Page 27 - Niên giám 2021

EXPLAINING OF TERMININOLOGY, CONTENT
AND METHODOLOGY OF SOME STATISTICAL INDICATORS

OF LAND AND CLIMATE

LAND
Total land area of an administration unit is the aggregate area of all
types of land within the boundary line of each administration unit which is
determined in accordance with the provisions of law.
Agriculture production land is the land used in agricultural production,
including annual crop land and perennial crop land.
Forestry land is the land under forests (including natural forests and
planted forests) that meet the forest standards prescribed by the legislation on
forest protection and development, and newly planted forestor plantation forest
in combination with natural farming.
Specially used land includes land for offices of the State agencies, land
for construction of for-profit facilities; land for security and national defense
purposes; land for non-agricultural production and business, and land used for
public purposes.
Residential land is the land used for construction of houses and facilities
for living activities; garden and pond attached to house in the same residential
land plot (including garden and pond attached to detached house) which is
recognized as residential land. It includes residential land in rural areas,
residential land in urban areas.
Unused land includes all categories of land of which the purposes of use
have not been yet determined, including unused plain land; unused hilly land;
rocky mountains without forests.

CLIMATE
Average air temperature in months is the average of average air
temperature of days in the month.

Average air temperature in year is the average of average air
temperature of days in the year.

• Air temperature is measured by normal thermometer, maximum
thermometer (mercury), minimum thermometer (alcohol liquid) and thermo

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