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class=docItemContainer_Djhp><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label=Breadcrumbs><ul class=breadcrumbs><li class=breadcrumbs__item><a aria-label="Home page" class=breadcrumbs__link href=/><svg viewBox="0 0 24 24" class=breadcrumbHomeIcon_YNFT><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill=currentColor /></svg></a><li class=breadcrumbs__item><span class=breadcrumbs__link>Policy Makers & Advocates</span><li class=breadcrumbs__item><span class=breadcrumbs__link>Understanding the Data</span><li class="breadcrumbs__item breadcrumbs__item--active"><span class=breadcrumbs__link>Data Sources Overview</span></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type=button class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Data Sources Overview</h1></header>
<p>This document covers the <strong>official, free, public datasets</strong> used by Open Navigator.</p>
<div class="theme-admonition theme-admonition-tip admonition_xJq3 alert alert--success"><div class=admonitionHeading_Gvgb><span class=admonitionIcon_Rf37><svg viewBox="0 0 12 16"><path fill-rule=evenodd d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z"/></svg></span>📚 Full Citations & Academic References</div><div class=admonitionContent_BuS1><p>For complete citations, licenses, and attribution for all data sources, see:<p>👉 <strong><a class="" href=/docs/data-sources/citations>Citations & Data Sources</a></strong> — Includes BibTeX citations, license information, coverage details, and links to original sources.</div></div>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=-data-scale--coverage>📊 Data Scale & Coverage<a href=#-data-scale--coverage class=hash-link aria-label="Direct link to 📊 Data Scale & Coverage" title="Direct link to 📊 Data Scale & Coverage" translate=no></a></h2>
<p>Open Navigator provides comprehensive coverage across the United States:</p>
<table><thead><tr><th>Data Type<th>Count<th>Coverage<tbody><tr><td><strong>Government Jurisdictions</strong><td>90,000+<td>All U.S. local governments<tr><td><strong>Counties</strong><td>3,144<td>100% of U.S. counties<tr><td><strong>Municipalities</strong><td>19,500+<td>Cities, towns, villages<tr><td><strong>Townships</strong><td>36,000+<td>County subdivisions<tr><td><strong>School Districts</strong><td>13,000+<td>Complete NCES coverage<tr><td><strong>Nonprofit Organizations</strong><td>3,000,000+<td>All IRS-registered 501(c) orgs<tr><td><strong>Official .gov Domains</strong><td>15,000+<td>CISA validated domains<tr><td><strong>States</strong><td>50<td>All U.S. states + DC<tr><td><strong>Meeting Video Sources</strong><td>1,000+<td>Cities with full transcripts</table>
<p><strong>Key Insight:</strong> All data sources are <strong>100% free and public</strong> - no subscriptions, no API fees, no paywalls.</p>
<hr/>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=-data-source-categories>📂 Data Source Categories<a href=#-data-source-categories class=hash-link aria-label="Direct link to 📂 Data Source Categories" title="Direct link to 📂 Data Source Categories" translate=no></a></h2>
<p>Open Navigator integrates data from six main categories:</p>
<ol>
<li class=""><strong><a href=#government-jurisdiction-data class="">Government Jurisdictions</a></strong> - Cities, counties, school districts (this page)</li>
<li class=""><strong><a class="" href=/docs/data-sources/nonprofit-sources>Nonprofit Organizations</a></strong> - IRS Form 990s, charity ratings, transparency data</li>
<li class=""><strong><a class="" href=/docs/data-sources/ballot-election-sources>Ballot Measures & Elections</a></strong> - Propositions, referendums, election results</li>
<li class=""><strong><a class="" href=/docs/data-sources/polling-survey-sources>Public Opinion & Surveys</a></strong> - Scientifically validated survey questions, polling data</li>
<li class=""><strong><a class="" href=/docs/data-sources/factcheck-sources>Fact-Checking & Verification</a></strong> - Google Fact Check API, FactCheck.org, PolitiFact claim verification</li>
<li class=""><strong><a class="" href=/docs/data-sources/open-source-repositories>Open Source Projects</a></strong> - Civic tech repositories, community tools, digital public goods</li>
</ol>
<hr/>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=️-government-jurisdiction-data>🏛️ Government Jurisdiction Data<a href=#️-government-jurisdiction-data class=hash-link aria-label="Direct link to 🏛️ Government Jurisdiction Data" title="Direct link to 🏛️ Government Jurisdiction Data" translate=no></a></h2>
<h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=1-cisa-gov-domain-master-list--most-authoritative>1. CISA .gov Domain Master List ⭐ <strong>Most Authoritative</strong><a href=#1-cisa-gov-domain-master-list--most-authoritative class=hash-link aria-label="Direct link to 1-cisa-gov-domain-master-list--most-authoritative" title="Direct link to 1-cisa-gov-domain-master-list--most-authoritative" translate=no></a></h3>
<p><strong>Source:</strong> Cybersecurity and Infrastructure Security Agency (CISA)<br/>
<strong>URL:</strong> <a href=https://github.com/cisagov/dotgov-data target=_blank rel="noopener noreferrer" class="">https://github.com/cisagov/dotgov-data</a><br/>
