Bước tới nội dung

Bản mẫu:Data United States

Sửa liên kết
Bách khoa toàn thư mở Wikipedia

This template contains various independently retrievable data items about United States in the form of parameter values of a variable template of choice, in a standardized fashion. It is a member of a family of templates, those with names starting with "Data" in Category:Data templates. The system used is similar to that of Wikipedia:WikiProject Flag Template. The corresponding template of that project is Template:Country data United States.

Parameters Bản mẫu:Data United States

Parameter nameValueMeaning
1United Stateslast part of template name, used to identify it within the family of templates[1]
articlearticle name; needs to be specified only if it differs from United States; in applications, use [[{{{article|{{{1}}}}}}]] to link to the article (as has been done at the top of this page)
short nameshorter display name to be used in some contexts; an application or application parameter can specify whether this is used; only intended for dispensing with disambiguation in a context where it is not needed
typecountrytype of entity, e.g. continent, country, province, municipality
codecode
code descriptioncode description
continentBản mẫu:Data North Americacontinent, if type is lower than "continent"
countrycountry, if type is lower than "country"
provinceprovince, if type is lower than "province"
popbase308.745.538population on a given date (stored without commas)
popbaseyear2010year for which the population base figure applies
popbasemonth4month for which the population base figure applies
popbaseday1day for which the population base figure applies
popinc5644.466population increase per day; used to extrapolate the population figure
land area9.147.593land area in km2 (stored without commas)
total area9.833.517total area in km2 (stored without commas)
flag imageFlag of the United States.svgname of the flag image (or other illustration, if there is no flag) shown above

Throughout the family of templates, fixed names are used for the parameters. (The parameter names are kept short to reduce counts for the post expand include size and the template argument size in cases where these are applicable.) However, not necessarily all parameters have been given a value: some parameters may not be applicable, while for some other parameters the value may just have not been specified yet. The table shows all parameters, and for each the value, if specified.


  • Template:Data North America


Derived data Bản mẫu:Data United States

As of tháng 4 16, 2026, the population is approximately 341.816.000 (estimated by extrapolation), which is 4.13% of the world's population.

The total area is 9.833.517 kilômét vuông (3.796.742 dặm vuông Anh), which is Bản mẫu:Ppm of the land area of the world. The water area is 7% of the total area.

The population density is 37,4 trên kilômét vuông (96,9/sq mi)[chuyển đổi: số không hợp lệ] land area.The population density is 34,8 trên kilômét vuông (90,1/sq mi)[chuyển đổi: số không hợp lệ] total area.

Retrieval of data items Bản mẫu:Data United States

{{data United States|pst2|land area}}, using parameter selection template Template:Pst2, gives the parameter land area, etc.

For retrieval of more data items it is more efficient to prepare a template for that, to be used as follows:

{{data United States|template name|..|..|..|..}}

so that this data template needs to be called only once.[2] The default template is Template:Show data, producing this page.

The four parameters are optional, they are passed on to the prepared template as parameters 2-5.

Special templates:

A parameter being undefined or empty typically means the same, see below. {{data ..|pst2|..}} gives the empty string and the text "{{{..}}}", respectively. Therefore an application checking the parameter has to check both. Checking whether a result is equal to e.g. the text "5644.466" cannot be done directly with #ifeq in a template which itself has also a parameter with that name, because if that is defined, there would be a comparison with the value instead of the text itself. Instead, it can be checked whether the first character of the result is "{", e.g.: {{#ifeq:{{padleft:|1|{{data {{{continent}}}|pst2|popinc}}}}|{|..|..}}.

Creating new data templates Bản mẫu:Data United States

Template:Data/preload can be used to create new data templates. On the page of the data template of a province, if there is no data template yet for the country, a link appears to create that, preloading this template. Otherwise the wikitext can be copied to the new data template. For parameters which are not applicable, such as country for a country, the parameter definition "country=" can be deleted. For parameters to be filled in later the parameter definition like "popinc=" (specifying the empty string as value) can be left in the wikitext to be filled in later. Do not forget parameter 1.

Efficiency Bản mẫu:Data United States

In this template system each template contains various properties of a single entity, as opposed to the other common system, where a template contains one property (e.g. population or area) of many entities. Although that other system can be convenient if updates of a property for all these entities become available together, in the case of large-scale use of data on one page that other system can be problematic due to its inefficiency. This is because of the following:

  • There are often more entities than properties, and page counts (or in the case of #switch, average page counts) are proportional to the number of data items in the data template (if they are stored in a linear way, not in a tree, and not stored as unnamed parameters).
  • In the case of large-scale use of data on one page there are usually one or more tables, where an entity forms a row and a property a column, because there are often more entities than properties, and because this way the sorting feature allows sorting entities based on a property. In this template system this allows producing a row with only one call of the data template, making the count not grow faster than proportional to the average number of data items stored per data template, times the number of entities in the table.

The include part of the data template of an entity does not contain a long list of its sub-entities or their properties, because that would make this method inefficient too.

  1. ↑ It may seem odd, but a template cannot retrieve its own name (PAGENAME only provides this on the template page itself), and even if it could, a string operation would be needed to remove "Data ". Putting the name of the entity in the data template removes the need to supply it as a parameter when the data template is called (in the cases that it would need this name).
  2. ↑ See the first two rows of the first table in m:Help:Array#Summary of counts for template limits.

Until here the documentation is automatically generated by Template:Show data.

References Bản mẫu:Data United States

Area: "Population, Housing Units, Area, and Density: 2010 - United States -- States; and Puerto Rico". 2010 Census Summary File 1. United States Census Bureau. 2010. Truy cập ngày 25 tháng 7 năm 2016. For a detailed breakdown of the figures, see: "State Area Measurements and Internal Point Coordinates". MAF/TIGER database. United States Census Bureau. 2010. Truy cập ngày 25 tháng 7 năm 2016.

Population: "Monthly Population Estimates for the United States: April 1, 2010 to December 1, 2020 (NA-EST2019-01)". U.S. Census Bureau, Population Division. tháng 12 năm 2019. Truy cập ngày 29 tháng 12 năm 2020. Reproduced at the U.S. Census Bureau's U.S. and World Population Clock.

Lấy từ “https://vi.wikipedia.org/w/index.php?title=Bản_mẫu:Data_United_States&oldid=66166941”