How to show labels for GeoJSON points in a Leaflet map?

How to show labels for GeoJSON points in a Leaflet map?

How to show labels for geojson points in a Leaflet map? There is Leaflet.label that is now deprecated in favour of L.Tooltip, but that only shows text on hover. I want to show the text labels directly on the map without needing user interaction.

How to add static labels to leaflet polygons?

The leaflet label plugin also allows static labels, see the demo . The only reason the polyline label is not static is that it moves around as you move along the polyline. You can probably do better than this, by overriding bindLabel () for Polygons but this is a simple way to add a static label to the center of a polygon:

How are features and featurecollections used in GeoJSON?

Features in GeoJSON contain a Geometry object and additional properties, and a FeatureCollection contains a list of Features. Leaflet supports all of the GeoJSON types above, but Features and FeatureCollections work best as they allow you to describe features with a set of properties.

How to put a label on a leaflet?

What I’d like is to put a simple text label in the center of each polygon. (For example, something like putting state name in the center of each state). I’ve looked at: https://groups.google.com/forum/?fromgroups=#!topic/leaflet-js/sA2HnU5W9Fw

When to use the oneachfeature option in GeoJSON?

onEachFeature. The onEachFeature option is a function that gets called on each feature before adding it to a GeoJSON layer. A common reason to use this option is to attach a popup to features when they are clicked.

How are points handled in a GeoJSON layer?

Points are handled differently than polylines and polygons. By default simple markers are drawn for GeoJSON Points. We can alter this by passing a pointToLayer function in a GeoJSON options object when creating the GeoJSON layer. This function is passed a LatLng and should return an instance of ILayer, in this case likely a Marker or CircleMarker.

How do I connect two coordinates with a line using leaflet?

Although two lines are connected in this image, they are separated. If you run the code and zoom in, you will see that the two lines are separated. Leaflet can add lines using the addPolylines function. The problem with this is it assumes every line is connected – you will get them all linked.

How do I add a line to leaflet?

Leaflet can add lines using the addPolylines function. The problem with this is it assumes every line is connected – you will get them all linked. The best way to fix this (AFAIK) is to use a loop:

How to reshape data frame in leaflet?

I changed the format of mydf and create a new data frame for leaflet. You can reshape your data in various ways.

How to add a geojsonlayer to a map?

After the function, add the geojsonLayer to the map by using map.addLayer (geojsonLayer): HOORAY! We did it! Here’s the final code (including the GeoJSON content):

How to display labels in JavaScript leaflet.js?

Here is a working solution : You define an hashtable with a latLng for all the exception countries, those for which the feature center is not the center you want : To display the label, you put an invisible marker at the correct position a bind a tooltip to it :

Why is leaflet not loading with GeoJSON file?

Specifically, I now can’t get Leaflet to load with geojson file, encountering the error leaflet.js:5 Uncaught Error: Invalid GeoJSON object. Here’s the code I am trying:

How do you control visibility in GeoJSON layer?

To accomplish this we pass a function as the filter option. This function gets called for each feature in your GeoJSON layer, and gets passed the feature and the layer. You can then utilise the values in the feature’s properties to control the visibility by returning true or false.

How to zoom to polygon bounds on click leaflet?

Leaflet ´, GeoJSON I have a leaflet map with a lot of polygons (borders). I would like to zoom to the bounds on the polygon, when the user click. Until now its only possible for me to zoom to the the bounds of all the polygons in the GeoJSON file.

How to zoom to polygon bounds in GeoJSON?

Until now its only possible for me to zoom to the the bounds of all the polygons in the GeoJSON file. what to change here? You may want to detect if the clicked feature is a marker (point feature), and act accordingly, as it will not have the getBounds () method.

How to detect a clicked feature in GeoJSON?

You may want to detect if the clicked feature is a marker (point feature), and act accordingly, as it will not have the getBounds () method. Note: in the case of attaching a listener onto a Feature Group (like your GeoJSON group layer), event.target gives the entire group, not the specific single feature.

How to create a control component in GeoJSON?

Create the control component // This function is run for every feature found in the geojson file. It adds the feature to the empty layer we created above This comment has been minimized. This comment has been minimized.

How to add a GeoJSON layer to a layer?

Get geojson data and run a function to add it to a layer from step 1 * 3. Create the function that will be run in step 2 * 4. Create the list of layers that will appear in the control component * 5. Create the control component // This function is run for every feature found in the geojson file.

Is there a tooltip that shows labels on a map?

There is Leaflet.label that is now deprecated in favour of L.Tooltip, but that only shows text on hover. I want to show the text labels directly on the map without needing user interaction.

How to add a GeoJSON polygon layer to a file?

I’m trying to add a GeoJSON polygon layer from a file, give it a specific style and show the label (ToolTip) but couldn’t find a way to do it in a single function call .

Which is the best GIS format for GeoJSON?

GeoJSON is becoming a very popular data format among many GIS technologies and services — it’s simple, lightweight, straightforward, and Leaflet is quite good at handling it.