.NET LFHeatMap

.NET and Xamarin port of LFHEATMAP iOS heat map package

Features

• extremely fast heat map generation from point/weight data pairs
• generates byte[] of RGBA images that can be used as needed
• variable boost/bleed
• portable class library

Adding LFHeatMap to Your Project

NUGET

Install-Package LFHeatMap

Source Files

Alternatively you can directly add the LFHeatMap.iOS project to your own project or LFHeatMap portable class library.

Demo - iOS

This demo plots the measured magnitudes of the 2011 Virginia Earthquake.

Running

1. Open and launch the LFHeatMapDemo project in VS or XS.
2. Move the slider on the bottom to adjust the boost.

LFHeatMap

This class contains the three basic static functions used to generate the heat maps.

1. Basic Heat Map

Supply the desired image dimensions and boost, as well as the point/value arrays. There should be a 1:1 mapping between these two arrays, that is each index in the points array should have a corresponding index in the weights array. Alternate you can also provide a PointWithWeight array.

2. Advanced Heat Map

Works generally the same as the basic heat map, but allows to tweak two additional parameters to control the "bleed" of heat rendering.

3. MKMapView Helper

Works the same as the basic heat map, but allows you to supply map-specific parameters. Pass an MKMapView object (typically the target you want to overlay), and an array of CLLocation objects corresponding to coordinates on the specified MKMapView object.

The function will convert these to the required CGRect/CGPoint values as needed.

License

LFHeatMap is available under the MIT license. See the LICENSE file for more info.

LF?

LFHeatMap comes from the work of George Polak here, and was ported to .NET and Xamarin by Rui Marinho.