title: Layering a heatmap onto a map from a data array
body: <p>I am trying to generate a heatmap (if possible layered on top of a map of my area of interest). I have an array of data (Sea surface temperatures) for the Mediterranean Sea and I would like to generate a heatmap (red for hotter, blue for colder regions) and if possible layer this onto a map (such as google maps or similar) in order to make my data more readable. Are there any packages that can help me with this/does anyone know where I could look to find some sample scripts? Thanks for you help!</p>
  
  <p>I have tried using plotly and matplotlib, however these do not give the desired heatmap (it is all one colour).</p>