New answers tagged census
Just to add the National Historical Geographic Information System (NHGIS) to the list. It provides, free of charge, aggregate census data and GIS-compatible boundary files for the United States, currently between 1790 and 2012. For Data availability see here.
You can get block and block group census data at: http://www.census.gov/2010census/popmap/ Have to dig into the system a bit, but good data available.
Census.gov ->geography-> tiger data-> choose 2010 then use Web interface to download what you need, that is for shape files, for demographics you need to use the fact finder also on census website
Check if the data loaded successfully (sometimes a lot of census FTP dowloads fail and the load will continue. You won't know unless you captured that error log and check it). I just ran this query and geocodes perfectly using TIGER 2013. SELECT g.rating, ST_X(g.geomout) As lon, ST_Y(g.geomout) As lat, (addy).address As stno, (addy).streetname As street, ...
I just read an article about a new... app? created by the USGS, called the Historical Topographic Map Explorer. You can search or pan, click on the map, and it will show a timeline at the bottom listing the date of all available maps. The oldest for Miami seems to be 1950 though. Another source mentioned in several answers elsewhere on this site is the ...
You are actually asking two questions. One is how to merge census data to your shape file. This is not very difficult, you may want to check out merge or spCbind, or this answer. It hard to say without knowing the structure of your data. The second question is about how to do the weighted sampling. I have a suggestion below that uses spsample from the sp ...
You can download administrative shapefiles from here. Simply select Russia as your Country and Administrative areas as your Subject. You will receive 3 shapefiles of differing administrative levels so you can choose what level you would like. Here is are some attributes for the lowest level: Hope this helps.
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