Using Data

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Using Data

Finding Available Variables

Here's an example of how to use DataFerret (a Census table-building tool) to lookup variable names and their descriptions on http://dataferrett.census.gov/run.html

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Combining ACS Data with Crime Data

In order to understand how crime or criminal elements are embedded within different communities, it may be useful to combine neighborhood crime data with ACS demographic and housing data. There are hotspots in most cities that could be objectively analyzed to reveal patterns which may be disrupted by governmental policy. That is, if the data clearly points to consistent reliable trends.

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Census Data for Federal Grants

Many federal grants require applicants to supply Census data when responding to RFPs. Allow agencies to create a report template in AFF for applicants. This would allow for applicants to enter an address and get centroid data that was predefined by the agency. Applicants could downloaded the table in PDF form efficiently with all the available data the federal agency requires.

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Census tracts within a radius

I am looking for a way to get the ACS data for a radius around a given point. Using the FCC's API I can get the Census Tract and Block number to use. Does anyone know of a way to get the Census tract numbers say within a 5 mile radius?

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DATE variable in Population Estimates API

Is there any documentation for interpreting the values returned in the DATE variable in the population estimates API?

 

For example, http://api.census.gov/data/2013/pep/natstprc?get=POP,DATE&for=state:25&key=xxxxx returns numerically coded data values (e.g., "1", "6"). I can see by the data that 6 = 2013 but would love to see official documentation somewhere.

 

Thanks!

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How to know what ACS table/field corr to Census 2010

I have a tool (geocoding, etc) that uses Census 2010 data and it puts out a report with '% Minority" and "Total Housing Units" -- how do I know what Census table originates this data ? And : What the corresponding table/field is in ACS ?

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Improving API documentation

Example of easier to follow API documentation: http://developer.usatoday.com/docs/read/Census Versus no coded variable definitions on the page: https://www.census.gov/developers/data/ All the needed content is in this presentation, but it was not intuitive to click on it since it refers to a specific event: https://www.census.gov/developers/NDoCH_Support_Slides.pdf Maybe rename it "ACS API Handbook"? Great great ...more »

Submitted by (@lilybradley)
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No 'Access-Control-Allow-Origin' header is present on the reques

Hi, I had a little app working until just two days ago, when I started receiving a CORS error: "No 'Access-Control-Allow-Origin' header is present on the requested resource". I tried adding the jsonp callback to no avail. I am able to access the generated url via the browser. What I am doing is generating state options for a select list. The offending function, getStateList(), can be seen at: https://github.com/Code-for-Miami/iam1of.us/blob/master/js/script.js#L97 ...more »

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All Tracts in a MSA

Is it possible to get all tracts within a MSA, as in (an attempt to get all tracts in the DC metro):

 

http://api.census.gov/data/2011/acs5?key=mykey&get=B00001_001E&for=tract:*&in=metropolitan+statistical+area/micropolitan+statistical+area:47900

 

This returns:

"error: unknown/unsupported geography heirarchy"

 

If not this would be useful!

Submitted by (@seth.spielman)
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API Query Dissection

A dissection of the API query string for the Census API I have posted this in another topic, however it is hard to find. Host name, API sub-folder (this triggers our api to parse the following data). http://api.census.gov/data/ This portion refers to the DataSet/Instance pair (without both, it's difficult to determine what number you want back) 2010/sf1? This determines what variables to retrieve (required, ...more »

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Census Data Acquisition from Boundary Files

On this site: https://sites.google.com/site/stephaniesmullen/google-map-examples/census-data-acquisition the author uses census boundary files to get coordinates of points that make up the boundary of a polygon. When I tried to do the same thing with boundary files of block groups from the 2010 census for California. One of the files contents was in hex format and the block groups arrangement of polygon data ...more »

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Getting null from ACS block-group query

For ACS data - is there a way to tell which codes are valid for tracts vs block group? Some codes work for both, some return "null" when the block-group level is queried. For example, the following url works for the tract level: http://api.census.gov/data/2010/acs5?key=4be82289939444f20513cd7c3c3eafb42e0d9ccf&get=B06007_003E,NAME&for=tract:*&in=state:08+county:059 But using the same code, it returns null for the ...more »

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