<strong>File:</strong> <code>current-full.csv</code> (updated daily!)</p>
<p><strong>What It Contains:</strong></p>
<ul>
<li class=""><strong>15,000+ registered .gov domains</strong></li>
<li class="">Domain Type: City, County, State, Tribal, School District</li>
<li class="">Organization names and locations</li>
<li class="">Security contacts and registration dates</li>
</ul>
<p><strong>Why We Use It:</strong></p>
<blockquote>
<p>"The most authoritative source for government URLs is CISA. They maintain a daily-updated repository of every registered .gov domain."</p>
</blockquote>
<p><strong>How We Use It:</strong></p>
<div class="language-python codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-python codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic># Direct download from GitHub</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>from</span><span class="token plain"> discovery</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">gsa_domains </span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> GSADomainList</span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">gsa </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> GSADomainList</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">domains_df </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>await</span><span class="token plain"> gsa</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">download_domain_list</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><br/></div></code></pre></div></div>
<p><strong>Lakehouse Strategy:</strong></p>
<ol>
<li class="">Ingest to <strong>Bronze Layer</strong> (<code>bronze/gov_domains</code>)</li>
<li class="">Filter by <code>Domain Type</code> for targeted scraping (City, County)</li>
<li class="">Use for <strong>exact matching</strong> (confidence: 0.95-1.0)</li>
<li class="">Use for <strong>fuzzy matching</strong> with 75%+ similarity</li>
</ol>
<hr/>
<h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=2-us-census-bureau---government-integrated-directory-gid>2. U.S. Census Bureau - Government Integrated Directory (GID)<a href=#2-us-census-bureau---government-integrated-directory-gid class=hash-link aria-label="Direct link to 2. U.S. Census Bureau - Government Integrated Directory (GID)" title="Direct link to 2. U.S. Census Bureau - Government Integrated Directory (GID)" translate=no></a></h3>
<p><strong>Source:</strong> U.S. Census Bureau, Government Statistics<br/>
<strong>URL:</strong> <a href=https://www.census.gov/programs-surveys/gus.html target=_blank rel="noopener noreferrer" class="">https://www.census.gov/programs-surveys/gus.html</a><br/>
<strong>Dataset:</strong> 2022 Census of Governments</p>
<p><strong>What It Contains:</strong></p>
<ul>
<li class=""><strong>90,735 total government units</strong>
<ul>
<li class="">3,143 counties</li>
<li class="">19,495 municipalities (cities/towns)</li>
<li class="">16,504 townships</li>
<li class="">13,051 school districts</li>
<li class="">38,542 special districts</li>
</ul>
</li>
<li class="">FIPS codes (standardized IDs)</li>
<li class="">Population data</li>
<li class="">Geographic hierarchy (state, county, place)</li>
</ul>
<p><strong>Why We Use It:</strong></p>
<blockquote>
<p>"The Census Bureau GID provides a list of all 90,000+ legal government units. You can join this against the CISA list to find 'missing' URLs that your agent needs to hunt for."</p>
</blockquote>
<p><strong>How We Use It:</strong></p>
<div class="language-python codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-python codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>from</span><span class="token plain"> discovery</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">census_ingestion </span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> CensusGovernmentIngestion</span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">census </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> CensusGovernmentIngestion</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">dfs </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>await</span><span class="token plain"> census</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">ingest_all_jurisdictions</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><br/></div></code></pre></div></div>
<p><strong>Lakehouse Strategy:</strong></p>
<ol>
<li class="">Ingest to <strong>Bronze Layer</strong> (<code>bronze/jurisdictions/{{type}}</code>)</li>
<li class="">Create <strong>unified view</strong> with all jurisdiction types</li>
<li class=""><strong>Join with CISA</strong> to identify missing URLs</li>
<li class="">Prioritize by population for scraping</li>
</ol>
<hr/>
<h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=3-nces-common-core-of-data-ccd>3. NCES Common Core of Data (CCD)<a href=#3-nces-common-core-of-data-ccd class=hash-link aria-label="Direct link to 3. NCES Common Core of Data (CCD)" title="Direct link to 3. NCES Common Core of Data (CCD)" translate=no></a></h3>
<p><strong>Source:</strong> National Center for Education Statistics (NCES)<br/>
<strong>URL:</strong> <a href=https://nces.ed.gov/ccd/ target=_blank rel="noopener noreferrer" class="">https://nces.ed.gov/ccd/</a><br/>
