Radius of gradient very strange about heatmap.js HOT 10 OPEN

hello? ist this normal behaviour or did I do something wrong?

from heatmap.js.

In the dataset you pass to the heatmap layer try not passing a value for each point. The documentation says that it defaults to 1 but at least in the heatmap-leaflet implementation, this is a lie. I found this works well when you've got a large dataset.

from heatmap.js.

Well, the reason I chose this library was that it is able to handle values for data points. I tried to debug this error and came to the conclusion that the 1px gradient line, which gets contstructed and repeatedly applied to form a circle, looks correct. (color change in the middle between green & red) so I think the error is created later. But I'm definitely a noobie on javascript graphics :/

from heatmap.js.

Certainly, it should work correctly if you're passing through logical values to the data points. You'll start having problems (similar to what you describe above) when all your data points have values of 1. My suggestion was just a stab in the dark having not looked at your code, though it sounds like I was a bit off :)

from heatmap.js.

I'm using this code to add data to the heat map. All values are min-max normalized, so all values are between [0,1] with only 1 (or very few) values being == 1. (For detailed infos, please have a look at the JS-Code @http://h1968061.stratoserver.net/myhive/)

   window.heatmapLayer = L.TileLayer.heatMap({
    radius: { value: 450, absolute: true },
    opacity: 0.6
  });
  heatmapLayer.setData(generatePoints()); // where this is a set of (lat,lon,value)

from heatmap.js.

Please note that I'm no expert with this library, I've just been battling with it today for the first time. That said, it looks like you generate your points every time you zoom the map, only adding the points to the heatmap layer that fall within the bounds you're viewing. I'm assuming this will cause a few problems:

1. zoom in and then pan to the left. No new data points for the heatmap will be rendered on the map, they'll only show up when you zoom again.

2. the max value will be recalculated (based on the highest value of any of the rendered data points), so the intensity of a single point will change based on what points are currently rendered. ie. zoom down to street level with only a single point and the max value becomes whatever the value of that point is. The point is therefore rendered as if it had the highest intensity.

You'd have to check out the performance impact, but I would load all of the points in each separate category you have into a separate feature groups (you could even use the leaflet layers control to show these on your map instead of your sidebar, alternatively do it programmatically using the same approach).

from heatmap.js.

Having the same issue with this any update on how to fix this?

from heatmap.js.

I am also having the same issue. My heatmap just looks like a giant blob with a slim ring of other colors around it.

from heatmap.js.

Could you try it with the new heatmap.js v2.0 release? The rendering mechanism changed a lot

from heatmap.js.

also having this issue. values are 0-100. getting a giant circle blob.

edit: using the latest version

from heatmap.js.