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= [https://github.com/kartotherian/kartotherian/blob/master/README.md Kartotherian] - Maps Tile service for Wikipedia = | == [https://github.com/kartotherian/kartotherian/blob/master/README.md Kartotherian] - Maps Tile service for Wikipedia == | ||
Kartotherian serves map tiles by getting vector data from Cassandra, applying the [https://github.com/kartotherian/osm-bright.tm2/blob/master/README.md style] to it, and returning raster images. It is also capable of serving a "static image" - a map with a given width/height/scaling/zoom, and can server vector tiles directly for on-the-client rendering (WebGL maps). | Kartotherian serves map tiles by getting vector data from Cassandra, applying the [https://github.com/kartotherian/osm-bright.tm2/blob/master/README.md style] to it, and returning raster images. It is also capable of serving a "static image" - a map with a given width/height/scaling/zoom, and can server vector tiles directly for on-the-client rendering (WebGL maps). | ||
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== Very quick start == | == Very quick start == | ||
<syntaxhighlight> | <syntaxhighlight lang="bash"> | ||
git clone https://github.com/kartotherian/kartotherian.git # Clone the repository | git clone https://github.com/kartotherian/kartotherian.git # Clone the repository | ||
cd kartotherian | cd kartotherian | ||
</syntaxhighlight> | </syntaxhighlight> | ||
<syntaxhighlight> | <syntaxhighlight lang="bash"> | ||
npm install | npm install | ||
node server.js -c config.external.yaml | node server.js -c config.external.yaml | ||
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On Ubuntu these can be installed with | On Ubuntu these can be installed with | ||
<syntaxhighlight> | <syntaxhighlight lang="bash"> | ||
sudo apt-get install git unzip curl build-essential sqlite3 pkg-config libcairo2-dev libjpeg-dev libgif-dev libmapnik-dev | sudo apt-get install git unzip curl build-essential sqlite3 pkg-config libcairo2-dev libjpeg-dev libgif-dev libmapnik-dev | ||
</syntaxhighlight> | </syntaxhighlight> | ||
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=== Clone the repo and install npm dependencies === | === Clone the repo and install npm dependencies === | ||
<syntaxhighlight> | <syntaxhighlight lang="bash"> | ||
git clone https://github.com/kartotherian/kartotherian.git | git clone https://github.com/kartotherian/kartotherian.git | ||
cd kartotherian | cd kartotherian | ||
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=== Edit Kartotherian configuration - config.yaml === | === Edit Kartotherian configuration - config.yaml === | ||
<syntaxhighlight> | <syntaxhighlight lang="yaml"> | ||
# 0 - one instance, 1+ - multi-instance with autorestart, ncpu - multi-instance, one per CPU | # 0 - one instance, 1+ - multi-instance with autorestart, ncpu - multi-instance, one per CPU | ||
num_workers: 0 | num_workers: 0 | ||
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=== Add Varnish caching layer (optional) === | === Add Varnish caching layer (optional) === | ||
Might require caching headers added to the source/config. | Might require caching headers added to the source/config. | ||
<syntaxhighlight> | <syntaxhighlight lang="bash"> | ||
# From https://www.varnish-cache.org/installation/debian | # From https://www.varnish-cache.org/installation/debian | ||
sudo -Hi | sudo -Hi | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
Change default backend to: | Change default backend to: | ||
<syntaxhighlight> | <syntaxhighlight lang="text"> | ||
backend default { | backend default { | ||
.host = "localhost"; | .host = "localhost"; | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
Add this to vcl_deliver (to track hits/misses): | Add this to vcl_deliver (to track hits/misses): | ||
<syntaxhighlight> | <syntaxhighlight lang="text"> | ||
if (obj.hits > 0) { | if (obj.hits > 0) { | ||
set resp.http.X-Cache = "HIT"; | set resp.http.X-Cache = "HIT"; | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
Edit /etc/systemd/system/varnish.service - set proper listening port (80) and cache size: | Edit /etc/systemd/system/varnish.service - set proper listening port (80) and cache size: | ||
<syntaxhighlight> | <syntaxhighlight lang="text"> | ||
ExecStart=/usr/sbin/varnishd -a :80 -T localhost:6082 -f /etc/varnish/default.vcl -S /etc/varnish/secret -s malloc,4g | ExecStart=/usr/sbin/varnishd -a :80 -T localhost:6082 -f /etc/varnish/default.vcl -S /etc/varnish/secret -s malloc,4g | ||
</syntaxhighlight> | </syntaxhighlight> | ||
In bash: | In bash: | ||
<syntaxhighlight> | <syntaxhighlight lang="bash"> | ||
systemctl daemon-reload # because we changed the .service file | systemctl daemon-reload # because we changed the .service file | ||
systemctl restart varnish.service | systemctl restart varnish.service | ||
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=== Run Karthotherian: === | === Run Karthotherian: === | ||
<syntaxhighlight> | <syntaxhighlight lang="bash"> | ||
npm start | npm start | ||
</syntaxhighlight> | </syntaxhighlight> | ||
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In a lot of cases when there is an issue with node it helps to recreate the | In a lot of cases when there is an issue with node it helps to recreate the | ||
<code>node_modules</code> directory: | <code>node_modules</code> directory: | ||
<syntaxhighlight> | <syntaxhighlight lang="bash"> | ||
rm -r node_modules | rm -r node_modules | ||
npm install | npm install | ||
</syntaxhighlight> | </syntaxhighlight> |
Latest revision as of 02:12, 8 August 2021
Kartotherian - Maps Tile service for Wikipedia
Kartotherian serves map tiles by getting vector data from Cassandra, applying the style to it, and returning raster images. It is also capable of serving a "static image" - a map with a given width/height/scaling/zoom, and can server vector tiles directly for on-the-client rendering (WebGL maps).
