Question
I have a faculty member preparing a brief for City Council regarding a proposed heritage designation for a small downtown neighbourhood in Halifax, consisting of Dissemination Blocks 12090855009, 12090854004, 12090854003 and 12090965001. He is looking for any data that may show the array of incomes within this small area, which he hypothesizes to be a very wide spread (from poor students to wealthy homeowners).
We have some data of this sort, from the NHS 2011, at the level of Dissemination Areas, but, as always, the smaller DB geography is needed if possible. I’ve also found household income ranges by postal routes, but postal route geography is also larger than the dissemination blocks that constitute this neighbourhood.
Is there any way in which income data (households or individuals, averages, medians, etc.) at the level of these DBs might be made available to a client?
Response
According to the 2016 Census Dictionary: Only population and dwelling counts are disseminated at the dissemination block level (with the dissemination area being the smallest standard geographic area for which characteristic data are disseminated). The Chief from the Tax Section of ISD confirmed that the 2 possible geographic options using tax data would be the DA or postal code.
Furthermore, the Data Quality and Confidentiality Standard and Guidelines for the 2011 NHS states that income data is suppressed when an area has a population less than 250 or the number of private households is less than 40.
I’m currently checking with the regional office to confirm that by combining DB’s together both the population and household requirements are met so they should be able to get the information that you’re looking for.
Showing posts with label Dissemination block level data. Show all posts
Showing posts with label Dissemination block level data. Show all posts
Tuesday, July 4, 2017
Wednesday, January 26, 2011
Dissemination Block-Level Data
Question
Can someone please help clarify access to dissemination block level data for the 2006 Census?
I know we have access through GeoSuite (and Geosearch) to population and dwelling counts at the DB level; however, I have a researcher who is looking for characteristic (profile) data at the DB level. I know through DLI we only get profile files down to DA.
The following STC page (http://www12.statcan.gc.ca/census-recensement/2006/ref/dict/geo014a-eng.cfm) explains that only population and dwelling counts are disseminated at the DB level.
I am assuming DB data exists though and can be requested; however, would this constitute a custom tab or an RDC request? Does it depend on whether it’s used for analytical vs. descriptive services.
Thanks in advance for any help.
Answer
You are correct, the dissemination area (DA) is the lowest level of geography for which census data are available through the DLI.
Dissemination block level data can however be requested on a custom basis for a fee. Based on previous inquiries about data at the block level, it is my understanding that areas of interest need to have a minimum population of 100 when no income data are requested and a minimum population threshold of 250 for data with income characteristics. Other confidentiality and suppression rules may also apply. I would be happy to refer you to an Account Executive who can provide additional information about this type of custom product and confirm if the specific data your researcher needs are available and at what cost if he/she is interested in custom 2006 Census products.
With regards to the availability of block level data through the RDCs, I have asked our census contacts to confirm if one could use the the 2006 Census microdata file (RDC) to access data at this level and will send you additional information about this as soon as I receive their answer. I couldn't find a block level geography variable in the codebook for the 2006 Census RDC file but have asked our Census contacts to advise and confirm. For your reference, a copy of this codebook is available at: http://www.statcan.gc.ca/dli-ild/meta/census-recensement/2006/rdc-codebook-public-2006-ver2-cdr-manuel-des-codes.pdf The RDC application process and guidelines are described at: http://www.statcan.gc.ca/rdc-cdr/process-eng.htm
Additional Information
I have received confirmation that the 2006 Census microdata file that is available through the RDCs only goes down to the Census Tract level. Block level data would therefore only be available on a custom basis. If your client wishes to look into this option, I will refer you to an Account-Executive in the Toronto regional office.
Can someone please help clarify access to dissemination block level data for the 2006 Census?
I know we have access through GeoSuite (and Geosearch) to population and dwelling counts at the DB level; however, I have a researcher who is looking for characteristic (profile) data at the DB level. I know through DLI we only get profile files down to DA.
The following STC page (http://www12.statcan.gc.ca/census-recensement/2006/ref/dict/geo014a-eng.cfm) explains that only population and dwelling counts are disseminated at the DB level.
I am assuming DB data exists though and can be requested; however, would this constitute a custom tab or an RDC request? Does it depend on whether it’s used for analytical vs. descriptive services.
Thanks in advance for any help.
Answer
You are correct, the dissemination area (DA) is the lowest level of geography for which census data are available through the DLI.
Dissemination block level data can however be requested on a custom basis for a fee. Based on previous inquiries about data at the block level, it is my understanding that areas of interest need to have a minimum population of 100 when no income data are requested and a minimum population threshold of 250 for data with income characteristics. Other confidentiality and suppression rules may also apply. I would be happy to refer you to an Account Executive who can provide additional information about this type of custom product and confirm if the specific data your researcher needs are available and at what cost if he/she is interested in custom 2006 Census products.
With regards to the availability of block level data through the RDCs, I have asked our census contacts to confirm if one could use the the 2006 Census microdata file (RDC) to access data at this level and will send you additional information about this as soon as I receive their answer. I couldn't find a block level geography variable in the codebook for the 2006 Census RDC file but have asked our Census contacts to advise and confirm. For your reference, a copy of this codebook is available at: http://www.statcan.gc.ca/dli-ild/meta/census-recensement/2006/rdc-codebook-public-2006-ver2-cdr-manuel-des-codes.pdf The RDC application process and guidelines are described at: http://www.statcan.gc.ca/rdc-cdr/process-eng.htm
Additional Information
I have received confirmation that the 2006 Census microdata file that is available through the RDCs only goes down to the Census Tract level. Block level data would therefore only be available on a custom basis. If your client wishes to look into this option, I will refer you to an Account-Executive in the Toronto regional office.
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