Magnacarto

Magnacarto is a CartoCSS map style processor that generates Mapnik XML and MapServer map files.

It is released as open source under the Apache License 2.0.

The development of Magnacarto is sponsored by Omniscale and development will continue as resources permit. Please get in touch if you need commercial support or if you need specific features.

Features

• Easy to use map viewer

• Generate styles for Mapnik 2/3 and MapServer

MapServer

Mapnik

Current status

• Supports nearly all features of CartoCSS
  • Attachments
  • Instances
  • Classes
  • Color functions
  • Expressions
  • etc.
• Can successfully convert complex styles (like the OSM Carto style)

Missing

• Not all CartoCSS features are supported by the MapServer builder
• Improved configuration
• ...

Installation

Binary

There are binary releases available for Windows, Linux and Mac OS X (Darwin): http://download.omniscale.de/magnacarto/rel/

Source

Dependencies

You need Go>1.5 and git.

Compiling

First create a

GOPATH

mkdir -p go
cd go
export GOPATH=`pwd`

Then you need to enable GO15VENDOREXPERIMENT, if you are using Go 1.5. You can skip this if you are using 1.6 or higher:

export GO15VENDOREXPERIMENT=1

Next you can fetch the source code and build/install it:

go get -u github.com/omniscale/magnacarto
cd $GOPATH/src/github.com/omniscale/magnacarto
make install

Render Plugins

The web-frontend of Magnacarto can render map images with Mapserver and Mapnik.

Mapserver

The Mapserver plugin is already included in the default

magnaserv

mapserv

PATH

Mapnik

The Mapnik plugin needs to be compiled as an additional binary (

magnacarto-mapnik

mapnik-config

PATH

make install

Usage

magnacarto

magnacarto

-mml

magnacarto -mml project.mml > /tmp/magnacarto.xml

To build a MapServer map file:

magnacarto -builder mapserver -mml project.mml > /tmp/magnacarto.map

See

magnacarto -help

magnaserv

Magnaserv is a web-frontend for Magnacarto. Make sure the

./app

magnaserv

To start magnaserv on port 7070:

magnaserv

Magnaserv will search for .mml files in the current working directory or in direct sub-directories.

To start magnaserv on port 8080 with the Mapserver plugin enabled:

magnaserv -builder mapserver -listen 127.0.0.1:8080

You can configure the location of stylings, shapefiles or images, and database connection parameters with a configuration file. See

example-magnacarto.tml

magnaserv -builder mapserver -config magnacarto.tml

Documentation

See docs/examples for example files and usage instructions.

Refer to the Carto project for documentation of the CartoCSS format.

• https://github.com/mapbox/carto/blob/master/docs/latest.md
• https://www.mapbox.com/tilemill/docs/crashcourse/styling/

Refer to the following CartoCSS projects for larger .mml and .mss examples.

• https://github.com/mapbox/osm-bright
• https://github.com/gravitystorm/openstreetmap-carto

Please note that openstreetmap-carto relies on a few advanced Mapnik features that are not supported by Mapserver. Future versions of Magnacarto might work around these limitations.

Support

Please use GitHub for questions: https://github.com/omniscale/magnacarto/issues

For commercial support contact Omniscale.

Development

The latest developer documentation can be found here: http://godoc.org/github.com/omniscale/magnacarto

The source code is available at: https://github.com/omniscale/magnacarto/

You can report any issues at: https://github.com/omniscale/magnacarto/issues

Test

Unit tests

go test -short ./...

Regression tests

There are regression tests that generate Mapnik and MapServer map files, renders images and compares them. These tests require Image Magick (

compare

shp2img

go test ./...