -63,7 +64,6 @@ class Collection extends BaseObject {
   /**
    * @param {Array.<T>=} opt_array Array.
    * @param {module:ol/Collection~Options=} opt_options Collection options.
-   * @template T
    */
   constructor(opt_array, opt_options) {
 
diff --git a/src/ol/Geolocation.js b/src/ol/Geolocation.js
index 5f72759677..b096a10b44 100644
--- a/src/ol/Geolocation.js
+++ b/src/ol/Geolocation.js
@@ -15,7 +15,7 @@ import {get as getProjection, getTransformFromProjections, identityTransform} fr
  * @typedef {Object} Options
  * @property {boolean} [tracking=false] Start Tracking right after
  * instantiation.
- * @property {GeolocationPositionOptions} [trackingOptions] Tracking options.
+ * @property {PositionOptions} [trackingOptions] Tracking options.
  * See {@link http://www.w3.org/TR/geolocation-API/#position_options_interface}.
  * @property {module:ol/proj~ProjectionLike} [projection] The projection the position
  * is reported in.
@@ -135,7 +135,7 @@ class Geolocation extends BaseObject {
 
   /**
    * @private
-   * @param {GeolocationPosition} position position event.
+   * @param {Position} position position event.
    */
   positionChange_(position) {
     const coords = position.coords;
@@ -171,7 +171,7 @@ class Geolocation extends BaseObject {
 
   /**
    * @private
-   * @param {GeolocationPositionError} error error object.
+   * @param {PositionError} error error object.
    */
   positionError_(error) {
     error.type = EventType.ERROR;
@@ -286,14 +286,14 @@ class Geolocation extends BaseObject {
   /**
    * Get the tracking options.
    * @see http://www.w3.org/TR/geolocation-API/#position-options
-   * @return {GeolocationPositionOptions|undefined} PositionOptions as defined by
+   * @return {PositionOptions|undefined} PositionOptions as defined by
    *     the [HTML5 Geolocation spec
    *     ](http://www.w3.org/TR/geolocation-API/#position_options_interface).
    * @observable
    * @api
    */
   getTrackingOptions() {
-    return /** @type {GeolocationPositionOptions|undefined} */ (this.get(GeolocationProperty.TRACKING_OPTIONS));
+    return /** @type {PositionOptions|undefined} */ (this.get(GeolocationProperty.TRACKING_OPTIONS));
   }
 
   /**
@@ -320,7 +320,7 @@ class Geolocation extends BaseObject {
   /**
    * Set the tracking options.
    * @see http://www.w3.org/TR/geolocation-API/#position-options
-   * @param {GeolocationPositionOptions} options PositionOptions as defined by the
+   * @param {PositionOptions} options PositionOptions as defined by the
    *     [HTML5 Geolocation spec
    *     ](http://www.w3.org/TR/geolocation-API/#position_options_interface).
    * @observable
diff --git a/src/ol/View.js b/src/ol/View.js
index dfdf355f97..d635ac73a6 100644
--- a/src/ol/View.js
+++ b/src/ol/View.js
@@ -33,7 +33,7 @@ import Units from './proj/Units.js';
  * @property {number} [sourceResolution]
  * @property {number} [targetResolution]
  * @property {number} [sourceRotation]
- * @property {number} [sourceRotation]
+ * @property {number} [targetRotation]
  * @property {module:ol/coordinate~Coordinate} [anchor]
  * @property {number} start
  * @property {number} duration
diff --git a/src/ol/control/Attribution.js b/src/ol/control/Attribution.js
index 57d4d8922e..9b610883b1 100644
--- a/src/ol/control/Attribution.js
+++ b/src/ol/control/Attribution.js
@@ -13,7 +13,7 @@ import {visibleAtResolution} from '../layer/Layer.js';
 /**
  * @typedef {Object} Options
  * @property {string} [className='ol-attribution'] CSS class name.
- * @property {Element|string} [target] Specify a target if you
+ * @property {HTMLElement|string} [target] Specify a target if you
  * want the control to be rendered outside of the map's
  * viewport.
  * @property {boolean} [collapsible=true] Specify if attributions can
@@ -25,7 +25,7 @@ import {visibleAtResolution} from '../layer/Layer.js';
  * @property {string} [label='i'] Text label to use for the
  * collapsed attributions button.
  * Instead of text, also an element (e.g. a `span` element) can be used.
- * @property {string|Element} [collapseLabel='»'] Text label to use
+ * @property {string|HTMLElement} [collapseLabel='»'] Text label to use
  * for the expanded attributions button.
  * Instead of text, also an element (e.g. a `span` element) can be used.
  * @property {function(module:ol/MapEvent)} [render] Function called when
@@ -60,7 +60,7 @@ class Attribution extends Control {
 
