How can I get a msg.payload value to use it in a template and plot a map on a dashboard?

[dynamicdave]

I've not done it that way with a ui_template - I'm sure Google map's will need an API 'key' to be supplied.
If you do a search for 'google maps' on this forum you will see what other people have encountered.

I make use of this node to show a map on the Dashboard.
There is a lot of information on how to use this node in the following link.

node-red-contrib-web-worldmap

Here's an example to display/plot a mark on the map.

Note: The properties used are 'lat' and 'lon' (whereas Google uses 'lat' and 'lng').

As an example of how this node can be used, I used the web-worldmap node to plot wildfires around the world on the Dashboard

Plotting the location of wildfires on the Dashboard

Just been working on a "fun" project for my IoT students. Plotting the location of wildfires on the Dashboard. [world_wildfires] It makes use of data from NASA to plot markers on the worldmap node on the Dashboard. Although most of the function nodes (in the flow) use JavaScript, there is a section in the tutorial-guide that introduces some very basic JSONata to query and transform the array-data received from NASA. I must give credit to @E1cid for his work creating the Jsonata in the Chan…

Here's a direct link to the Tutorial mentioned in the above thread.
http://www.resources-area.co.uk/node-red-flows/wildfires/plotting_wildfires.pdf