To see the tiles without Varnish cache, connect to Kartotherian using an ssh tunnel, e.g. ssh -L 6533:localhost:6533 maps-test2001.codfw.wmnet
and browse to http://localhost:6533
Maps nodejs server for vector-based tiles and snapshots, designed for Wikipedia and other sites. It ties together a number of MapBox components for vector and raster rendering based on Mapnik 3 , and uses service runner for scalability, performance monitoring and stability.
Serving tiles
Kartotherian can serve vector and raster tiles in multiple formats and optional scaling:
http://.../{source}/{zoom}/{x}/{y}[@{scale}x].{format}
- The sources are configured with the
source config file . Sources configuration supports different methods of tile storage, such as Cassandra or files, generation from postgress db, overzoom to extract the tile from lower zooms if missing, layer extraction, mixing multiple sources together, etc.
- Optional scalling can render larger images for high resolution screens (only those enabled in the source, e.g.
[1.5, 2]
) - Supported formats include PNG ang JPEG, SVG, PBF vectors, and JSON (with
nogeo
andsummary
debug options)
Static map images
Kartotherian supports static image generation. Users may request a PNG or a JPEG snapshot image of any size, scaling, and zoom level:
http://.../img/{source},{zoom},{lat},{lon},{width}x{height}[@{scale}x].{format}
# image centered at 42,-3.14, at zoom level 4, size 800x600 http://.../img/osm-intl,4,42,-3.14,800x600.png
# the same but for higher DPI device with 1.5 scaling http://.../img/osm-intl,4,42,-3.14,800x600@1.5x.png
Info data
Kartotherian can be used as a source of the PBF data for Mapbox studio. See info about style editing in osm-bright-source . The info data is available athttp://.../{style}/pbfinfo.json
for pbf source, and http://.../{style}/info.json
for the styled image source.
Markers
Kartotherian can generate marker images by wrapping any of the maki icons with a pushpin image, in any color. The URL schema is matched to the one used by the mapbox.js .
http://.../v4/marker/pin-l-cafe+de00ff@2x.png http://.../v4/marker/ {base} - {size:s|m|l} [-{letter-or-digit-or-icon-name}] + {color} [@2x] .png
At this point, only "pin" is supported for the base. The color is a 3 digit or 6 digit hex number. Optional scaling can only be 2x. Beyond the pre-defined maki icons, you may give a number (0-99), a single letter (a-z), or nothing.
Very quick start
git clone https://github.com/kartotherian/kartotherian.git # Clone the repository
cd kartotherian
npm install
node server.js -c config.external.yaml
Browse to http://localhost:6533/
The set up inside sources.external.yaml
does not use any storage or caching, so it will not be suitable for production. You will need to to set up your own local database as described in osm-bright.tm2source , which is installed in node_modules/osm-bright-source
, and configure additional source chains and setup a proper storage to make this into a production system.
Configuration
Inside theconf
key:
sources
- (required) Either a set of subkeys, a filename, or a list of file names. See core on how to configure the sources.variables
(optional) - specify a set of variables (string key-value pairs) to be used inside sources, or it could be a filename or a list of filenames/objects.defaultHeaders
(optional, object) - a set of extra headers that will be sent to the user unless the source provides its own. (public requests only)headers
(optional, object) - a set of extra headers that will be sent to the user instead of the headers returned by the source. (public requests only)
For the rest of the configuration parameters, see service runner config info.
Components
Kartotherian platform consists of a number of elements, some of which conform to the general specifications established by MapBox , and therefor can reuse components that confirm to the same specification. Also, see Tilerator , an optional stand-alone service to pre-generate tiles. Tilerator is separate from Kartotherian, but it reuses most of the same components.
