A procedure of systematically acquiring and recording information about all the members of a given population.

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3
votes
4answers
4k views

Free api to reverse geocode latitude, longitude to census tract?

I have a bunch of latitude,longitude coordinates (mostly city/town centroids) in the United States for which I'd like to find the containing census tract. For instance, input => nn.nnn, -nn.nnn ...
4
votes
2answers
800 views

What is the highest resolution of population density data that I can obtain for USA freely?

Ok so as far as my understanding goes the most high resolution dataset available that factors in many other things (other than Census data ) at a 1X1 km resolution is Landscan data created by Oak ...
2
votes
2answers
767 views

Gathering data for a large number of census block groups

I would like to collect some census data for every block group in New England. I'm primarily interested in median income and median age, and ideally I'd like a large .csv file with one row per census ...
6
votes
1answer
3k views

What does the code RTTYP represent in the USA Tiger road files?

I'm trying to figure out what a particular code represents in the US Census Tiger Line files for roads. I downloaded roads for the US from here. I've searched the documentation (link to large pdf) and ...
11
votes
2answers
3k views

Bulk lookup of address census tract and block

Is there a free or cheap way to code a large number of addresses and return or append the census tract and block data? There are a number of ways to geocode an address and get the lat long, but I ...
6
votes
3answers
818 views

How to convert factfinder2.census.gov map data to KML?

I've downloaded a map from http://factfinder2.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=DEC_10_SF1_P1 (limited to San Francisco census tracts), and I'd like to convert it to KML ...
5
votes
2answers
1k views

US Tiger or Open Street Map Route Data: One Way Street & Intersection Data

We're building a U.S. street routing application (finding paths for cars between two or more locations using public roads) and would like to use open source data US Tiger Data or Open Street Map or ...
6
votes
2answers
1k views

Using the US census to analyze data nationally

I'm trying to make a table to relate the STFID and LOGRECNO values for the US 2000 census at the block group level, nationally. I realize that the LOGRECNO value is a state specific unique variable, ...
6
votes
1answer
745 views

Help using the US American Community Survey Data

I want to use the USA American Community Survey Data for spatial analysis, but I'm having difficulty understanding how the survey tables are constructed so that I can relate them to block-group ...
1
vote
3answers
840 views

How to match Census Block Groups from different decades to show percent change?

I know for Census Tracts and Blocks there are Relationship files, but what is the best way to match Census Block Groups from different decades to compare change?
10
votes
7answers
9k views

Where can I find a shapefile of city boundaries in the US?

Where can I find a shapefile that contains boundaries for the major cities in the United States? I have tried the census website but could not find anything.
5
votes
3answers
2k views

2010 Census Tiger County shp file with defined coastal land area

I am looking for a 2010 Census Tiger Shape file that hugs the coastline and doesn't include the ocean in county boundaries. I have a pre 2010 file that did this and I can't seem to find a 2010 ...
18
votes
7answers
11k views

Where to get 2010 Census Block data?

This might be a stupid question but I would like to download 2010 Census Block Data for several towns and I can't seem to find it on American Factfinder. Is it there? And if not, does anyone know ...
5
votes
4answers
1k views

What is a best practice way to display/feed US census/tiger data into Google Maps API?

Let's say I want to display age, income, etc based on census block groups on Google maps. What is the best practice or recommended way to do so and also to allow to do simple queries?
3
votes
1answer
180 views

Get points in point file to write into new field the census tract each is in (from another shapefile)

I have points that represent day care centers which have address and lat-long. I am using lat-long to display. Now I need to sort, count, etc. these points in conjunction with new census data. To be ...
2
votes
1answer
126 views

Where is the pdf of the US Census data stored that contains all the codes?

I'm working with US census data and I can't locate the documentation that explains all of the codes (e.g. P01001 etc) that is used to describe the attribute tables in the shapefiles. I haven't been ...
9
votes
2answers
404 views

How would one geocode historical US census records?

I want to geocode census records from the U.S. Here is one example from 1870. This particular census page is from the 6th election district, 8th ward of New York County. Here's one from the 1910 ...
1
vote
3answers
8k views

How to calculate Raster Area per Polygon?

In ArcMap, I have a raster file that contains 6 classes of landcover and a shapefile that is the census data (OA boundaries and their population). I want the area of each class in each OA? For ...