     /**
      * @private
-     * @type {Element}
+     * @type {HTMLElement}
      */
     this.ulElement_ = document.createElement('UL');
 
@@ -90,7 +90,7 @@ class Attribution extends Control {
     if (typeof collapseLabel === 'string') {
       /**
        * @private
-       * @type {Element}
+       * @type {HTMLElement}
        */
       this.collapseLabel_ = document.createElement('span');
       this.collapseLabel_.textContent = collapseLabel;
@@ -103,7 +103,7 @@ class Attribution extends Control {
     if (typeof label === 'string') {
       /**
        * @private
-       * @type {Element}
+       * @type {HTMLElement}
        */
       this.label_ = document.createElement('span');
       this.label_.textContent = label;
diff --git a/src/ol/control/Control.js b/src/ol/control/Control.js
index ebeea4f3e0..873779a2c4 100644
--- a/src/ol/control/Control.js
+++ b/src/ol/control/Control.js
@@ -10,13 +10,13 @@ import {listen, unlistenByKey} from '../events.js';
 
 /**
  * @typedef {Object} Options
- * @property {Element} [element] The element is the control's
+ * @property {HTMLElement} [element] The element is the control's
  * container element. This only needs to be specified if you're developing
  * a custom control.
  * @property {function(module:ol/MapEvent)} [render] Function called when
  * the control should be re-rendered. This is called in a `requestAnimationFrame`
  * callback.
- * @property {Element|string} [target] Specify a target if you want
+ * @property {HTMLElement|string} [target] Specify a target if you want
  * the control to be rendered outside of the map's viewport.
  */
 
@@ -56,13 +56,13 @@ class Control extends BaseObject {
 
     /**
      * @protected
-     * @type {Element}
+     * @type {HTMLElement}
      */
     this.element = options.element ? options.element : null;
 
     /**
      * @private
-     * @type {Element}
+     * @type {HTMLElement}
      */
     this.target_ = null;
 
@@ -140,7 +140,7 @@ class Control extends BaseObject {
    * after `setMap` is called on the control). If no `target` is set in the
    * options passed to the control constructor and if `setTarget` is not called
    * then the control is added to the map's overlay container.
-   * @param {Element|string} target Target.
+   * @param {HTMLElement|string} target Target.
    * @api
    */
   setTarget(target) {
diff --git a/src/ol/control/FullScreen.js b/src/ol/control/FullScreen.js
index 15ce93e7bc..9de77ff1c6 100644
--- a/src/ol/control/FullScreen.js
+++ b/src/ol/control/FullScreen.js
@@ -34,16 +34,16 @@ const getChangeType = (function() {
 /**
  * @typedef {Object} Options
  * @property {string} [className='ol-full-screen'] CSS class name.
- * @property {string|Element} [label='\u2922'] Text label to use for the button.
+ * @property {string|HTMLElement} [label='\u2922'] Text label to use for the button.
  * Instead of text, also an element (e.g. a `span` element) can be used.
- * @property {string|Element} [labelActive='\u00d7'] Text label to use for the
+ * @property {string|HTMLElement} [labelActive='\u00d7'] Text label to use for the
  * button when full-screen is active.
  * Instead of text, also an element (e.g. a `span` element) can be used.
  * @property {string} [tipLabel='Toggle full-screen'] Text label to use for the button tip.
  * @property {boolean} [keys=false] Full keyboard access.
- * @property {Element|string} [target] Specify a target if you want the
+ * @property {HTMLElement|string} [target] Specify a target if you want the
  * control to be rendered outside of the map's viewport.
- * @property {Element|string} [source] The element to be displayed
+ * @property {HTMLElement|string} [source] The element to be displayed
  * fullscreen. When not provided, the element containing the map viewport will
  * be displayed fullscreen.
  */
@@ -87,7 +87,7 @@ class FullScreen extends Control {
 
