Identification

Title

Intermediate Zone Centroids 2001

Alternative title(s)

Intermediate Geography Centroids 2001

Abstract

Intermediate zone centroids are point features that represent the population weighted centre of intermediate zones - the geography used for the dissemination of results from Scottish Neighbourhood Statistics (SNS) that unsuitable for release at data zone level. Centroids were calculated from a population weighted sum of data zone centroids that fall within an intermediate zone. Eastings and northings for each data zone were multiplied by their population, summed based upon the intermediate zone in which they fell, and then divided by the total population of the intermediate zone. These centroids are in turn used to link intermediate zones to other (higher) geographies via a spatial join, producing a 'best-fit' match between intermediate zones and other SNS geographies. There are 1,235 intermediate zones across Scotland, and each have been assigned an individual code that follows the Scottish Government's standard naming and coding convention. The code prefix is S02, which has been assigned to designate intermediate zones. In most cases, intermediate zones were also been assigned a name by the relevant Community Planning Partnership. From time to time Local Authorities may choose to update these names, and this dataset will be updated to reflect these changes.

Resource type

dataset

Resource locator

https://maps.gov.scot/server/services/ScotGov/StatisticalUnits/MapServer/WMSServer?

protocol: OGC:WMS

name: IntermediateZoneCent2001

description: OGC View Service

function: information

https://maps.gov.scot/server/services/ScotGov/StatisticalUnits/MapServer/WFSServer?

protocol: OGC:WFS

name: SU:IntermediateZoneCent2001

description: OGC Feature Download

function: download

https://maps.gov.scot/server/rest/services/ScotGov/StatisticalUnits/MapServer/7

protocol: WWW:LINK-1.0-http--link

name: Intermediate Zone Centroids 2001

description: ESRI REST Service

function: download

https://maps.gov.scot/ATOM/shapefiles/SG_IntermediateZoneCent_2001.zip

protocol: WWW:DOWNLOAD-1.0-http--download

name: Intermediate Zone Centroids 2001

description: ESRI Shapefile Download

function: download

Unique resource identifier

code

SG_IntermediateZone_Cent_2001

codeSpace

www.gov.scot

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Additional information source

Classification of spatial data and services

Topic category

location

society

Keywords

Keyword set

keyword value

Statistical units

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

population distribution

statistical data

originating controlled vocabulary

title

GEMET - Concepts, version 2.4

reference date

date type

publication

effective date

2010-01-13

Keyword set

keyword value

Statistical analysis

originating controlled vocabulary

title

IPSV Subjects List

reference date

date type

publication

effective date

2020-11-18

Geographic location

West bounding longitude

-8.80

East bounding longitude

-0.71

North bounding latitude

60.87

South bounding latitude

54.63

Extent

Extent group

authority code

code identifying the extent

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2005-02-01

Frequency of update

notPlanned

Quality and validity

Lineage

Centroids for intermediate zones were originally created by the Scottish Executive's Geographic Information Service (SEGIS, now the Scottish Government's Geographic Information Science and Analysis Team, GI-SAT) in order to provide a way to link intermediate zones to other (higher) geographic boundaries used by Scottish Neighbourhood Statistics and the wider Scottish Government community. Intermediate zone centroids do not represent the geometric centre of the feature, but rather the population weighted centre. These points were generated using the easting, northing and populations of each data zone included within the intermediate zone. The method used to calculate the centroids is the same as that applied to data zones and is outlined below: 1) The easting of each data zone in the intermediate zone was multiplied by it's population, and then the northing of each of data zone by it's population. 2) The results for all easting and northing for each data zone were then added together (based upon the intermediate zone that they are in) to get a total easting and total northing for each intermediate zone. 3) The average easting and northing was calculated by dividing the totals for easting and northing by the total population (of the intermediate zone). 4) Lastly, the distance from each of the data zone centroids to the average easting/northing was calculated. This was solved using the Pythagoras' Theorem, wherein the distance equals the square root of the difference in easting coordinates squared plus the difference in northing coordinates squared. Each data zone easting was subtracted from the average easting, and in the case of negative results, multiplied by -1 to obtain a positive number. The same procedure was used to calculate the difference in northing coordinates. The data zone coordinate pair with the shortest distance to the average was chosen to represent the centroid of the intermediate zone, deemed to be the closest to the population centre. The dataset is managed by the Scottish Government's Geographic Information Science and Analysis Team (GI-SAT), who carry out any required updates at the request of the Office of the Chief Statistician (OCS).

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

Data format

name of format

WMS

version of format

1.3.0

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

The following attribution statement must be used to acknowledge the source of the information: Copyright Scottish Government, contains Ordnance Survey data © Crown copyright and database right (insert year)

Responsible organisations

Responsible party

contact position

Geographic Information Science and Analysis Team

organisation name

Scottish Government

full postal address

Victoria Quay

Edinburgh

EH6 6QQ

United Kingdom

email address

GI-SAT@gov.scot

responsible party role

publisher

Responsible party

contact position

Data, Statistics and Outcomes

organisation name

Scottish Government

full postal address

St Andrews House, Regent Road

Edinburgh

EH1 3DG

United Kingdom

email address

neighbourhood.statistics@gov.scot

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

contact position

Geographic Information Science and Analysis Team

organisation name

Scottish Government

full postal address

Victoria Quay

Edinburgh

EH6 6QQ

United Kingdom

email address

GI-SAT@gov.scot

responsible party role

pointOfContact

Metadata date

2021-01-18T16:20:10

Metadata language

eng