APPROACHING DASYMETRIC TECHNIQUE IN MAPPING POPULATION DENSITY - A CASE STUDY OF THUA THIEN HUE PROVINCE

Tóm tắt

The Dasymetric mapping technique approach accurately reflects the population distribution by territory, serving as the basis for urban and living space planning, socio-economic development, and infrastructure. This paper focuses on approaching Dasymetric mapping techniques to create a population density map for Thua Thien Hue Province. By integrating Dasymetric mapping techniques and geographic information system (GIS), component maps have been developed to establish the population density map such as weighted R_A, total population N/ward, E-coefficient, A_T total pixel/ward. The initial results show that the population distribution according to the Dasymetric mapping technique accurately reflects the people living in an administrative unit. Besides, the paper also developed a population density map by traditional density techniques of Choropleth, then compared the results obtained with Dasymetric mapping techniques. From the comparison between the two methods, it reveals that, with the Dasymetric method, the population density of Thua Thien Hue province in 2020 is reality distributed with the highest at 29,26 people/900 m² (0,033 people/km²) and the lowest is 0 (in places where the water surface). Meanwhile, the Choropleth method shows that the most significant population density is 0,01 people/m² (9 people/900 m²), the lowest is 0,02 people/900 m² and is homogeneous for the whole commune/ward territory. Thereby, further confirmed the accuracy, visual representation of population distribution according to the population statistics space of the Dasymetric method.

Keywords: The Dasymectric mapping technique, population density, GIS, Thua Thien Hue