     /**
      * @private
-     * @type {Element}
+     * @type {HTMLElement}
      */
     this.labelNode_ = typeof label === 'string' ?
       document.createTextNode(label) : label;
@@ -96,7 +96,7 @@ class FullScreen extends Control {
 
     /**
      * @private
-     * @type {Element}
+     * @type {HTMLElement}
      */
     this.labelActiveNode_ = typeof labelActive === 'string' ?
       document.createTextNode(labelActive) : labelActive;
@@ -126,7 +126,7 @@ class FullScreen extends Control {
 
     /**
      * @private
-     * @type {Element|string|undefined}
+     * @type {HTMLElement|string|undefined}
      */
     this.source_ = options.source;
 
@@ -231,7 +231,7 @@ function isFullScreen() {
 
 /**
  * Request to fullscreen an element.
- * @param {Element} element Element to request fullscreen
+ * @param {HTMLElement} element Element to request fullscreen
  */
 function requestFullScreen(element) {
   if (element.requestFullscreen) {
@@ -247,7 +247,7 @@ function requestFullScreen(element) {
 
 /**
  * Request to fullscreen an element with keyboard input.
- * @param {Element} element Element to request fullscreen
+ * @param {HTMLElement} element Element to request fullscreen
  */
 function requestFullScreenWithKeys(element) {
   if (element.mozRequestFullScreenWithKeys) {
diff --git a/src/ol/control/OverviewMap.js b/src/ol/control/OverviewMap.js
index 435fd4d4cc..8e9379cb4f 100644
--- a/src/ol/control/OverviewMap.js
+++ b/src/ol/control/OverviewMap.js
@@ -39,17 +39,17 @@ const MIN_RATIO = 0.1;
  * @typedef {Object} Options
  * @property {string} [className='ol-overviewmap'] CSS class name.
  * @property {boolean} [collapsed=true] Whether the control should start collapsed or not (expanded).
- * @property {string|Element} [collapseLabel='«'] Text label to use for the
+ * @property {string|HTMLElement} [collapseLabel='«'] Text label to use for the
  * expanded overviewmap button. Instead of text, also an element (e.g. a `span` element) can be used.
  * @property {boolean} [collapsible=true] Whether the control can be collapsed or not.
- * @property {string|Element} [label='»'] Text label to use for the collapsed
+ * @property {string|HTMLElement} [label='»'] Text label to use for the collapsed
  * overviewmap button. Instead of text, also an element (e.g. a `span` element) can be used.
  * @property {Array.<module:ol/layer/Layer>|module:ol/Collection.<module:ol/layer/Layer>} [layers]
  * Layers for the overview map. If not set, then all main map layers are used
  * instead.
  * @property {function(module:ol/MapEvent)} [render] Function called when the control
  * should be re-rendered. This is called in a `requestAnimationFrame` callback.
- * @property {Element|string} [target] Specify a target if you want the control
+ * @property {HTMLElement|string} [target] Specify a target if you want the control
  * to be rendered outside of the map's viewport.
  * @property {string} [tipLabel='Overview map'] Text label to use for the button tip.
  * @property {module:ol/View} [view] Custom view for the overview map. If not provided,
@@ -104,7 +104,7 @@ class OverviewMap extends Control {
     if (typeof collapseLabel === 'string') {
       /**
        * @private
-       * @type {Element}
+       * @type {HTMLElement}
        */
       this.collapseLabel_ = document.createElement('span');
       this.collapseLabel_.textContent = collapseLabel;
@@ -118,7 +118,7 @@ class OverviewMap extends Control {
     if (typeof label === 'string') {
       /**
        * @private
-       * @type {Element}
+       * @type {HTMLElement}
        */
       this.label_ = document.createElement('span');
       this.label_.textContent = label;
@@ -137,7 +137,7 @@ class OverviewMap extends Control {
       this.handleClick_, this);
 