Components by Wikimedia Foundation
- kartotherian-core - Loads and configures tile sources, and provides some common utility functions
- kartotherian-server - Handles user requests for tiles and source info, as well as registers additional data type handlers like maki markers and image snapshots.
- kartotherian-maki - Request handler for maki markers - generates PNG marker images that can be used from geojson.
- kartotherian-snapshot - Request handler for static images by combining multiple tiles into one snapshot image of a requested size.
Tile sources
- kartotherian-autogen - Tile source that checks "storage" source for a tile, and if not found, gets it from the "generator" source and saves it into the "storage"
- kartotherian-cassandra - Tile source that stores tiles in the Cassandra database
- kartotherian-demultiplexer - Tile source that combines multiple sources by zoom level
- kartotherian-layermixer - Tile source capable of mixing different vector layers from multiple tile sources
- kartotherian-overzoom - Tile source that will zoom out if the requested tile does not exist, and extracts the needed portion from the lower-zoom tile it finds.
- kartotherian-postgres - Tile source that stores tiles in the Postgres database
- kartotherian-substantial - Tile source that filters out tiles that are not significant - e.g. nothing but water or land.
Data and Styling
- osm-bright-source - SQL queries used by the
tilelive-bridge
to generate a vector tile from Postgres Database - osm-bright-style - Style used by the
tilelive-vector
to convert vector tiles into images. - osm-bright-fonts - Fonts used by the
osm-bright-style
.
Components by MapBox
- tilelive - ties together various tile sources, both vector and raster
- tilelive-bridge - generates vector tiles from SQL
- tilelive-vector - converts vector tiles to raster tiles
- abaculus - generates raster images of any location and size from a tile source
Other Relevant Components
- mapnik - Tile rendering library for node
- leaflet - JavaScript library for mobile-friendly interactive maps
In depth step-by-step:
This documentation assumes that you are going to use https://github.com/kartotherian/osm-bright.tm2source osm-bright.tm2 and [osm-bright.tm2source] for a map style.
Install node.js and npm
Node.js v6 or v8 required; v10+ currently not supported.
For Windows and Mac, downloadable installers can be found at https://nodejs.org/download/release/latest-v6.x/ or https://nodejs.org/download/release/latest-v8.x/.
For Linux, installation via the instructions at https://nodejs.org/en/download/package-manager/ is recommended.
Install other software dependencies
On Ubuntu these can be installed with
sudo apt-get install git unzip curl build-essential sqlite3 pkg-config libcairo2-dev libjpeg-dev libgif-dev libmapnik-dev
Clone the repo and install npm dependencies
git clone https://github.com/kartotherian/kartotherian.git
cd kartotherian
npm install
Source
Set up osm-bright.tm2source as described in its documentation. .
osm-bright.tm2source is installed in node_modules/osm-bright-source
Edit Kartotherian configuration - config.yaml
# 0 - one instance, 1+ - multi-instance with autorestart, ncpu - multi-instance, one per CPU
num_workers: 0
# Host port
port: 6533
# Comment out this line to listen to the web
# interface: localhost
# Place all variables (e.g. passwords) here - either as a filename, or as sub-items.
variables:
# Place all sources you want to serve here - either as a filename, or as sub-items.
# See sources.prod.yaml for examples
sources: sources.yaml
Configure Kartotherian
Use one of the config files, or update them, and make a link config.yaml to it.
Add Varnish caching layer (optional)
Might require caching headers added to the source/config.
# From https://www.varnish-cache.org/installation/debian
sudo -Hi
apt-get install apt-transport-https
curl https://repo.varnish-cache.org/GPG-key.txt | apt-key add -
echo "deb https://repo.varnish-cache.org/debian/ jessie varnish-4.0" >> /etc/apt/sources.list.d/varnish-cache.list
apt-get update
apt-get install varnish
vi /etc/varnish/default.vcl
Change default backend to:
backend default {
.host = "localhost";
.port = "6533";
}
Add this to vcl_deliver (to track hits/misses):
if (obj.hits > 0) {
set resp.http.X-Cache = "HIT";
} else {
set resp.http.X-Cache = "MISS";
}
Edit /etc/systemd/system/varnish.service - set proper listening port (80) and cache size:
ExecStart=/usr/sbin/varnishd -a :80 -T localhost:6082 -f /etc/varnish/default.vcl -S /etc/varnish/secret -s malloc,4g
In bash:
systemctl daemon-reload # because we changed the .service file
systemctl restart varnish.service
systemctl status varnish.service # check the service started with the right params
varnishstat # monitor varnish performance
Run Karthotherian:
npm start
In browser, navigate to http://localhost:6533/
.
Troubleshooting
In a lot of cases when there is an issue with node it helps to recreate the
node_modules
directory:
rm -r node_modules
npm install