USCongressionalDistrict

Congressional districts in the United States.

represents an entity of type "USCongressionalDistrict".

[prop]

gives the value of a specified property.

[{prop_i,…}]

gives the value of a list of properties.

[prop,{qual_ival_i,…}]

gives the value of a specified property modified by qualifier rules qual_i->val_i.

[Dated[prop,date]]

gives the value of a property associated with a particular date specification.

represents a class of entities with values of prop_i defined by spec_i.

Sample Entities

	AggregateHouseholdIncome	aggregate household income
	Area	area
	Coordinates	coordinates
	EntityClasses	entity classes
	EntityTypeList	entity type list
	FIPSCode	FIPS code
	GiniIndex	Gini index
	HasPolygon	has polygon?
	HousingUnits	households
	LandArea	land area
	LandAreaPercent	land area percent
	Latitude	latitude
	Longitude	longitude
	MedianAge	median age
	MedianHouseholdIncome	median household income
	Name	name
	PerCapitaIncome	per capita income
	Polygon	polygon
	Population	population
	PopulationByEducationalAttainment	population by educational attainment
	PopulationByGeographicalMobility	population by migration in previous 12 months
	PopulationByLanguageSpokenAtHome	population by language spoken at home
	PopulationByMaritalStatus	population by marital status
	PopulationByPovertyStatus	population by poverty status
	PopulationBySchoolEnrollment	population by school enrollment
	Position	position
	Representative	US Representative
	RuleStart	term start date
	UnweightedSampleHousingUnits	unweighted sample housing units
	UnweightedSamplePopulation	unweighted sample population
	USState	US state
	WaterArea	water area

"USCongressionalDistrict" entities each represent one congressional district, including non-voting members and historical, eliminated districts.
Some properties are available for the "USCongressionalDistrict" entity type as a whole and can be given using the form EntityValue["USCongressionalDistrict",property]. Such properties include:

	"Properties"	the list of available properties
	"PropertyCanonicalNames"	the standard names of available properties
	"SampleEntities"	a sample list of available entities (typically of length 10)
	"SampleEntityClasses"	a sample list of available entity classes (typically of length 10)
	"EntityCount"	number of entities available
	"Entities"	the list of available entities
	"EntityCanonicalNames"	the standard names of available entities
	"EntityClasses"	the list of available entity classes
	"EntityClassCanonicalNames"	the standard names of available entity classes
	"PropertyClasses"	the list of available property classes
	"PropertyClassCanonicalNames"	the standard names of available property classes
	"PropertyCount"	number of properties available

The following annotations can be used in the third argument of EntityValue["USCongressionalDistrict",property,annotation]:

	"Source"	source information for the property
	"Date"	the date associated with the entity-property value (if any)
	"EntityAssociation"	an association of entities and entity-property values
	"PropertyAssociation"	an association of properties and entity-property values
	"EntityPropertyAssociation"	an association in which the specified entities are keys, and values are a nested association of properties and entity-property values
	"PropertyEntityAssociation"	an association in which the specified properties are keys, and values are a nested association of entities and entity-property values
	"Dataset"	a dataset in which the specified entities are keys, and values are an association of property names and entity-property values

The following annotations can be used in the second argument of EntityValue[property,annotation]:

	"Qualifiers"	the list of possible qualifiers for the property
	"QualifierValues"	the list of possible values that can be given to each qualifier
	"DefaultQualifierValues"	the list of default values for the property's qualifiers
	"Description"	a brief textual description of the property
	"Definition"	a detailed textual definition of the property
	"PhysicalQuantity"	the physical quantity associated with the entity-property value
	"Unit"	the unit associated with the entity-property value

A qualifier value of Automatic indicates that an applicable format of values can be used; e.g. for the "Date" qualifier, this includes a proper date or date span.

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Use for entity discovery:

Find a property value for an entity:

Retrieve a dataset of all available properties for an entity:

Find the 10 wealthiest congressional districts by median income:

Visualize California congressional districts by median age:

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