     /**
-     * @type {Element}
+     * @type {HTMLElement}
      * @private
      */
     this.ovmapDiv_ = document.createElement('DIV');
diff --git a/src/ol/control/Rotate.js b/src/ol/control/Rotate.js
index 6b364daa66..cccff5dfa9 100644
--- a/src/ol/control/Rotate.js
+++ b/src/ol/control/Rotate.js
@@ -11,7 +11,7 @@ import EventType from '../events/EventType.js';
 /**
  * @typedef {Object} Options
  * @property {string} [className='ol-rotate'] CSS class name.
- * @property {string|Element} [label='⇧'] Text label to use for the rotate button.
+ * @property {string|HTMLElement} [label='⇧'] Text label to use for the rotate button.
  * Instead of text, also an element (e.g. a `span` element) can be used.
  * @property {string} [tipLabel='Reset rotation'] Text label to use for the rotate tip.
  * @property {number} [duration=250] Animation duration in milliseconds.
@@ -20,7 +20,7 @@ import EventType from '../events/EventType.js';
  * be re-rendered. This is called in a `requestAnimationFrame` callback.
  * @property {function()} [resetNorth] Function called when the control is clicked.
  * This will override the default `resetNorth`.
- * @property {Element|string} [target] Specify a target if you want the control to be
+ * @property {HTMLElement|string} [target] Specify a target if you want the control to be
  * rendered outside of the map's viewport.
  */
 
@@ -53,7 +53,7 @@ class Rotate extends Control {
     const label = options.label !== undefined ? options.label : '\u21E7';
 
     /**
-     * @type {Element}
+     * @type {HTMLElement}
      * @private
      */
     this.label_ = null;
diff --git a/src/ol/control/ScaleLine.js b/src/ol/control/ScaleLine.js
index c854920cfd..ffb86aca12 100644
--- a/src/ol/control/ScaleLine.js
+++ b/src/ol/control/ScaleLine.js
@@ -42,7 +42,7 @@ const LEADING_DIGITS = [1, 2, 5];
  * @property {number} [minWidth=64] Minimum width in pixels.
  * @property {function(module:ol/MapEvent)} [render] Function called when the control
  * should be re-rendered. This is called in a `requestAnimationFrame` callback.
- * @property {Element|string} [target] Specify a target if you want the control
+ * @property {HTMLElement|string} [target] Specify a target if you want the control
  * to be rendered outside of the map's viewport.
  * @property {module:ol/control/ScaleLine~Units|string} [units='metric'] Units.
  */
diff --git a/src/ol/control/Zoom.js b/src/ol/control/Zoom.js
index b6a0cc1fb1..011e1959fb 100644
--- a/src/ol/control/Zoom.js
+++ b/src/ol/control/Zoom.js
@@ -12,14 +12,14 @@ import {easeOut} from '../easing.js';
  * @typedef {Object} Options
  * @property {number} [duration=250] Animation duration in milliseconds.
  * @property {string} [className='ol-zoom'] CSS class name.
- * @property {string|Element} [zoomInLabel='+'] Text label to use for the zoom-in
+ * @property {string|HTMLElement} [zoomInLabel='+'] Text label to use for the zoom-in
  * button. Instead of text, also an element (e.g. a `span` element) can be used.
- * @property {string|Element} [zoomOutLabel='-'] Text label to use for the zoom-out button.
+ * @property {string|HTMLElement} [zoomOutLabel='-'] Text label to use for the zoom-out button.
  * Instead of text, also an element (e.g. a `span` element) can be used.
  * @property {string} [zoomInTipLabel='Zoom in'] Text label to use for the button tip.
  * @property {string} [zoomOutTipLabel='Zoom out'] Text label to use for the button tip.
  * @property {number} [delta=1] The zoom delta applied on each click.
- * @property {Element|string} [target] Specify a target if you want the control to be
+ * @property {HTMLElement|string} [target] Specify a target if you want the control to be
  * rendered outside of the map's viewport.
  */
 
