HeatMap not visible when it is zoomed in.

[gurjnderSingh]

When I do zoom in, HeatMap is visible. As soon I started zoon in I am unable to see the color of the Heat Map.

I am using the same code private var gradientColors = [UIColor.green, UIColor.red] private var gradientStartPoints = [0.2, 1.0] as [NSNumber]

  mapView.delegate = self
  heatmapLayer = GMUHeatmapTileLayer()
  heatmapLayer.radius = 100
  heatmapLayer.opacity = 0.7
  heatmapLayer.gradient = GMUGradient(colors: gradientColors,
                                        startPoints: gradientStartPoints,
                                        colorMapSize: 156)

My code is same as you provided on Google developer site Please let me know if anything is misssing Thanks!

[gurjnderSingh]

Before ZoomIn

After Zoom In

[arriolac]

This is perhaps due to the radius size you have set. Based on our docs, the value is recommended to be between 10 and 50. See: https://developers.google.com/maps/documentation/ios-sdk/utility/heatmap#customize-the-heatmap

[gurjnderSingh]

@arriolac Thanks! for your reply. But radius has no effect on this. I have tried all values from 10-60 for radius, for opacity value 1, and colorMapSize value 256. All these have no effect when I do zoom in. The result is the same as the above ss. Even I tried in the sample GitHub code the result is the same. In Android, the same is working fine i.e I have to do the same.

[gurjnderSingh]

@arriolac Please help to find the solution.

[james-innes]

Set maxIntensity: 3, as an option of the HeatmapLayer. Before setting this there was just a blur. This map has over ~14k points.

Or where there is a high density of points replace them with one point with a greater weight for performance if you don't require the pin point detail.

[hanandika]

Try this

private var gradientColors = [UIColor.green, UIColor.red]
private var gradientStartPoints = [0.05, 0.5] as [NSNumber]
.
.
.
// Set heatmap options.
heatmapLayer = GMUHeatmapTileLayer()
heatmapLayer.radius = 100
heatmapLayer.opacity = 1.0
heatmapLayer.gradient = GMUGradient(colors: gradientColors,
                                  startPoints: gradientStartPoints,
                                  colorMapSize: 256)
heatmapLayer.maximumZoomIntensity = 17
heatmapLayer.minimumZoomIntensity = 10

after that add your lat lng list to weightData

// Add the latlngs to the heatmap layer.
heatmapLayer.weightedData = list

[Rob-Biemans]

Set the colorMapSize to 16000 @gurjnderSingh