Digital Commonwealth

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  <mods:titleInfo displayLabel='primary_display' usage='primary'>
    <mods:title>National Historical Geographic Information System</mods:title>
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  <mods:name type='corporate'>
    <mods:namePart>NHGIS</mods:namePart>
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  <mods:typeOfResource>Dataset</mods:typeOfResource>
  <mods:genre authority='ogm' authorityURI='https://opengeometadata.org/ogm-aardvark/#' displayLabel='specific'>Polygon data</mods:genre>
  <mods:genre authority='lcgft' authorityURI='http://id.loc.gov/authorities/genreForms' displayLabel='specific' valueURI='http://id.loc.gov/authorities/genreForms/gf2011026297'>Geospatial data</mods:genre>
  <mods:genre authority='lcgft' authorityURI='http://id.loc.gov/authorities/genreForms' displayLabel='general' valueURI='http://id.loc.gov/authorities/genreForms/gf2018026119'>Data sets</mods:genre>
  <mods:originInfo>
    <mods:dateIssued encoding='w3cdtf' keyDate='yes'>2022-10-18</mods:dateIssued>
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  <mods:physicalDescription>
    <mods:digitalOrigin>born digital</mods:digitalOrigin>
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  <mods:abstract>The NHGIS provides a user-friendly interface for exploring and downloading Census GIS files and tabular datasets. NHGIS is a project of Integrated Public Use Microdata Series (IPUMS), a demographic and population data aggregator housed at the University of Minnesota. For more information NHGIS and IPUMS and to download Census data, visit their website at [https://nhgis.org](https://nhgis.org)</mods:abstract>
  <mods:note>NHGIS data covers 1790-present day in increments of 10-year, 5-year, 3-year, and 1-year estimates.</mods:note>
  <mods:subject authority='lcsh' authorityURI='http://id.loc.gov/authorities/subjects'>
    <mods:topic>Demographic surveys--United States</mods:topic>
  </mods:subject>
  <mods:subject authority='lcsh' authorityURI='http://id.loc.gov/authorities/subjects'>
    <mods:topic>Demographic surveys</mods:topic>
  </mods:subject>
  <mods:subject authority='lcsh' authorityURI='http://id.loc.gov/authorities/subjects'>
    <mods:topic>Population statistics</mods:topic>
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  <mods:subject authority='lcsh' authorityURI='http://id.loc.gov/authorities/subjects'>
    <mods:topic>Census</mods:topic>
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  <mods:subject authority='lcsh' authorityURI='http://id.loc.gov/authorities/subjects'>
    <mods:topic>https://id.loc.gov/authorities/subjects/sh00006969.html</mods:topic>
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  <mods:subject authority='geonames' authorityURI='http://sws.geonames.org' valueURI='http://sws.geonames.org/6252001'>
    <mods:geographic>United States</mods:geographic>
    <mods:cartographics>
      <mods:coordinates>39.76,-98.5</mods:coordinates>
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  </mods:subject>
  <mods:subject>
    <mods:temporal encoding='w3cdtf' point='start'>1790</mods:temporal>
    <mods:temporal encoding='w3cdtf' point='end'>Present day</mods:temporal>
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    <mods:titleInfo>
      <mods:title>GIS Data Sets</mods:title>
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  <mods:relatedItem displayLabel='American Community Survey (ACS) Design and Methodology (documentation)' xlink:href='https://www2.census.gov/programs-surveys/acs/methodology/design_and_methodology/' type='isReferencedBy'/>
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  <mods:relatedItem displayLabel='Working with NHGIS and Joins (tutorial)' xlink:href='http://steppingintothemap.com/mappinghistory/wp-content/uploads/2018/03/Working-with-NHGIS-and-Joins.pdf' type='isReferencedBy'/>
  <mods:identifier type='uri'>https://ark-dc3dev.bpl.org/ark:/50959/sx61f792t</mods:identifier>
  <mods:identifier type='local-other'>ark:/76611/dl9ehcpwy</mods:identifier>
  <mods:location>
    <mods:physicalLocation>Boston Public Library</mods:physicalLocation>
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  <mods:accessCondition displayLabel='license' type='use and reproduction'>This work is in the public domain under a Creative Commons No Rights Reserved License (CC0).</mods:accessCondition>
  <mods:accessCondition displayLabel='rights' type='use and reproduction'>No known copyright restrictions.</mods:accessCondition>
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    <mods:recordContentSource>Boston Public Library</mods:recordContentSource>
    <mods:recordCreationDate encoding='w3cdtf'>2025-02-11T17:31:38Z</mods:recordCreationDate>
    <mods:recordChangeDate encoding='w3cdtf'>2025-02-11T17:31:38Z</mods:recordChangeDate>
    <mods:recordOrigin>human prepared</mods:recordOrigin>
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