diff --git a/src/ol/control/ZoomSlider.js b/src/ol/control/ZoomSlider.js
index e2369689c2..3ad70d7724 100644
--- a/src/ol/control/ZoomSlider.js
+++ b/src/ol/control/ZoomSlider.js
@@ -180,7 +180,7 @@ class ZoomSlider extends Control {
       width: container.offsetWidth, height: container.offsetHeight
     };
 
-    const thumb = container.firstElementChild;
+    const thumb = /** @type {HTMLElement} */ (container.firstElementChild);
     const computedStyle = getComputedStyle(thumb);
     const thumbWidth = thumb.offsetWidth +
         parseFloat(computedStyle['marginRight']) +
@@ -242,7 +242,7 @@ class ZoomSlider extends Control {
    */
   handleDraggerDrag_(event) {
     if (this.dragging_) {
-      const element = this.element.firstElementChild;
+      const element = /** @type {HTMLElement} */ (this.element.firstElementChild);
       const deltaX = event.clientX - this.previousX_ + parseInt(element.style.left, 10);
       const deltaY = event.clientY - this.previousY_ + parseInt(element.style.top, 10);
       const relativePosition = this.getRelativePosition_(deltaX, deltaY);
@@ -284,7 +284,7 @@ class ZoomSlider extends Control {
    */
   setThumbPosition_(res) {
     const position = this.getPositionForResolution_(res);
-    const thumb = this.element.firstElementChild;
+    const thumb = /** @type {HTMLElement} */ (this.element.firstElementChild);
 
