geojson | GeoJSON implementation for PHP | Dataset library

I am trying to render the world map with elevation data using D3.

For this I use Natural Earth 50m land geojson : https://github.com/martynafford/natural-earth-geojson/tree/master/50m/physical

And Natural Earth elevation raster data : https://www.naturalearthdata.com/downloads/50m-raster-data/50m-shaded-relief/

I am using this tutorial : https://datawanderings.com/2020/08/08/raster-backgrounds/

So I first found the bounds of the geojson :

How can I add a mouse 'click' event to each polygon plotted on a leaflet map? I want to do this so I can then filter a separate widget based on data from the features (in this case WD21CD).

I have no idea where to begin.

Here's the documentation: https://openweathermap.org/api/weathermaps

Following that, and searching what I could online I tried the following, but it gives me a fatal error and never goes past that. (Note: I'm not sure what to put for the z, x, and y values either, so I left them, in addition to my API Key, blank here, but in my code I just put 1/1/1) My attempt, inserting temp_new to receive the temperature overlay:

I am trying to build an app that shows some areas(polygons/overlays) on the map and when a polygon is tapped I would like to print on console print("Polygon \(zone_id) has been tapped"). The polygons are rendered from a GeoJSON file where we can also find the zone_id in the properties feature. So far I rendered the overlays on the map but I am stuck and I appreciate some guidance where to go from here.

I will paste my code that I have so far and also a snippet of the GeoJSON file.

I've been incorporating the MarketCluster and the associated FeatureGroup.SubGroup plug ins from Leaflet to add additional functionality to my generated QGIS2web map.

Part of my requirements is toggleable layers and where MarkerCluster works well when I had categorized layers from QGIS that were automatically clustered with separate layers this is no longer the case. To my understanding I needed either MarkerCluster.LayerSupport or FeatureGroup.SubGroup plugins to handle the additional layers and still provide clustering.

I've incorporated the CSS from MarkerCluster, JS from MarkerCluster and SubGroup, as well as called it in the map and in the respective places but the icons aren't actually clustering - image below.

The bottom 3 layers are all under the parent group mcg and all have been added to the map and called under the plugin so I'm not too sure why they are not clustering at small scales?

Var map code:

i have a geoJSON

I'm trying to trigger some functionality based on the click of a marker on a GeoJSON layer in Leaflet. The eventual functionality I'm trying to implement is a flyout, or scroll out type modal populated from the individual feature's JSON attributes. Essentially, I'm trying to implement the functionality in this Tutsplus Tutorial with dynamic feature content based on the marker click.

I THINK I've figured out most of the pieces I need, but I'm struggling with how to add a data attribute, specifically data-open, to the individual marker. Building on an earlier question of mine I've realized it's not enough to just update a DOM element's CSS, but rather my app should be implementing changes based on data attributes to fully get the functionality I want.

From this question I know that this should be done by extending the L.Icon class that Leaflet provides, but the answer is a bit too terse for my current JS skills. I apologize for this effectively being a "ELI5" of a previously asked question, but I'm not sure where the options and slug come into function. I think they're implied by the question, rather than the answer I'm citing and being set on the marker itself.

Here's a simplified version of the the click handler on my markers, which grabs and zooms to location, gets feature info, and populates that info to a div. The zoom functionality works, as does extracting and placing the feature info, but I'm struggling with how to connect the functionality to trigger the modal and place the div with the feature info over the map.

I'm doing a Leaflet map with some GeoJSON data.

I try to add the cluster function to my JS file. As I added some filter and styling features according to properties, I'm unable to find the right way to code the cluster fonction.

Here is the GeoJSON layer and the filter verificator:

I am following tutorial in Scott Murray's D3 book. I have the following HTML / JS / D3 code script from the book: