Attributes
Common properties
Overture Maps features are defined by three core properties:
theme
is a mandatory property analogous to "layer". The term is deliberately chosen to avoid some of the baggage that goes along with the word "layer".- Examples:
transportation
,buildings
,places
,administrative
- Examples:
type
is a mandatory property representing a feature type within the theme:- Example:
theme=transportation
,type=segment
- Example:
theme=buildings
,type=building
- Example:
subtype
is an optional property which can further refine the feature type within.- Example:
theme=transportation
,type=segment
,subtype=road
- Example:
Other common properties include:
bbox
is the bounding box for the feature, defined by two longitudes and two latitudes: latitude is a decimal number between -90.0 and 90.0; longitude is a decimal number between -180.0 and 180.0.version
is the version number of the feature, incremented in each Overture Maps release where the geometry or attributes of this feature changed.update_time
is the timestamp when the feature was last updatedsources
is the array of source information for the properties of a given feature, with each entry being a source object which lists the property in JSON Pointer notation and the dataset that specific value came from. All features must have a root level source which is the default source if a specific property's source is not specified.- `ext_' is the prefix for any additional top-level properties.
Complex attributes
Some feature properties are quite complex and require further explanation.
- Names: where applicable, complex attributes such as names will always use the same schema across all themes.
- Scoped and rule-based properties: a scoping property narrows the scope of its parent property and may only apply to a particular instance of the parent property; rule-based property is an array of rules, which are objects containing at least one scoping property.
- Transportation: the transportation schema is our most complex with many attributes that require additional documentation.