I have population data (inhabitants per city and year) of 31 cities of the DR Congo for the years 1960, 1970, 1980 and 1990. I want to interpolate the population of all cities for the year 1990, to estimate the growth of them in order to locate the sites that will minimize the competition for resources.
I have used an IDW and a layer of existing lakes as a barrier. However, it seems to me that the resulting layer does not have sense, and so I would like to ask if IDW is the best interpolation tool for my data or it will be better to use other, such as Kriging.
I have to create a protected area in the DR Congo, so I want to estimate the possible growth of the cities in order to find the more suitable place to avoid competition for space and resources.