Page 22 - NGTK2018

EXPLANATION OF TERMINOLOGY, CONTENT
AND METHODOLOGY OF SOME STATISTICAL INDICATORS
ON LAND, 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 graph (sensor is a
bi-metal plate) exposed to the air in a meteor bust at altitude 2m away from the
ground, sheltered from direct solar radiation.
• Daily average air temperature is calculated using the simple arithmetic mean
from the results of 4 main observations in the day at 1 a.m., 7 a.m., 13 p.m., 19 p.m. or
from the results of 24 observations at the time of 1 a.m., 2 a.m., 3 a.m.,... 24 p.m. of
the thermometer.

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