A command line utility for generating consolidated TopoJSON from various data sources. Used for making fast vector maps with D3.
You will need to have the following non-Python dependencies installed:
npm install ogr2ogr
mapturner itself can be installed with pip:
pip install mapturner
mapturner relies on topojson 1.x (old version of topojson), we recommend installing this version of topojson inside your project root folder by running:
npm install -g email@example.com --prefix node_modules
To install firstname.lastname@example.org globally instead run:
npm install -g email@example.com
mapturner will search first for the topojson binaries installed within the project and fallback to searching the topojson binary on your
Developer install process:
git clone git://github.com/nprapps/mapturner.git cd mapturner mkvirtualenv mapturner pip install -r requirements.txt python setup.py develop
Define a YAML configuration file, such as the following example. The complete list of valid options is further on in this documentation.
bbox: '77.25 24.28 91.45 31.5' layers: countries: type: 'shp' path: 'http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/cultural/ne_10m_admin_0_countries.zip' id-property: 'NAME' properties: - 'country=NAME' cities: type: 'shp' path: 'http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/cultural/ne_10m_populated_places_simple.zip' id-property: 'name' properties: - 'featurecla' - 'city=name' where: adm0name = 'Nepal' AND scalerank < 8 quakes: type: 'csv' path: 'examples/nepal.csv' all-properties: True
Then run it!
mapturner input.yaml output.json
The following layer types are currently supported:
For each layer defined in the configuration file:
whereattribute is specified, the layer data will be filtered by that clause.
propertiesarray will be removed (to reduce file size), unless
all-propertiesis specified, in which case all will be kept.
id-propertyis set, data from that property will be set as the identifier for the features in the layer.
After each layer has been processed all of them will be concatenated into a single TopoJSON file. Each layer's key name will be used to identify it in the output.
For all layer types:
type: The type of layer. Valid types are
json(GeoJSON or TopoJSON), and
path: The path (relative or absolute) to the layer data file. (Required)
id-property: A property from the data file to use as the unique identifier for features. See also, the TopoJSON command-line documentation.
properties: A list of properties from the data to be kept in the output. All other properties are dropped.
all-properties: If true, then all properties are kept for this layer.
where: A SQL-like query predicate that will filter the feature data. This This uses exactly the same query syntax as ogr2ogr.
CSV layers only:
latitude: The name of a column in the data containing the latitude of the point/feature.
longitude: The name of a column in the data containing the longitude of the point/feature.
Cached shapefiles are stored in
~/.mapturner. You may wish to clear this folder periodically to free up space and ensure updated shapefiles are redownloaded.