     if (this.direction_ == Direction.HORIZONTAL) {
       thumb.style.left = this.widthLimit_ * position + 'px';
diff --git a/src/ol/control/ZoomToExtent.js b/src/ol/control/ZoomToExtent.js
index 22a4e659dd..113f7682ee 100644
--- a/src/ol/control/ZoomToExtent.js
+++ b/src/ol/control/ZoomToExtent.js
@@ -10,9 +10,9 @@ import {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';
 /**
  * @typedef {Object} Options
  * @property {string} [className='ol-zoom-extent'] Class name.
- * @property {Element|string} [target] Specify a target if you want the control
+ * @property {HTMLElement|string} [target] Specify a target if you want the control
  * to be rendered outside of the map's viewport.
- * @property {string|Element} [label='E'] Text label to use for the button.
+ * @property {string|HTMLElement} [label='E'] Text label to use for the button.
  * Instead of text, also an element (e.g. a `span` element) can be used.
  * @property {string} [tipLabel='Fit to extent'] Text label to use for the button tip.
  * @property {module:ol/extent~Extent} [extent] The extent to zoom to. If undefined the validity
diff --git a/src/ol/source/Stamen.js b/src/ol/source/Stamen.js
index 20447bffda..3928e59992 100644
--- a/src/ol/source/Stamen.js
+++ b/src/ol/source/Stamen.js
@@ -95,7 +95,7 @@ const ProviderConfig = {
  * @property {number} [minZoom] Minimum zoom.
  * @property {number} [maxZoom] Maximum zoom.
  * @property {boolean} [opaque] Whether the layer is opaque.
- * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
+ * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
  * Higher values can increase reprojection performance, but decrease precision.
  * @property {module:ol/Tile~LoadFunction} [tileLoadFunction]
  * Optional function to load a tile given a URL. The default is
diff --git a/src/ol/source/TileImage.js b/src/ol/source/TileImage.js
index 8ac058026a..369c2dfd42 100644
--- a/src/ol/source/TileImage.js
+++ b/src/ol/source/TileImage.js
@@ -24,7 +24,7 @@ import {getForProjection as getTileGridForProjection} from '../tilegrid.js';
  * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.
  * @property {boolean} [opaque=true] Whether the layer is opaque.
  * @property {module:ol/proj~ProjectionLike} projection Projection.
- * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
+ * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
  * Higher values can increase reprojection performance, but decrease precision.
  * @property {module:ol/source/State} [state] Source state.
  * @property {module:ol/ImageTile~TileClass} [tileClass] Class used to instantiate image tiles.
diff --git a/src/ol/source/TileJSON.js b/src/ol/source/TileJSON.js
index 2013e81079..28302b1d78 100644
--- a/src/ol/source/TileJSON.js
+++ b/src/ol/source/TileJSON.js
@@ -27,7 +27,7 @@ import {createXYZ, extentFromProjection} from '../tilegrid.js';
  * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.
  * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.
  * Useful when the server does not support CORS..
- * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
+ * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
  * Higher values can increase reprojection performance, but decrease precision.
  * @property {tileJSON} [tileJSON] TileJSON configuration for this source.
  * If not provided, `url` must be configured.
diff --git a/src/ol/source/TileWMS.js b/src/ol/source/TileWMS.js
index 13add52b03..9586c9bc0c 100644
--- a/src/ol/source/TileWMS.js
+++ b/src/ol/source/TileWMS.js
@@ -41,7 +41,7 @@ import {appendParams} from '../uri.js';
  * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting
  * the image from the remote server.
  * @property {module:ol/proj~ProjectionLike} projection Projection.
- * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
+ * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
  * Higher values can increase reprojection performance, but decrease precision.
  * @property {module:ol/ImageTile~TileClass} [tileClass] Class used to instantiate image tiles.
  * Default is {@link module:ol/ImageTile~TileClass}.
diff --git a/src/ol/source/WMTS.js b/src/ol/source/WMTS.js
index 0ec7a21a15..38c6d86678 100644
--- a/src/ol/source/WMTS.js
+++ b/src/ol/source/WMTS.js
@@ -22,7 +22,7 @@ import {appendParams} from '../uri.js';
  * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.
  * @property {module:ol/tilegrid/WMTS} tileGrid Tile grid.
  * @property {module:ol/proj~ProjectionLike} projection Projection.
- * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
+ * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
  * Higher values can increase reprojection performance, but decrease precision.
  * @property {module:ol/source/WMTSRequestEncoding|string} [requestEncoding='KVP'] Request encoding.
  * @property {string} layer Layer name as advertised in the WMTS capabilities.
diff --git a/src/ol/source/XYZ.js b/src/ol/source/XYZ.js
index ddabfaf5cf..ecc49e81ab 100644
--- a/src/ol/source/XYZ.js
+++ b/src/ol/source/XYZ.js
@@ -15,7 +15,7 @@ import {createXYZ, extentFromProjection} from '../tilegrid.js';
  * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.
  * @property {boolean} [opaque=true] Whether the layer is opaque.
  * @property {module:ol/proj~ProjectionLike} [projection='EPSG:3857'] Projection.
- * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
+ * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
  * Higher values can increase reprojection performance, but decrease precision.
  * @property {number} [maxZoom=18] Optional max zoom level.
  * @property {number} [minZoom=0] Optional min zoom level.
diff --git a/src/ol/source/Zoomify.js b/src/ol/source/Zoomify.js
index b6f58be100..3b83cfeb0a 100644
--- a/src/ol/source/Zoomify.js
+++ b/src/ol/source/Zoomify.js
@@ -89,7 +89,7 @@ CustomTile.prototype.getImage = function() {
  * access pixel data with the Canvas renderer.  See
  * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.
  * @property {module:ol/proj~ProjectionLike} [projection] Projection.
- * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
+ * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).
  * Higher values can increase reprojection performance, but decrease precision.
  * @property {string} [url] URL template or base URL of the Zoomify service.
  * A base URL is the fixed part
diff --git a/src/ol/structs/LRUCache.js b/src/ol/structs/LRUCache.js
index edec88d778..a9e68ac268 100644
--- a/src/ol/structs/LRUCache.js
+++ b/src/ol/structs/LRUCache.js
@@ -16,15 +16,17 @@ import EventType from '../events/EventType.js';
  */
 
