In January 2015 ONS held a 2011 Census Outputs Evaluation workshop at City Hall, London. The meeting was an opportunity for reprsentatives from local authorities, business, academic and third sector Census users to feedback their experiences from 2011 to the Census Offices. Each sector presented their opinion of what ‘went well’ and what lessons need to be learnt for 2021. All the slides and a report (.pdf) from the day have now been published on the ONS website.
Callum Foster also shared some of ONS’ early thoughts on the potential data delivery channels we can expect following 2021:
Callum’s slides can be downloaded here (1MB .ppt)
The ability to aggregate small area data into larger zones is a particularly valuable tool when working with origin-destination datasets.
In order to help users complete rezoning tasks we have created a bank of 63 Gazetteer Files. The files can be used to rezone standard geographies in England & Wales, Northern Ireland or Scotland. In addition we have also created an Excel-based tool which allows users to combine these files to create their own UK-wide gazetteer files.
The Gazetteer files, Gaz Compiler Tool and instruction document can be downloaded here:
GAZ Compiler (zip file, 5Mb).
Information on how to use gazetteer files in SASPAC can be found in Module 4b of the Training Manual.
2011 Census Safeguarded flow datasets have begun to be released by ONS and are now available in SASPAC. Currently 15 tables have been published via the UK Data Service, with further tables expected throughout Feb/March. Tables currently available include data on:
- Output Area to Workplace zone flow counts
- MSOA/Intermediate zone worker flows by age, sex and mode of travel
- Output Area to Output Area migrant flow counts
- ward to ward migrants flows by age groups and sex
A list of tables currently published is here (.xls).
Flow datasets are available under three levels of licence: Public, Safeguarded and Secure:
- Public – open and accessible like any other Census data (downloadable in SASPAC from here)
- Safeguarded – available to public sector and academic users to download in a SASPAC format from the UK Data Service – requires users to sign up to additional t&cs.
- Secure – available within the ONS Virtual Microdata Laboratory (VML) to Approved Researchers for specific projects – SASPAC is available in this environment.
Instructions on how to access the SASPAC data via these channels is explained in the attached guidance note (.pdf) along with important information regarding the End User Licence. Importantly, and unlike the majority of Census outputs, this licence has two specific conditions:
- data is licensed on an individual basis (not an organisation), so users are required to ensure only licensed individuals can access the Safeguarded data files.
- Users are also required to suppress any counts lower then 3 or replace 1s or 2s with 0 or 3.
SASPAC v9.93 is required to access these tables and more details on this dataset are available on our dedicated flow data page.
To support access to these datasets we are running a series of training courses specialising in flow data – a programme for the day is here (.pdf) and dates here. Flow data training materials and videos are also available.
SASPAC v9.93 is now available to download to our all users, this includes:
- Scottish Census releases I, j and k (41 DC and 43 LC tables)
- 2011 ONS Flow data: Public and Safeguarded*
- 2013 Mid-Year Population estimates (single year of age by sex for OAs and higher geographies)
*The first Safeguarded OD tables have begun to be released via the UK Data Service: 8 migration tables relating to OAs and merged ward geographies were released on 3/12/14. There is a plan to publish around 200 tables via this route between January-March next year. Remember there are additional terms and conditions regarding the use of these statistics and we will be providing more details in a blog post soon.
A release note with update instructions can be found here, whilst the relevant SASPAC System files for E&W can be found here and the Scottish data here.
NRS have recently published the new 2011 Census Data zones and Intermediate zones areas – previously Census data has been published for 2001 DZ/IZ on a best-fit basis. The 2011 lookup tables are available to download from the NRS website.
These zones have been created by aggregating 2011 Census Output Areas (on an exact-fit basis). The SASPAC team have created Key Statistics, Quick Statistics and Local Characteristic datasets for these new zones and the System files are now available for download from our data page or a direct link to the System files is here (743MB .zip).
Data has been generated using SASPAC’s rezoning facility – remember you can create your own custom areas and all the steps are explained in Module 4b. When viewing these new geographies in SASPAC the zones will appear as flat trees (i.e not grouped by LAs), we are currently updating the software to incorporate these hierarchies and a software release will be available shortly.
Following users’ concerns over unusual flows in the 2011 Workplace tables released at the end of July (i.e. flows between LAs with large distances between them), ONS have investigated the issue and discovered errors in the coded workplace addresses. There is no plan to re-release these tables but a quality report (pdf) is now available which explains the issues and areas effected.
Today ONS updated the timetable for the publication of the 2011 Census flow data. These datasets relate to:
- Travel to Work (or study in Scotland)
- Second Residences
- Student migration
The next data to be published will be four Safeguarded migration tables including:
- OA to OA/country flow (counts)
- ward to ward flows by sex and age
These are expected to be available later this month, with the Secure tables coming in November and safeguarded tables in December.
All Safeguarded tables will be available in SASPAC and users will be able to download the System Files from the UKDS website directly (having registered and accepted the T&Cs).
All Secure flow tables will only be accessible to approved researchers via the ONS secure VML (Virtual Microdata Laboratory). SASPAC will be available in the VML to allow our users to integrate these datatsets.
More details on the flow data, including table layouts, can be found on the ONS website and details of SASPAC’s specialist OD training courses here.