diff --git a/README.md b/README.md
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@@ -238,8 +238,8 @@ ReactDOM.render(
 | <b>heatmapBandwidth</b> | <i>number</i>, <i>string</i> or <i>func</i> | 4 | Heatmap object accessor function, attribute or a numeric constant for the heatmap bandwidth, in angular degrees. The bandwidth is an internal parameter of the [Gaussian kernel function](https://en.wikipedia.org/wiki/Gaussian_function) and defines how localized is the influence of a point on distant locations. A narrow bandwidth leads to a more spiky representation, while a broad one has smoother curves. |
 | <b>heatmapColorFn</b> | <i>string</i> or <i>func</i> | [Turbo colormap](https://blog.research.google/2019/08/turbo-improved-rainbow-colormap-for.html) interpolator with fading opacity | Heatmap object accessor function or attribute for the color interpolator function to represent density in the heatmap. This function should receive a number between `0` and `1` (or potentially higher if saturation > 1), and return a color string. |
 | <b>heatmapColorSaturation</b> | <i>number</i>, <i>string</i> or <i>func</i> | 1.5 | Heatmap object accessor function, attribute or a numeric constant for the color scale saturation. The saturation is a multiplier of the normalized density value (`[0,1]`) before passing it to the color interpolation function. It can be used to dampen outlier peaks in density and bring the data floor into view. |
-| <b>heatmapBaseAltitude</b> | <i>number</i>, <i>string</i> or <i>func</i> | 0.01 | Heatmap polygon object accessor function, attribute or a numeric constant for the heatmap base floor altitude in terms of globe radius units (`0` = 0 altitude, `1` = globe radius). |
-| <b>heatmapTopAltitude</b> | <i>number</i>, <i>string</i> or <i>func</i> | - | Heatmap polygon object accessor function, attribute or a numeric constant for the heatmap top peak altitude in terms of globe radius units (`0` = 0 altitude, `1` = globe radius). An equal value to the base altitude will yield a surface flat heatmap. If a top altitude is set, the variations in density will be used to define the altitude curves between base and top. |
+| <b>heatmapBaseAltitude</b> | <i>number</i>, <i>string</i> or <i>func</i> | 0.01 | Heatmap object accessor function, attribute or a numeric constant for the heatmap base floor altitude in terms of globe radius units (`0` = 0 altitude, `1` = globe radius). |
+| <b>heatmapTopAltitude</b> | <i>number</i>, <i>string</i> or <i>func</i> | - | Heatmap object accessor function, attribute or a numeric constant for the heatmap top peak altitude in terms of globe radius units (`0` = 0 altitude, `1` = globe radius). An equal value to the base altitude will yield a surface flat heatmap. If a top altitude is set, the variations in density will be used to define the altitude curves between base and top. |
 | <b>heatmapsTransitionDuration</b> | <i>number</i> | 0 | Duration (ms) of the transition to animate heatmap changes. A value of `0` will set the heatmap colors/altitudes immediately in their final position. New heatmaps are animated by rising them from the ground up and gently fading in through the color scale. |
 | <b>onHeatmapClick</b> | <i>func</i> | - | Callback function for heatmap (left-button) clicks. The heatmap object, the event object and the clicked coordinates are included as arguments: `onHeatmapClick(heatmap, event, { lat, lng, altitude })`. |
 | <b>onHeatmapRightClick</b> | <i>func</i> | - | Callback function for heatmap right-clicks. The heatmap object, the event object and the clicked coordinates are included as arguments: `onHeatmapRightClick(heatmap, event, { lat, lng, altitude })`. |