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      <titlStmt>
        <titl xml:lang="sv">En 50 m spatial representation av täckdikade jordbruksarealer i centrala och södra Sverige</titl>
        <parTitl xml:lang="en">A 50 m spatial representation of probable subsurface drained arable land in central and southern Sweden</parTitl>
        <IDNo agency="SND">2025-187-1</IDNo>
        <IDNo agency="slu.se">SLU.mark.2025.4.2.IÄ-13</IDNo>
        <IDNo agency="DOI">https://doi.org/10.5878/veb2-nh54</IDNo>
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        <producer xml:lang="sv" abbr="SND">Svensk nationell datatjänst</producer>
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    <citation>
      <titlStmt>
        <titl xml:lang="sv">En 50 m spatial representation av täckdikade jordbruksarealer i centrala och södra Sverige</titl>
        <parTitl xml:lang="en">A 50 m spatial representation of probable subsurface drained arable land in central and southern Sweden</parTitl>
        <IDNo agency="SND">2025-187-1</IDNo>
        <IDNo agency="slu.se">SLU.mark.2025.4.2.IÄ-13</IDNo>
        <IDNo agency="DOI">https://doi.org/10.5878/veb2-nh54</IDNo>
        <IDNo agency="DOI">10.1038/s41597-020-00596-x</IDNo>
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        <IDNo agency="DOI">10.1016/j.agwat.2023.108304</IDNo>
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        <IDNo agency="DOI">10.54612/a.4u0lm02926</IDNo>
      </titlStmt>
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        <AuthEnty xml:lang="en" affiliation="Department of Soil and Environment, Swedish University of Agricultural Sciences">Malmquist, Louise</AuthEnty>
        <AuthEnty xml:lang="sv" affiliation="Institutionen för mark och miljö, Sveriges lantbruksuniversitet">Malmquist, Louise</AuthEnty>
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      <distStmt>
        <distrbtr xml:lang="en" abbr="SND" URI="https://snd.se">Swedish National Data Service</distrbtr>
        <distrbtr xml:lang="sv" abbr="SND" URI="https://snd.se">Svensk nationell datatjänst</distrbtr>
        <distDate xml:lang="en" date="2025-09-08" />
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    <stdyInfo>
      <subject>
        <keyword xml:lang="en" vocab="GEMET" vocabURI="http://www.eionet.europa.eu/gemet/concept/8168">subsoil drainage</keyword>
        <keyword xml:lang="sv" vocab="GEMET" vocabURI="http://www.eionet.europa.eu/gemet/concept/8168">täckdikning</keyword>
        <keyword xml:lang="en" vocab="INSPIRE Spatial Data Themes" vocabURI="http://inspire.ec.europa.eu/theme/af">Agricultural and aquaculture facilities</keyword>
        <keyword xml:lang="sv" vocab="INSPIRE Spatial Data Themes" vocabURI="http://inspire.ec.europa.eu/theme/af">Jordbruks- och vattenbruksanläggningar</keyword>
        <keyword xml:lang="en" vocab="AGROVOC" vocabURI="http://aims.fao.org/aos/agrovoc/c_25598">tile drainage</keyword>
        <keyword xml:lang="en" vocab="AGROVOC" vocabURI="http://aims.fao.org/aos/agrovoc/c_7549">sweden</keyword>
        <topcClas xml:lang="en" vocab="INSPIRE topic categories" vocabURI="http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/farming">Farming</topcClas>
        <topcClas xml:lang="sv" vocab="INSPIRE topic categories" vocabURI="http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/farming">Areella näringar</topcClas>
      </subject>
      <abstract xml:lang="en" contentType="abstract">Throughout increased expansion of farmland in Sweden, drainage have been an important part for land acquisition to keep soil moisture levels sufficient for land accessibility and crop production. Increased magnitude and frequency of extreme weather events such as high precipitation events and hydrological floods have already been seen affecting crop production in recent years. Hence putting pressure on increasing demand for thorough drainage systems.

While data on open ditch- and regional drainage systems is readily available, data on subsurface drainage is scarce. Hence, this dataset presents the first spatial location of estimated tile-drained fields in Southern-central Sweden, based on county-wise statistics at 50*50 m resolution.

