Monday, October 1, 2018

1976 Boundary Files

Question:
I’m trying to track down 1976 CSD and CD boundary files for a researcher here at WLU. Do they exist? Is so, can some one point me in the direction of them? If they don’t exist, does anyone have the backstory on why digitization for this vintage never occurred?

Answer from DLI list:
[There is] a project at UofT to digitize historical census boundary files, in parallel with the OCUL-DATA Historical Census Project.

I am working with a student to create geospatial files for all the census boundaries – going back as far as we can. I believe he has just completed the prairie provinces for 1976.

The digitized maps are available through the Internet Archive – does your researcher need the geo-data or just the pdfs?

Answer from Subject Matter:
We received the following response from subject matter:

“Unfortunately, we do not have CSD/CD boundary files for 1976. We aren’t certain as to why this year was never digitized, however, some thoughts about it are:

— not everything was mapped in the 1970s, and thus there may not have been maps to digitize
— what was mapped tended to be skeletal road networks, and only in the larger population centres, so CD/CSD boundaries may not have existed on any maps
— mapping tended to be more for collection purposes rather than dissemination, so what exists is more for Enumeration Areas, not CD/CSDs, and again only in larger areas
— likely there have not been the financial or human resources to do this work, as Geo’s efforts are usually geared to future censuses, rather than capturing data from past censuses
— most of the older historical information that does exist in a digital format is not readily converted to shapefile or other spatial formats. As in they are old, mainframe files which need to be examined to see if we could even capture the data they contain.

There certainly is a lot of historical information available, but these specific boundaries do not exist in a digital format as of today.”

Clarification on GSS PUMF Cycle 30 Update

Question:
I have a question about this new data release.


If the ASCII data hasn’t changed, nor the SAS, SPSS and Stata code which are presumably used to generate the .sas7bdat, .sav and .dta files, how are the new files different from the old? Is there a changelog available so that users of these files can see any differences?

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Data Release Info
Please note that the GSS PUMF Cycle 30 was updated. The update is only applicable to the English SPSS, SAS, and STATA data files.

The two primary objectives of the General Social Survey (GSS) are to gather data on social trends in order to monitor changes in the living conditions and well being of Canadians over time; and to provide information on specific social policy issues of current or emerging interest. 

The mandate of the GSS "Canadians at Work and Home" is to explore people's views about work, home, leisure and well-being, and the relationships between these. Data from this survey will help decision makers select the programs and policies that will best serve Canadians.

EFT: /MAD_PUMF_FMGD_DAM/Root/5221_GSS-CWH_ESG-CTM/cycle30-2016/

Should you have any questions, please do not hesitate to contact us.

Thank you.
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Answer:

The re-issue was due to issues with the programs that we were using the stage the data that resulted in certain variables in the English datasets being marked as system missing rather than valid frequencies.

Historically we haven't provided a changelog detailing these items, but I'll bring up the idea of a changelog to the rest of the DLI team to see if we can include one for future releases. Thank you for the idea!

Population of Niagara-on-the-Lake over several decades

Question:
I have this request below and was able to find the results in the different datasets over the years but was hoping there would be one dataset that would have all the figures.

“The student is looking for the total population of Niagara-on-the-Lake (census subdivision) over a few decades, let’s say 1976-2016 (40 years) at minimum, a population count every 5 years is fine. Is it possible to find one table on Statistics Canada’s website that shows this data?”


Can anyone help?

Answer:
Subject matter has informed us that we unfortunately do not have the requested data in one table. It could, however, be possible to fulfill this request through a custom tabulation. I have sent the request to the regional office responsible. I will relay the feasibility, cost and time estimates once we receive a response. 

Monday, September 17, 2018

Access to CCHS Diabetes Counts & Frequencies

Question:
I have a researcher who interested in doing provincial comparative analysis on diabetes prevalence between First Nations and the general population using the CCHS.

She obtained an excerpt from the CCHS 2015-2016 data dictionary which contains the variable SDC_016A (Are you First Nations, Metis or Inuk?)  and is interested in acquiring either the counts or frequencies of First Nations respondents by province.

Initially I’d referred her to the 2013-2014 CCHS which is the most recent release but she reported and I confirmed this information is not in there.

I suspect this won’t be included in the 2015-2016 release either due to low counts.

Can she get this information via the RDC? If not, are there recommendations for alternative data sources?

Answer:
We have received the following response from subject matter regarding your inquiry:

“The researcher should be made aware that “Excluded from the survey's coverage are: persons living on reserves and other Aboriginal settlements in the provinces”. Those answers are only available on the master file.”

“The researcher can request access to the 2015-2016 CCHS data through the RDC where they will be able to look at the raw counts.

We are not able to provide raw counts but after looking at the frequencies for 2015-2016, by combining First nation, Métis and Inuit that have been diagnosed with diabetes, estimates in PEI, New-Brunswick or Yukon will not be releasable due to low frequencies (less than 10 respondents).

A suggestion for the researcher could be to combine 4 years of data (2011 to 2014) to have enough sample to be able to do a provincial comparative analysis. This could be achieved through the RDC proposal.

The CCHS annual component was redesigned for the 2015 reference period and onward cycles.  Please note that as a result of the changes from the 2015 CCHS redesign, combining cycles of CCHS data from before and after the redesign (e.g., combining 2014 (and earlier files) with 2015 annual files) is not recommended, and caution should be taken when comparing estimates across those years.

Please be aware that the CCHS survey coverage excludes persons living on reserves and other Aboriginal settlements in the province.”

The CCHS team did inform us that a custom request (at cost) is possible based upon the requirements you’ve provided. If you would like to proceed with this option, please let us know.

Friday, September 14, 2018

PUMF for NLSCY

Question:
I have a researcher who is looking for data from the National Longitudinal Survey of Children and Youth. The most recent PUMF in Nesstar is 1998-99. Is this the most recent one available?

Answer:
Subject matter has confirmed that PUMFs were discontinued after cycle 3 as it was too difficult to produce a PUMF that provides enough analytical information while maintaining confidentiality. Therefore, none were produced and there are no plans to develop any.

Thursday, September 13, 2018

Enumeration of Dissemination Areas

Question:
I had a question regarding the method and coverage for enumerating of institutional bldgs in DAs.

“I know that when enumeration for the census is completed, institutional buildings are done separately. There are a few buildings in xxx that are owned/run by social housing providers. The data for those people would still be included in the overall population data for the DA, correct?”

My answer to this client would be yes – they are correct.

I looked on the DA definitions page and did not find anything to indicate otherwise.

https://www12.statcan.gc.ca/census-recensement/2016/ref/dict/geo021-eng.cfm

Am I correct?

Answer:
You are correct! In the Census profile for the area in question, the individuals in institutional dwellings of that area will be included in the population counts. This will differ for our data tables, however, since the tables are normally produced for individuals in private households of occupied private dwellings.

Wednesday, September 12, 2018

Canadian Community Health Survey (CCHS) 2015 PUMF Release Date

Question:
Do we think the CCHS PUMF for 2015-16 will be released this month?  Keen researchers are looking forward to it.

Answer:
The Canadian Community Health Survey (CCHS) – Annual Component 2015-2016 PUMF is expected to be released sometime in November 2018.

More information about the tentative release date of DLI products can be found on the following webpage: http://www.statcan.gc.ca/eng/dli/prod_date.