<strong>Dataset:</strong> Local Education Agency (LEA) Universe Survey</p>
<p><strong>What It Contains:</strong></p>
<ul>
<li class=""><strong>13,000+ school districts</strong></li>
<li class="">Official district names and NCES IDs</li>
<li class="">Physical addresses and phone numbers</li>
<li class=""><strong>Website URLs</strong> (when available)</li>
<li class="">Enrollment and demographic data</li>
<li class="">District type (Regular, Charter, etc.)</li>
</ul>
<p><strong>Why We Use It:</strong></p>
<blockquote>
<p>"Since one of your goals is tracking school dental screenings, you need a dedicated list of school board domains, as these are often separate from city governments."</p>
</blockquote>
<p><strong>How We Use It:</strong></p>
<div class="language-python codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-python codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>from</span><span class="token plain"> discovery</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">nces_ingestion </span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> NCESSchoolDistrictIngestion</span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">nces </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> NCESSchoolDistrictIngestion</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">districts_df </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>await</span><span class="token plain"> nces</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">ingest_school_districts</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><br/></div></code></pre></div></div>
<p><strong>Lakehouse Strategy:</strong></p>
<ol>
<li class="">Ingest to <strong>Bronze Layer</strong> (<code>bronze/nces_school_districts</code>)</li>
<li class="">Extract <strong>provided URLs</strong> (many NCES records include website field!)</li>
<li class="">Use district names to <strong>generate URL patterns</strong> for missing sites</li>
<li class="">Common pattern: <code>{{district}}.k12.{{state}}.us</code></li>
</ol>
<hr/>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=-summary-table-where-to-pull-the-lists>📋 Summary Table: Where to Pull the Lists<a href=#-summary-table-where-to-pull-the-lists class=hash-link aria-label="Direct link to 📋 Summary Table: Where to Pull the Lists" title="Direct link to 📋 Summary Table: Where to Pull the Lists" translate=no></a></h2>
<table><thead><tr><th>Jurisdiction Type<th>Primary Free Source<th>Format<th>Coverage<tbody><tr><td><strong>All Official .gov</strong><td>CISA dotgov-data<td>CSV / GitHub<td>15,000+ domains<tr><td><strong>School Districts</strong><td>NCES CCD Data<td>CSV<td>13,000+ districts<tr><td><strong>Counties/Cities</strong><td>Census Bureau GID<td>CSV<td>22,638 jurisdictions<tr><td><strong>Townships</strong><td>Census Bureau GID<td>CSV<td>16,504 townships<tr><td><strong>Special Districts</strong><td>Census Bureau GID<td>CSV<td>38,542 districts<tr><td><strong>State Legislatures</strong><td>LegiScan API<td>JSON / API<td>50 states</table>
<hr/>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=-scraping-strategy-based-on-your-guidance>🔍 Scraping Strategy (Based on Your Guidance)<a href=#-scraping-strategy-based-on-your-guidance class=hash-link aria-label="Direct link to 🔍 Scraping Strategy (Based on Your Guidance)" title="Direct link to 🔍 Scraping Strategy (Based on Your Guidance)" translate=no></a></h2>
<h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=step-1-ingest>Step 1: Ingest<a href=#step-1-ingest class=hash-link aria-label="Direct link to Step 1: Ingest" title="Direct link to Step 1: Ingest" translate=no></a></h3>
<div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">python main.py init  # Initialize Delta Lake</span><br/></div><div class=token-line style=color:#393A34><span class="token plain">python main.py discover-jurisdictions --limit 100  # Test run</span><br/></div></code></pre></div></div>
<p><strong>Pulls:</strong></p>
<ul>
<li class="">✅ <code>current-full.csv</code> from CISA → Bronze layer</li>
<li class="">✅ Census GID CSVs → Bronze layer</li>
<li class="">✅ NCES CCD data → Bronze layer</li>
</ul>
<h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=step-2-filter>Step 2: Filter<a href=#step-2-filter class=hash-link aria-label="Direct link to Step 2: Filter" title="Direct link to Step 2: Filter" translate=no></a></h3>
<div class="language-python codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-python codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic># Create Silver layer table</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">df </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> spark</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">read</span><span class="token punctuation" style=color:#393A34>.</span><span class="token builtin">format</span><span class="token punctuation" style=color:#393A34>(</span><span class="token string" style=color:#e3116c>"delta"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">load</span><span class="token punctuation" style=color:#393A34>(</span><span class="token string" style=color:#e3116c>"bronze/gov_domains"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic># Filter for local governments</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">local_govs </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> df</span><span class="token punctuation" style=color:#393A34>.