This dataset show spatial coverage of probable subsurface drained agricultural area in central to southern Sweden. The dataset is created by combining slope and soil drainage class based on clay content, and the area limited by statistics from 2016 over county wise determined area of subsurface drainage.

The documentation contains:
README: Description of maps and references on which the dataset is based; which files are included and their contents; references to method description and compiled results from the dataset.

SubsurfaceDrainage_Dataset-description_2025-06-23: Describes the purpose of the dataset's origin, method and validation of results.

CountywiseTileDrainArea_Code: R-code used for the creation of the tile drainage maps per county included in this dataset.</abstract>
      <abstract xml:lang="sv" contentType="abstract">Genom den ökade expansionen av jordbruksmark i Sverige har dränering varit en viktig del av markförvärv för att hålla markfuktigheten tillräcklig för marktillgänglighet och grödoproduktion. Ökad omfattning och frekvens av extrema väderhändelser, såsom hög nederbörd och hydrologiska översvämningar, har redan setts påverka grödoproduktionen under senare år. Detta har satt press på den ökande efterfrågan på grundliga dräneringssystem.

Medan data om öppna diken och regionala dräneringssystem är lättillgängliga, är data om markdränering knapphändiga. Därför presenterar denna datauppsättning den första geografiska platsen för uppskattade tegeldränerade fält i södra och centrala Sverige, baserat på länsvis statistik med 50*50 m upplösning.

Detta dataset beskriver en spatial förmodad utbredning av täckdikad jordbruksareal i centrala till södra Sverige framtaget genom kombination av  lutning och dräneringsklass baserad på lerhalt och avgränsad av statistik över täckdikad areal från 2016.  


Dokumentationen innehåller:
README: Beskrivning av kartor och referenser som datasetet baserats på; vilka filer som ingår och deras innehåll; referenser till metodbeskrivning och sammanställda resultat från datasetet.

SubsurfaceDrainage_Dataset-description_2025-06-23: Beskriver syftet med datasetets ursprung, metod samt valideringsresultat.

