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== Metadata Guidelines for Geospatial Data Resources Part 2 | ||
= Metadata Guidelines for Geospatial Data Resources Part 2 | ||
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include::./includes/attributes.asciidoc[] | ||
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=== Creating metadata using UK GEMINI (v2.3) May 2018 -{nbsp}_being revised_ | ||
Creating metadata using UK GEMINI (v2.3) May 2018 -{nbsp}_being revised_ | ||
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Return | ||
to{nbsp}https://www.agi.org.uk/gemini/40-gemini/1037-uk-gemini-standard-and-inspire-implementing-rules[GEMINI | ||
2.3 home page] | ||
Return to link:1037-uk-gemini-standard-and-inspire-implementing-rules[GEMINI 2.3 home page] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#Intro[1. | ||
Introduction] | ||
:sectnums: | ||
:sectnumlevels: 3 | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#gemini[2. | ||
GEMINI2] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#2.1[2.1 | ||
Metadata elements] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#2.2[2.2 | ||
Additional metadata elements] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#2.3[2.3 | ||
Extension code lists] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#errors[3. | ||
Possible metadata errors] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#3.1[3.1 | ||
Impact of metadata errors] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#3.2[3.2 | ||
Effect on searches] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#3.3[3.3 | ||
Prevention and correction of errors] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#3.4[3.4 | ||
Common errors] | ||
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#guidance[4. | ||
Guidance for individual metadata elements] | ||
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=== Preface | ||
*Preface* | ||
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This is the second part of a set of guidelines for metadata for | ||
geospatial data resources. These metadata guidelines are primarily | ||
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@@ -59,11 +27,10 @@ providers of metadata services and general data users. They include | |
guidance on quality management such that they could be used in the | ||
context of a national metadata service. | ||
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https://www.agi.org.uk/gemini/40-gemini/1052-metadata-guidelines-for-geospatial-data-resources-part-1[Part | ||
1 of the Guidelines{nbsp}]covers the basics of metadata and provides an | ||
link:1052-metadata-guidelines-for-geospatial-data-resources-part-1[Part | ||
1 of the Guidelines] covers the basics of metadata and provides an | ||
introduction to the other two parts. It includes a glossary of terms and | ||
set of references. Part 3 | ||
[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[3]] | ||
set of references. https://www.agi.org.uk/wp-content/uploads/2020/12/METADATAGUIDELINESPART32015-04.pdf[Part 3] | ||
deals with metadata quality and covers quality evaluation and quality | ||
management of metadata including guidance on establishing acceptable | ||
quality levels. This Part of the Guidelines provides a set of detailed | ||
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@@ -72,9 +39,9 @@ correspond to version 2.3 of UK GEMINI. | |
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Any comments on these guidelines or on the UK GEMINI2 metadata standard | ||
should be sent | ||
to{nbsp}[email protected]. | ||
to mailto:[email protected][[email protected]]. | ||
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=== [#intro]##{nbsp}1. Introduction | ||
== Introduction | ||
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UK GEMINI2 defines a core set of metadata elements for discovery of data | ||
resources and other essential purposes. It provides details of what | ||
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area. The data resources may be graphical or textual (tabular or free | ||
text), hardcopy or digital. | ||
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This part of the{nbsp}_Metadata Guidelines for Geospatial Data | ||
Resources_{nbsp}provides detailed guidance for the application of UK GEMINI2. | ||
This part of the _Metadata Guidelines for Geospatial Data Resources_ provides detailed guidance for the application of UK GEMINI2. | ||
It is aimed at those creating metadata conforming to UK GEMINI2. This | ||
expands on existing guidance given in the UK GEMINI2 | ||
specification[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[4]]. | ||
specification. | ||
It also describes possible errors that might occur in such metadata and | ||
suggests actions to guard against them. It explains how to expand the | ||
metadata elements in addition to those in UK GEMINI2 if required, and | ||
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@@ -99,40 +65,35 @@ how to extend code lists of allowable values. | |
This Part should be read in conjunction with the other parts of these | ||
guidelines. | ||
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=== [#gemini]##{nbsp}2. GEMINI2 | ||
== GEMINI2 | ||
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==== *_[#2.1]####2.1 Metadata elements_* | ||
=== Metadata elements | ||
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UK GEMINI2 specifies a set of metadata elements for describing | ||
geospatial data resources. These resources may be a dataset, data set | ||
