Missing option for BlockGroups for ACS?

[stuartlynn]

Trying to get Block Group geometries for the ACS through the products API but it looks as if there is only counties and tracts available just now. Is there a reason for that or has it just now been implemented yet?

https://github.com/cenpy-devs/cenpy/blob/master/cenpy/products.py#L676

[ljwolf]

Should be possible. Need to check/test, but that would involve:

1. registering the block group layer
2. adding a query closure to the metaclass that looks just like block but for blockgroup.

I know its feasible, I just didn't add it to this release because of testing & large numbers of empties.

[stuartlynn]

Happy to take a stab at it.

[dfolch]

I was looking for block groups yesterday and came across this issue. A minor issue is the name that should be used in the cenpy API ("bg", "block group", "blockgroup", etc.); the census API uses "block group".

There are a lot of empty cells as @ljwolf notes. Also missing (or hard to find) years:

• 2009 data can be found in the summary file

In [48]: conn = cenpy.products.APIConnection("ACSSF5Y2009")                                                                                     

In [49]: data = conn.query(["B01001_001E"], geo_unit = 'block group', geo_filter = {"state": "04","county": "019"})

• I can't find 2010, 2011 or 2012

• 2013 (and onward) data can be found in the detailed tables

In [62]: conn = cenpy.products.APIConnection("ACSDT5Y2013")                                                                                     

In [63]: data = conn.query(["B01001_001E"], geo_unit = 'block group', geo_filter = {"state": "04","county": "019"})