Thanks Phil for pointing to this link. I have a follow-up question on this.
Is mean centers of population considered as the population-weighted centroids as many authors described in the methods section (for example, JAMA Network | JAMA Neurology | ACCESS: Acute Cerebrovascular Care in Emergency Stroke Systems ) ?
Thanks.
Arvind
You will have to read it further
to quote
Population information was obtained using data from the US Census Bureau and deliverable addresses from the US Postal Service (Claritus Inc, Ithaca, NY).37,38 Our main geographic units of analysis were block groups. A block group is a geographic unit containing 600 to 3000 people that does not cross state or county boundaries. Each block group's population was assigned a point in space (a centroid) that was nearest to most residents. Population estimates and population-weighted centroids for 208 667 block groups were calculated for 2007 for the entire United States.
Thanks for the reply and quoting the text. So, are population-weighted centroids (described in the paper) similar to mean centers of populations (available at http://www.census.gov/geo/reference/centersofpop.html)?
Another question: Can population-weighted centroids for 'block groups' be calculated from the population estimates of 'block groups'? OR Calculations of population-weighted centroids for 'block groups' need population estimates of 'BLOCKS' instead of 'BLOCK GROUPS'?