At Mapbox's site, https://www.mapbox.com/maps/ they appear to load an image until the map is ready to display in the hero banner. How have they done this? Also the map movement on mouse hover is great, how are they doing this as well?
You can use the map's load event [1] to know when the map is finished loading:
map.on('load', function () {
});
You can request a static map via the API https://docs.mapbox.com/api/maps/#static.
You can use some HTML, JavaScript and CSS to show the from the Mapbox Static API while the GL JS map is loading in the background behind your img. Once you have that load event you can hide your img to reveal the interactive map.
You must request that PNG image via the Static Map API, as it's against the Mapbox Terms of Service to download and cache it yourself [2].
To ease the map, you just need to listen to mousemove events and then slightly tweak the map bearing and/or pitch with map.jumpTo or map.easeTo [3].
[1] https://docs.mapbox.com/mapbox-gl-js/api/#map.event:load
[2] https://www.mapbox.com/tos/#[YmtcYmns]
[3] https://docs.mapbox.com/mapbox-gl-js/api/#map#jumpto
Related
I'm trying to find a way to load external WMS layers to Leaflet map, just like Leaflet.FileLayer does for local files.
I'm imagining a button that opens a form window to introduce the URL and then select the layer's that will be loaded to the map. Is there any plugin or an approach to do that?
Thanks!
How do I check that a Mapbox raster layer is displayed on the map?
My goal is to stop a loading animation. I know I can check if the map itself is ready.
map.on('ready', someFunction)
How do I do something like this but for a specific layer?
There are events for when pieces of data load https://docs.mapbox.com/mapbox-gl-js/api/#mapdataevent, but unfortunately not for when all loading is complete.
How can I lazyload map tiles when using Leaflet?
Especially on mobile devices I don't want to load maptiles at the beginning because most of my users never scroll down to the map.
Well, a very simple trick would be to create your map, or at least to add your Tile Layer, only when your map container comes into viewport.
That way, the tiles will not be requested before the map is actually viewable.
As to how to know when this situation happens, you should find plenty resources online and here. Basically you compare the document scroll and the map container position, and listen to scroll event. A more recent solution uses Intersection Observer.
L.tileLayer(this.settings.tiles + '/{z}/{x}/{y}.jpg', {...})
.on('tileloadstart', function(event) {
event.tile.setAttribute('loading', 'lazy');
});
After adding custom image markers using the Marker.addTo() method there doesn't seem to be a way to query the markers to dynamically set the draggable property on/off. There is no way to get a collection of markers added to a map. Please help!
I don't see a .getMarker() method on the map object nor do I have access to the collection of custom image markers added to the map. Is there any other method besides Markers to add custom photo images to the map and control them?
I see plenty of great examples using symbols, etc but I need to use custom images for each marker.
I would like to add photo thumbnails on a map and query them by name or id to update their draggable state on/off in realtime. Thanks!
may I know what framework are you using ,and you can use geojson to add multiple markers, and can define draggable as a property in geoJson and alter it if you are are using JS or just define the property as a state variable in react and play with it accordingly.
at present our project is using the leaflet, I take the map parameters to background program (map.getZoom() and map.getbounds()) , then load the returned picture(return from background program) by imageoverlay.
excuse me how to solve continuous drag or continuous scaling, only the implementation of calling a daemon?
If you mean you dynamically load the base map (i.e. the image that is zoomable, draggable and that fills a big pane, not just a small portion that would have needed a single image overlay), you should probably rather do it through a Canvas Tile Layer:
Used to create Canvas-based tile layers where tiles get drawn on the browser side.
With this, you set up a myCanvasTileLayer.drawTile function that is called by Leaflet anytime the map needs more tiles (due to user panning / zooming). Please refer to Leaflet doc for the function arguments.
If you want to stick with your image overlay technique, you might want to listen to drag and zoomend map events to re-trigger your function that loads a new image overlay.