The changing structure of a city:  temporal changes in cubic spline urban density patterns.
"Using the basic summary of urban structure given by the population density function, this paper estimates changes which have occurred in the structure of the Detroit [Michigan] metropolitan area during the past two decades.  Both overall density changes and direction-specific changes are estimated using census data and the method of cubic spline regression.  The results give more revealing insight into the structural changes which have occurred in the city than has been possible with traditional models of urban population density."
Anderson
J E
JE
D000569:Americas; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D005843:Geography; D008824:Michigan; D009656:North America; D011153:Population; D011154:Population Characteristics; D011156:Population Density; D013223:Statistics as Topic; D014481:United States; D014505:Urban Population
Americas; Demographic Factors; Developed Countries; Developing Countries; Estimation Technics; Geographic Factors; Michigan; North America; Northern America; Population; Population Characteristics; Population Density--changes; Research Report; Spatial Distribution--changes; United States; Urban Population--changes; Urban Spatial Distribution--changes