I'm running a small flask app to serve tiles to a LeafletJS map. The tiles are served as protobufs and loaded with the below.
var loadLineAreas = L.vectorGrid.protobuf(window.origin + "/tiles/loadline/{z}/{x}/{y}.pbf", vectorTileOption)
MapName.addLayer(loadLineAreas)
This works and the tiles a rendered correctly.
Other layers from third partys include WMS tiles and L.tileLayer tiles which automatically cache with LeafletJS, but my tiles from the above do not.
Any suggestions on how to client side cache L.vectorGrid.protobuf ?
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I'm setting up a map server and I have successfully uploaded the Planet
Vector and raster map tiles.But when I try to render the map in my web application some tiles are not rendering and Grey tiles are displayed on zooming.Is there anything I can do it make it render completely?
I'm using Leaflet + CartoDB; I've also used Leaflet + Mapbox; and there may also be some Leaflet + GoogleMaps in my future.
My customer asked me this question: where do the Leaflet layers get painted onto the tiles? Is that done by Leaflet? Or by the Tile engine?
Does this change if I'm using a "regular" map engine (such as Mapbox) or if I'm using something like the KML-rendering plugin?
where do the Leaflet layers get painted onto the tiles? Is that done by Leaflet?
By default (unless you're doing something weird), that happens in your web browser, which is compositing DOM elements on top of each other. You can check this by using the developer tools in your browser and inspecting the DOM elements for the tiles, and the <canvas> or <svg> with your vector geometries. They are separate DOM elements, thus your browser is doing the compositing.
Does this change if I'm using a "regular" map engine (such as Mapbox) or if I'm using something like the KML-rendering plugin?
Not really. Mapbox-gl-js uses insane amounts of WebGL, so that means that the brunt of the workload moves from the browser's compositor to a WebGL stack. It still happens in the web browser, albeit in a different part of the browser.
There is no "KML rendering plugin" for leaflet, just KML loading plugins. Vector geometries are still rendered in a <canvas> or <svg> separate from the image tiles for the basemap, then composited.
You can, of course, run your own tile server (with software such as Geoserver, Mapserver, Mapproxy, mapnik+mod_tile, tirex, tilestream, or dozens of others). In that case, you obviously know you are rasterizing your data into tiles.
now I use leaflet.
I want to know what are their policies about heavy traffic.
like OSM, I have to make another server? then, how can i do?
thanks for answering.
Leaflet is a javascript library and does not provide tiles. So there is no limit in using leaflet.
Your question is more towards the provider of the tiles that leaflet uses.
For example:
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
attribution: '© OpenStreetMap contributors'
}).addTo(map);
The map you see is actually a set of images (usually 256x256 pixels). There are served by a tiles server. See https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames.
The limitation you want to know is the limitation of the tiles server.
Leaflet is the glue that knows which tiles to show according to the lat,lng you want to show.
The TileLayer you create tells leaflet where it must get the tiles from.
I have created one QGIS map server for serving map as WMS or WFS feature.
As I am adding the layers in QGIS various thumbnails of QGIS is appearing which I do not want to appear in my map.
Same thing is happening when I am accessing those layers on web via Leaflet. Please help me how to remove these thumbnails.
I am attaching screenshots regarding this problem:
I am a bit confused about Tiles in MapBox. As I understood, a tile is a little piece of map, as in a jigsaw puzzle.
MBTiles are images, but they are connected to a database to read data & let interactions be possible. So if I move the mouse, I can show details of the layers under the cursor.
Vector Tiles store all the data in vectors, and they are just used for a fast rendering of the image. Interaction with such data is not possible.
Am I wrong?
Now, I see that there is the tool TileMill for MBTiles, and MapBox Studio Classic for Vector Tiles. I guess they are for different purposes; the first for interactive maps, the latter for fast rendering.
So.... why is TileMill not supported anymore, in favor of MBStudio?
Is it possible to make interactive maps with MBStudio as well?
Thank you
This is a great question!
mbtile is a filetype that can contain either raster or vector tiles. Think about it like an Adobe Illustrator .ai file -- it can either contain vector or raster data. Both raster tiles and vector tiles can be in mbtile format.
With TileMill, your vector data (shapefile, CSV, etc.) was combined with your CartoCSS style and passed to Mapnik to generate a bunch of tiled images. You could then store your tiles and feed them to a web map via a tile server. With Mapbox Studio Classic, you are converting your data to vector tiles and creating a CartoCSS style to style the data, but the image tiles aren't created until the map is requested via the browser. Ultimately, the output on the map is the same -- a grid of raster tiles.
The interactivity you created in TileMill with raster tiles is happening via a UTFGrid. This is an invisible raster layer that sits beneath the image tiles and adds interactivity to certain locations. The interactivity is not actually connected to any individual features at all -- it's just at the same location as your features. This is also possible in Mapbox Studio Classic, as the output in the map will also be a grid of raster tiles. You can read more about how to do this in Mapbox Studio Classic in the style quickstart guide.
So to answer your question, the move to Mapbox Studio Classic was to take advantage of vector tiles. They are a lot smaller than raster image tiles, and they can be styled on the fly, so, for example, you don't have to store two separate sets of images to accommodate retina screens. It also means you can have multiple styles applied to the same vector data on the fly, which means you don't have to regenerate a whole set of images for every style or every small change.
If the Metadata table contains a record format=pbf then the mbtiles is a vector tiles and not raster. mbtiles SQLite database can be a container for vector tiles which have in the Tiles table and tile_data blob field PBF -Protocol Buffers - protobuf ( https://github.com/google/protobuf – language neutral platform neutral mechasism for serializing structured data) Developed by Google. Tools like MapBox Studio build vector tiles from GIS Vector Data and databases