 
+/**
+ * Implements a Least-Recently-Used cache where the keys do not conflict with
+ * Object's properties (e.g. 'hasOwnProperty' is not allowed as a key). Expiring
+ * items from the cache is the responsibility of the user.
+ *
+ * @fires module:ol/events/Event~Event
+ * @template T
+ */
 class LRUCache extends EventTarget {
 
   /**
-   * Implements a Least-Recently-Used cache where the keys do not conflict with
-   * Object's properties (e.g. 'hasOwnProperty' is not allowed as a key). Expiring
-   * items from the cache is the responsibility of the user.
-   *
-   * @fires module:ol/events/Event~Event
-   * @template T
    * @param {number=} opt_highWaterMark High water mark.
    */
   constructor(opt_highWaterMark) {
diff --git a/src/ol/structs/PriorityQueue.js b/src/ol/structs/PriorityQueue.js
index c78cb3b3dc..c82eb12a77 100644
--- a/src/ol/structs/PriorityQueue.js
+++ b/src/ol/structs/PriorityQueue.js
@@ -11,19 +11,22 @@ import {clear} from '../obj.js';
 export const DROP = Infinity;
 
 
+/**
+ * Priority queue.
+ *
+ * The implementation is inspired from the Closure Library's Heap class and
+ * Python's heapq module.
+ *
+ * @see http://closure-library.googlecode.com/svn/docs/closure_goog_structs_heap.js.source.html
+ * @see http://hg.python.org/cpython/file/2.7/Lib/heapq.py
+ *
+ * @template T
+ */
 class PriorityQueue {
+
   /**
-   * Priority queue.
-   *
-   * The implementation is inspired from the Closure Library's Heap class and
-   * Python's heapq module.
-   *
-   * @see http://closure-library.googlecode.com/svn/docs/closure_goog_structs_heap.js.source.html
-   * @see http://hg.python.org/cpython/file/2.7/Lib/heapq.py
-   *
    * @param {function(T): number} priorityFunction Priority function.
    * @param {function(T): string} keyFunction Key function.
-   * @template T
    */
   constructor(priorityFunction, keyFunction) {
 
diff --git a/src/ol/structs/RBush.js b/src/ol/structs/RBush.js
index 1039171e97..3221b85086 100644
--- a/src/ol/structs/RBush.js
+++ b/src/ol/structs/RBush.js
@@ -15,14 +15,16 @@ import {isEmpty} from '../obj.js';
  * @property {Object} [value]
  */
 
+/**
+ * Wrapper around the RBush by Vladimir Agafonkin.
+ *
+ * @see https://github.com/mourner/rbush
+ * @template T
+ */
 class RBush {
 
   /**
-   * Wrapper around the RBush by Vladimir Agafonkin.
-   *
    * @param {number=} opt_maxEntries Max entries.
-   * @see https://github.com/mourner/rbush
-   * @template T
    */
   constructor(opt_maxEntries) {