Question

analyse the relationship between the population density and geographical condition of a particular area

Answer 1

Population density that indicates a critical point in population growth is able to estimate from the relationship between population density and population movement. In the case of adopting usual definition of population density, the critical point depends on how to divide the space into unit of measurement. We find proper definition of population density. There are both inhabitable and uninhabitable areas. For population density adjusted by the size of the inhabitable area without agricultural land, the critical population density does not depend on the unit of measurement. We observe this statistical characteristic from detailed Japanese census data and land use data.

Answer 2

If the geographical condition of a particular area is suitable for people to live, then the population density will be high.
For example: if it is plain, good water supply, other things.... people can survive and live there in a better way