series (collection of datasets with a common specification) or data | ||
service. The type of resource is identified in the element Resource Type | ||
(39). The metadata elements are summarised | ||
in{nbsp}https://www.agi.org.uk/gemini/40-gemini/1250-element-summary[element | ||
summary]. | ||
(39). The metadata elements are summarised in link:1250-element-summary[element summary]. | ||
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Detailed guidance on how to create each of these elements can be found | ||
here: | ||
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https://www.agi.org.uk/gemini/40-gemini/1027-citizens-as-sensors-a-solution-to-pollution[GEMINI | ||
- Datasets and data series] | ||
link:datasets.html[GEMINI - Datasets and data series] | ||
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GEMINI - Services | ||
link:services.html[GEMINI - Services] | ||
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==== *_[#2.2]####2.2 Additional metadata elements_* | ||
=== Additional metadata elements | ||
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In many organisations, there is a need to record additional items of | ||
metadata to meet specific local requirements. This may be to incorporate | ||
particular characteristics of the data resources, or for particular | ||
applications. Additional metadata elements may be included in a metadata | ||
implementation. These elements should be taken from ISO | ||
19115{nbsp}_Geographic information - | ||
Metadata{nbsp}_[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[18]], | ||
implementation. These elements should be taken from ISO 19115:2003 _Geographic information - Metadata_, | ||
which includes a comprehensive collection of metadata elements for | ||
geographic information. An example would be Dataset character set and | ||
Metadata character set where non-standard characters are used. | ||
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==== *_[#2.3]####2.3 Extension of code lists_* | ||
=== Extension of code lists | ||
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Several of the metadata elements specified in UK GEMINI2 use enumerated | ||
code lists. These are pre-defined sets of values identified by codes. | ||
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Such code extensions may be either specific to a metadata implementation | ||
in an organisation or sector, or for general usage. In the latter case, | ||
proposed new codes should be submitted | ||
(to{nbsp}mailto:[email protected][[email protected]) | ||
(to mailto:[email protected][[email protected]]) | ||
for inclusion in the next version of UK GEMINI2. It is expected that | ||
future editions of UK GEMINI will incorporate such modified code lists. | ||
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*Note that any new code values cannot be used in a national metadata | ||
service until incorporated in the Standard, neither will they be valid | ||
for the purposes of INSPIRE.* | ||
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=== [#errors]##{nbsp}3. Possible metadata errors | ||
== Possible metadata errors | ||
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==== *_[#3.1]####3.1 Impact of metadata errors_* | ||
=== Impact of metadata errors | ||
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Errors having the greatest impact are likely to be those that affect | ||
searches based on: | ||
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categorisation of data subject or topic, will further erode the quality | ||
of the discovery service. | ||
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==== *_[#3.2]####3.2 Effect on searches_* | ||
=== Effect on searches | ||
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Having discovered a number of candidate data resources, the discovery | ||
service user then assesses the likelihood that any of these meet their | ||
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uncommon for this to be out-of-date or have incorrect URLs or contact | ||
details. | ||
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==== *_[#3.3]####3.3 Prevention and correction of errors_* | ||
=== Prevention and correction of errors | ||
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Prevention and correction of these errors is usually a combination of: | ||
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* Overall quality assurance process which reviews procedures in the | ||
light of experience and aims to improve overall metadata quality. | ||
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Further guidance on how to prevent and correct errors is given in Part 3 | ||
[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[3]]{nbsp}of | ||
these Guidelines. | ||
Further guidance on how to prevent and correct errors is given in https://www.agi.org.uk/wp-content/uploads/2020/12/METADATAGUIDELINESPART32015-04.pdf[Part 3] of these Guidelines. | ||
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==== *_[#3.4]####3.4 Common errors_* | ||
=== Common errors | ||
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Some common errors that lead to inconsistent results when searching | ||
across metadatasets are: | ||
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a| | ||
Have clear guidance on the “chunking” of data resources for individual | ||
documentation[See{nbsp}https://www.agi.org.uk/gemini/40-gemini/1052-metadata-guidelines-for-geospatial-data-resources-part-1[Part | ||
1 of these Guidelines]] based on: | ||
