I have played with Mapbox and can quite easily create a Choropleth map in Mapbox studio and interact with it in Javascript.
I would like to create Choropleth map of the states with the ability to change the colours of the states for 100 years of different data points. I'm not allowed to upload the data into Mapbox as its sensitive healthcare data and I can't get sign of for the $499 a month cost.
My idea is I create a mapbox style layer in MapBox Studio then push the data client side for each of the states depending on the year x that the user selects. I have seen quite a few cloropeth tutorials such as this https://www.mapbox.com/help/choropleth-studio-gl-pt-1/ but the data is added in through a layer in Mapbox Studio. My thoughts are to embed the large GeoJson in the style and only push the data to the Polygon ID's, whilst creating transtions between the two.
Does anyone have any ideas if this is possible? and perhaps any useful API requests which may help me achieve this https://www.mapbox.com/api-documentation/.
It's possible. There are two approaches:
Upload the geometry as a Dataset in Studio, or load it directly as a GeoJSON.
Set data attributes directly on the geometry.
Create a style with data-driven styles (eg, map "47" to "rgb(100,0,0)" and "153" to "rgb(250,250,0)" and let Mapbox interpolate.
Or:
Upload the geometry as a Tileset to Studio.
Calculate the color you want to represent each possible value of each state.
Generate a data-driven style property that maps each state's code to the color you want, like ...['FL','rgb(143,15,0)']....
Neither method will cope with large numbers of regions, but should be ok for 50 US states at low resolution.
More discussion here: https://github.com/mapbox/mapbox-gl-js/issues/4261
Related
A client would like to add their URL as a brand/watermark within a MapBox tiled vector layer in MapBox Studio, so that the watermark appears wherever the tiled vector layer is displayed. (One possible use-case is to discourage competitors from stealing that tiled layer in their own maps.)
Is it possible to add a watermark to a tiled layer in MapBox, and ensure that it's visible at least once in every view?
I tried adding a duplicate copy of a polyline dataset as a Symbol Layer, and labelling it with the client's URL using the Text Field option. This works but has the side effect of preventing the labels from appearing on the original copy of the line layer.
It is not possible to add a single occurrence of a watermark to a map style in Studio in the way that the Mapbox watermark is displayed on a map, but there are alternative approaches to achieve what you are looking to do.
If the underlying goal is to prevent competitors from using a particular map style (and hence an underlying tiled layer), the best approach is to set scopes and URL restrictions on the Mapbox access tokens being used to access the map style in a public environment. You can find more useful information about token management and access tokens in general in the Mapbox documentation. This approach could be used in conjunction with adding a branded "watermark" on the client side -- for example, placing a fixed div in the corner of a web map loaded with GL JS. Although this watermark obviously isn't included in the style itself, setting a URL restriction on the access token used to load the map would prevent others from accessing the same map with that token on other domains.
You could also experiment with adding a low-opacity background-pattern to relevant layers in the map style itself. This property could be used to mimic a traditional watermarked effect, where a particular logo is placed on an image at multiple regular intervals.
I want to label stations on my map, and I would like to clusterize the stops at different zoom levels to filter them down. So as you zoom out all you get is the start and end, and then finally a single label start->end.
How do I render a text label on a vector tile ?
I could fetch the stations as a geojson and reload on zoom change if there's no easy way to do this with tiles.
Is there a reason you need to encode your data differently per-zoom-level in the tiles or are you mainly concerned with displaying data differently per-zoom-level? If the latter, I would recommend looking for an approach that focuses more on styling the vector tiles you already have rather than trying to generate those tiles in a more complex fashion. You could try using a zoom function to style your data. If you're using Mapbox Studio, you can also set zoom-specific style rules in the Studio UI, which is the route you'll probably want to go if you're using Leaflet (I see the Leaflet tag in your post but it's not entirely clear what your implementation looks like).
If the former, you may need to use a tool like Tippecanoe. This route will likely be a bit more complex, but gives you fine-grained control over how your vector tiles are generated. Keep in mind that once you've created your tiles using Tippecanoe, you'll still need to style them somehow.
I'm using Mapbox GL JS. Is there any way I can style my base layer to look like the Mapbox Light example, but showing only the UK?
I assume I would use Mapbox Studio to build my own base layer, but I can't see any way in Studio to filter by country.
If that's not possible, is there any way I could show labels on the UK only, and show other countries as filled polygons? (As per this unanswered question.)
Unfortunately it is not possible to filter by a certain geography when selecting the data source for a layer. If you're working with Mapbox's tiles, they'll always cover the entire planet.
There is the possibility to restrict the map to a certain (rectangular) bounds, with the map.setMaxBounds method (https://www.mapbox.com/mapbox-gl-js/api/#Map#setMaxBounds). This might work reasonably well since you want to restrict the view to the UK, but might not be suitable depending on the geometry you want to restrict the view to.
As a workaround you could create a dataset and add a polygon that covers the entire planet except for the extent you want to show in your map. Then add this dataset in your style as the top most layer and style it with whatever you'd like the empty space in your map to look like.
The workaround has been also suggested in this SO answer, if you can get maptiles for the UK only (the SO answer gives a link, but for Germany) you can
upload them to Mapbox as a dataset, export it to tilesets, and then
to a map as a layer. Delete all other layers
You have also the possibility to Style a single country in Mapbox
studio ref this tutorial. The other countries are still shown, but you can style your map in a way to highlight UK
There is a option that allows you to show only one country highlighted. But drawback is, you lose all the layers and tile-level details. Here is the link https://www.mapbox.com/videos/how-to/map-a-single-country-in-mapbox-studio/.
But if you want to include the tile details as well as whole world map but in that map only one or two or custom amount of countries highlighted, then, from above link of Natural Earth download the zipped file of ne_10m_admin_0_countries and upload.
Go back to your map style, and instead of making a blank one. Add another layer of ne_10m_admin_0_countries in your current map. Select the country in the filter option (in same way as shown in video). And change its opacity. That's it.
Hope it helps. Have a great day.
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
I am developing a Map based iPhone application where I have to draw a map of any specific region depending upon the current location of that device.
Client is supplying me the .shapefile consisting of all the co-ordinates and data to draw the map.
We can store the shape file on the server and i think to draw the map on device with the data presented on .shapefile I need the tiles with different zoom level. So on the server side I have to convert the .shapefile into tile based file.
But I don't know how to do that conversion.
Can anyone please guide me?
Thanks in advance.
Ritz
Its a lot of work.
First, shapefiles only define the geometry - you need to decide what the features are going to look like. Are they points, lines, or polygons? Do you want them all in the same colour, or depending on their attributes?
Then get mapnik or TileMill and learn how to use that. Do you just want to present the shapefile, or do you want that on a base map? In which case you'll have to generate a transparent tile set and do raster image overlays in your application.
Is it the whole world? And to the same resolution as Google Maps zooms? Get a big bank of disk storage.
http://mapbox.com/tilemill/
http://mapnik.org/
Personally I'd look into converting the shapefile into a vector form that you could render on the client - GeoJSON perhaps. Then serve that.