Hi Kaitlin, searched and stumbled onto this post, did you ever finished your 2010 BG mapping project? I am a real estate professional and would love to gain access to what you might have completed. thanks Sunny On Friday, February 24, 2012 9:44:44 PM UTC-8, Kaitlin Duck Sherwood wrote:
> Thanks for the fan post. :-) > > I am planning on adding the 2010 Census information, I just haven't gotten > around to it. I have another hobby project and The Day Job which are > taking priority, but I do expect to get around to putting the 2010 maps up > in the next six months. > > On Wednesday, August 31, 2011 10:40:23 AM UTC-7, Gary wrote: >> >> This might interest you: http://maps.webfoot.com/demos/demographics/ >> I know these are generated tiles, although I'm not sure how, I assume >> it is dynamic since she lets you change the colors. >> It's one of the coolest Google API maps I've seen. >> >> On Aug 30, 6:46 pm, Aaron Kreider <[email protected]> wrote: >> > I want to start a thread for people who are interested in mapping the >> > US 2010 Census Data - for sharing ideas and free data sources. >> > >> > My goal is to make a map of the US that shows Race at the block >> > level. So I'd like to color code areas for the major race groups: >> > black, white, hispanic, asian, and native american. I'm also >> > interested in income data - which is available down to the census >> > tract level. >> > >> > There are several problems trying to do this with Google Maps. These >> > problems include >> > >> > -Census Data set is very large - 200 GB for the entire summary file >> > 1. It'll be smaller if I filter out all the variables I don't need, >> > but it still is going to be huge. >> > >> > -Google Maps has trouble displaying large KML files. I'd like to >> > convert the Tiger Shapefiles (which define the boundaries of census >> > tracts, block groups, etc) into KML. This is probably feasible if I >> > do it for a single state and only down to the census tract level. But >> > if I try to do it for block groups or blocks - it will be harder. >> > >> > -I could generate tiles. But if I want to show blocks on tiles I need >> > to go to zoom level 14 or more. I either need to statically generate >> > a huge number of tiles (to cover the entire US at zoom level 14) or do >> > it dynamically. For generating static tiles I think GMapCreator looks >> > like the best solution: >> http://www.casa.ucl.ac.uk/software/gmapcreator.asp >> > Does around 1000 tiles/minute on my computer. >> > >> > -Census Data is in a hard to use format. The Census Bureau >> > recommends using a Microsoft Access tool to access it. If you do not >> > need the block groups and block level data, an *excellent* resource >> > is:http://census.ire.org/ >> > >> > How can I display block level data? >> > >> > For Census Geographical Areas my guess is there are around >> > -3000 counties >> > -40,000 zip codes >> > -75,000 census tracts (1 per 4000 people) >> > -210,000 block groups >> > -8 million blocks >> > >> > If I were to use KML I think I could display counties for the entire >> > US map, zip codes when zoomed in to the state, census tracts when >> > zoomed into the state (might be slow for big states), block groups >> > when zoomed into a county, and blocks for medium and small counties. >> > To do this I'd need to generate 3000+ KML files (one for each >> > county). Is there a better way? >> > >> > Note: I'm using this county KML file (which you are free to use): >> http://www.energyjustice.net/map/kml/county_boundaries.kml >> > >> > Also: Are there any good Census 2010 data APIs? > > -- You received this message because you are subscribed to the Google Groups "Google Maps API V2" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