CountywiseTileDrainArea_Code: R-kod för framtagandet av de länsvisa dräneringskartor som utgör det publicerade datasetet.</abstract>
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        <collDate xml:lang="en" date="2024" event="end">2024</collDate>
        <nation xml:lang="en" abbr="SE">Sweden</nation>
        <nation xml:lang="sv" abbr="SE">Sverige</nation>
        <anlyUnit xml:lang="en" unit="Geographic unit">Geographic unit<concept vocab="DDI Analysis Unit" vocabURI="https://vocabularies.cessda.eu/v2/vocabularies/AnalysisUnit/2.1.3?languageVersion=en-2.1.3">Geographic unit</concept></anlyUnit>
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        <sampProc xml:lang="en">Other<concept vocab="DDI Sampling Procedure" vocabURI="https://vocabularies.cessda.eu/v2/vocabularies/SamplingProcedure/2.0.1?languageVersion=en-2.0.1">Other</concept></sampProc>
        <sampProc xml:lang="sv">Övrigt<concept vocab="DDI Sampling Procedure" vocabURI="https://vocabularies.cessda.eu/v2/vocabularies/SamplingProcedure/2.0.1?languageVersion=sv-2.0.1">Övrigt</concept></sampProc>
        <collMode xml:lang="en">Data collection has been done from spatial maps of county boundaries (Lantmäteriet, Swedish mapping, cadastral and land registration authority), agricultural blocks (Swedish Board of Agriculture), clay content (Piikki &amp; Söderström, 2019) and elevation data (Swedish mapping, cadastral and land registration authority), as well as quantitative statistics on cover ditching per county (Swedish Board of Agriculture). For complete references, please refer to the documentation SubsurfaceDrainage_Dataset-description_2025-06-23.docx.<concept vocab="DDI Mode of Collection" vocabURI="https://vocabularies.cessda.eu/v2/vocabularies/ModeOfCollection/5.0.0?languageVersion=en-5.0.0">Data collection has been done from spatial maps of county boundaries (Lantmäteriet, Swedish mapping, cadastral and land registration authority), agricultural blocks (Swedish Board of Agriculture), clay content (Piikki &amp; Söderström, 2019) and elevation data (Swedish mapping, cadastral and land registration authority), as well as quantitative statistics on cover ditching per county (Swedish Board of Agriculture). For complete references, please refer to the documentation SubsurfaceDrainage_Dataset-description_2025-06-23.docx.</concept></collMode>
        <collMode xml:lang="sv">Datainsamling har skett av spatiala kartor över länsgränser (Lantmäteriet), jordbruksblock (Jordbruksverket), lerinnehåll (Piikki &amp; Söderström, 2019) och höjddata (Lantmäteriet), samt kvantiativ statistik över täckdikning per län (Jordbruksverket). För fullständiga referenser hänvisas till dokumentationen SubsurfaceDrainage_Dataset-description_2025-06-23.docx.<concept vocab="DDI Mode of Collection" vocabURI="https://vocabularies.cessda.eu/v2/vocabularies/ModeOfCollection/5.0.0?languageVersion=sv-5.0.0">Datainsamling har skett av spatiala kartor över länsgränser (Lantmäteriet), jordbruksblock (Jordbruksverket), lerinnehåll (Piikki &amp; Söderström, 2019) och höjddata (Lantmäteriet), samt kvantiativ statistik över täckdikning per län (Jordbruksverket). För fullständiga referenser hänvisas till dokumentationen SubsurfaceDrainage_Dataset-description_2025-06-23.docx.</concept></collMode>
        <collMode xml:lang="en">Other<concept vocab="DDI Mode of Collection" vocabURI="https://vocabularies.cessda.eu/v2/vocabularies/ModeOfCollection/5.0.0?languageVersion=en-5.0.0">Other</concept></collMode>
        <collMode xml:lang="sv">Övrigt<concept vocab="DDI Mode of Collection" vocabURI="https://vocabularies.cessda.eu/v2/vocabularies/ModeOfCollection/5.0.0?languageVersion=sv-5.0.0">Övrigt</concept></collMode>
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    </method>
    <dataAccs>
      <useStmt>
        <restrctn xml:lang="en">Access to data through SND. Data are freely accessible.</restrctn>
        <restrctn xml:lang="sv">Åtkomst till data via SND. Data är fritt tillgängliga.</restrctn>
        <conditions elementVersion="info:eu-repo-Access-Terms vocabulary">openAccess</conditions>
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          <titlStmt>
            <titl xml:lang="sv">Valayamkunnath, P., Barlage, M., Chen, F. et al. (2020) Mapping of 30-meter resolution tile-drained croplands using a geospatial modeling approach. Sci Data 7, 257. https://doi.org/10.1038/s41597-020-00596-x</titl>
            <parTitl xml:lang="en">Valayamkunnath, P., Barlage, M., Chen, F. et al. (2020) Mapping of 30-meter resolution tile-drained croplands using a geospatial modeling approach. Sci Data 7, 257. https://doi.org/10.1038/s41597-020-00596-x</parTitl>
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            <distDate date="2020">2020</distDate>
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        </citation>
      </relPubl>
      <relPubl>
        <citation>
          <titlStmt>
            <titl xml:lang="sv">Malmquist, L., &amp; Barron, J. (2023). Improving spatial resolution in soil and drainage data to combine natural and anthropogenic water functions at catchment scale in agricultural landscapes. Agricultural Water Management, 283, 108304. https://doi.org/10.1016/j.agwat.2023.108304</titl>
            <parTitl xml:lang="en">Malmquist, L., &amp; Barron, J. (2023). Improving spatial resolution in soil and drainage data to combine natural and anthropogenic water functions at catchment scale in agricultural landscapes. Agricultural Water Management, 283, 108304. https://doi.org/10.1016/j.agwat.2023.108304</parTitl>
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        <citation>
          <titlStmt>
            <titl xml:lang="sv">Malmquist, L. (2025). Water balance in agricultural catchments amidst climate and land use changes in Sweden. Diss. Swedish University of Agricultural Sciences. https://doi.org/10.54612/a.4u0lm02926</titl>
            <parTitl xml:lang="en">Malmquist, L. (2025). Water balance in agricultural catchments amidst climate and land use changes in Sweden. Diss. Swedish University of Agricultural Sciences. https://doi.org/10.54612/a.4u0lm02926</parTitl>
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