documentation (See link:1052-metadata-guidelines-for-geospatial-data-resources-part-1[Part | ||
1 of these Guidelines]) based on: | ||
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. how the data is used (stand-alone or as part of wider set); | ||
. continuity and extent of coverage; | ||
. date of capture or maintenance; | ||
. topics or subjects covered, and | ||
. uniformity of specification within data resource. | ||
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++++ | ||
<br/> | ||
++++ | ||
Introduce checks to ensure consistency of approach across all metadata. | ||
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|Extent over-generalised |This particularly applies when extent is | ||
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be used. Where named extents form part of a nesting hierarchy (e.g. | ||
administrative areas) then any guidance should cover the possible need | ||
for inclusion of levels in the hierarchy. | ||
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++++ | ||
<br/> | ||
++++ | ||
Introduce checks to ensure consistency of approach across all metadata. | ||
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|Subjects and topic categories under-reported |This particularly applies | ||
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topics. a| | ||
Use guidance on the recording of topics or themes to promote | ||
consistency. | ||
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++++ | ||
<br/> | ||
++++ | ||
Use closed lists wherever possible and discourage the use of free text. | ||
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++++ | ||
<br/> | ||
++++ | ||
Introduce checks to ensure consistency of approach across all metadata. | ||
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|Incorrect or inconsistent date entries a| | ||
There is often confusion between the date that the data was current, the | ||
date when the data was captured or last updated and the date when the | ||
data resource was released, published or made available. | ||
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++++ | ||
<br/> | ||
++++ | ||
There can be further inconsistencies between the frequency of update and | ||
the recorded currency of the data resource. This can lead to {nbsp} false | ||
returns for searches based on dates. | ||
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a| | ||
Use guidance on the recording of different dates to promote consistency. | ||
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++++ | ||
<br/> | ||
++++ | ||
Introduce checks, preferably by software, to ensure that the ordering of | ||
dates is consistent. | ||
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misinterpretation of results. |National Grid, British National Grid, | ||
National Grid of Great Britain. a| | ||
Include frequently used standard names in any internal guidance. | ||
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++++ | ||
<br/> | ||
++++ | ||
Introduce checks to ensure consistency of approach across all metadata. | ||
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|Missing values |Omission of values relating to extent, date or topic | ||
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a| | ||
Use guidance on the definition and use of the metadata elements | ||
especially those most commonly confused (see examples). | ||
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++++ | ||
<br/> | ||
++++ | ||
Introduce training and checks to ensure correct use of elements. | ||
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|Values incorrect, incomplete or inaccurate |This can apply to both | ||
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|Use guidance and checklists for compiling entries e.g. abstracts. | ||
|=== | ||
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=== [#guidance]####4. Guidance for individual metadata elements | ||
== Guidance for individual metadata elements | ||
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Detailed guidance on how to create each of these elements can be found | ||
here: | ||
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https://www.agi.org.uk/gemini/40-gemini/1062-gemini-datasets-and-data-series/[GEMINI | ||
- Datasets and data series] | ||
link:datasets.html[GEMINI - Datasets and data series] | ||
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https://www.agi.org.uk/gemini/40-gemini/1063-gemini-services/[GEMINI - | ||
Services] | ||
link:services.html[GEMINI - Services] | ||
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Each metadata element is listed{nbsp}separately, as described | ||
in{nbsp}https://www.agi.org.uk/gemini/40-gemini/1244-uk-gemini-introduction#4.3[UK | ||
GEMINI Introduction]. | ||
Each metadata element is listed separately, as described | ||
in link:1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources.html#4.3[UK GEMINI Introduction]. | ||
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_Last updated: May 2018_ | ||
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http://creativecommons.org/licenses/by/4.0/[image:https://i.creativecommons.org/l/by/4.0/88x31.png[Creative | ||
Commons Licence]] + | ||
This work is licensed under | ||
a{nbsp}http://creativecommons.org/licenses/by/4.0/[Creative Commons | ||
Attribution 4.0 International License] | ||
http://creativecommons.org/licenses/by/4.0/[image:https://i.creativecommons.org/l/by/4.0/88x31.png[Creative Commons Licence]] + | ||
This work is licensed under a http://creativecommons.org/licenses/by/4.0/[Creative Commons Attribution 4.0 International License] |