</span><span class="token builtin">filter</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">    col</span><span class="token punctuation" style=color:#393A34>(</span><span class="token string" style=color:#e3116c>"Domain Type"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">isin</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>[</span><span class="token string" style=color:#e3116c>"City"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"County"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"School District"</span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>)</span><br/></div></code></pre></div></div>
<p><strong>Result:</strong> ~8,000-10,000 high-priority targets</p>
<h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=step-3-crawl>Step 3: Crawl<a href=#step-3-crawl class=hash-link aria-label="Direct link to Step 3: Crawl" title="Direct link to Step 3: Crawl" translate=no></a></h3>
<div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">python main.py scrape-batch --source discovered --limit 50</span><br/></div></code></pre></div></div>
<p><strong>Points Scrapy agents at discovered URLs:</strong></p>
<ul>
<li class="">Homepage URLs from CISA + pattern matching</li>
<li class="">Verified with HTTP HEAD/GET requests</li>
<li class="">Prioritized by population and domain type</li>
</ul>
<h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=step-4-keyword-hunt>Step 4: Keyword Hunt<a href=#step-4-keyword-hunt class=hash-link aria-label="Direct link to Step 4: Keyword Hunt" title="Direct link to Step 4: Keyword Hunt" translate=no></a></h3>
<p><strong>Agent searches for:</strong></p>
<ul>
<li class="">"Minutes" pages</li>
<li class="">"Agendas" pages</li>
<li class="">"Meetings" pages</li>
<li class="">"Water" + "Fluoride" content</li>
</ul>
<p><strong>CMS Detection:</strong></p>
<ul>
<li class="">Granicus</li>
<li class="">CivicClerk</li>
<li class="">Municode</li>
<li class="">Legistar</li>
</ul>
<hr/>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=-non-gov-coverage>🚀 Non-.gov Coverage<a href=#-non-gov-coverage class=hash-link aria-label="Direct link to 🚀 Non-.gov Coverage" title="Direct link to 🚀 Non-.gov Coverage" translate=no></a></h2>
<p><strong>Many smaller municipalities use non-.gov domains:</strong></p>
<ul>
<li class=""><code>.org</code> (e.g., <code>cityofsomewhere.org</code>)</li>
<li class=""><code>.us</code> (e.g., <code>somewhere.ca.us</code>)</li>
<li class=""><code>.net</code> (e.g., <code>districschools.net</code>)</li>
</ul>
<p><strong>Our URL patterns cover these:</strong></p>
<div class="language-python codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-python codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic># Pattern generation includes:</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">patterns </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>[</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">    </span><span class="token string" style=color:#e3116c>"https://cityname.gov"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain">       </span><span class="token comment" style=color:#999988;font-style:italic># Primary</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">    </span><span class="token string" style=color:#e3116c>"https://cityname.us"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain">        </span><span class="token comment" style=color:#999988;font-style:italic># Alternative</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">    </span><span class="token string" style=color:#e3116c>"https://cityname.org"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain">       </span><span class="token comment" style=color:#999988;font-style:italic># Non-profit</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain">    </span><span class="token string" style=color:#e3116c>"https://cityname.net"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain">       </span><span class="token comment" style=color:#999988;font-style:italic># Legacy</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>]</span><br/></div></code></pre></div></div>
<p><strong>Future Enhancement:</strong></p>
<ul>
<li class=""><a href=https://www.statelocalgov.net/ target=_blank rel="noopener noreferrer" class="">State and Local Government on the Net</a></li>
<li class="">Could scrape this directory as fallback for missing URLs</li>
<li class="">Manually curated list of non-.gov government sites</li>
</ul>
<hr/>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=-cost-0>💰 Cost: $0<a href=#-cost-0 class=hash-link aria-label="Direct link to 💰 Cost: $0" title="Direct link to 💰 Cost: $0" translate=no></a></h2>
<p>All data sources are <strong>free and publicly available</strong>:</p>
<table><thead><tr><th>Source<th>Cost<th>Update Frequency<tbody><tr><td>CISA dotgov-data<td><strong>$0</strong><td>Daily<tr><td>Census Bureau GID<td><strong>$0</strong><td>Annual<tr><td>NCES CCD<td><strong>$0</strong><td>Annual<tr><td>Pattern Matching<td><strong>$0</strong><td>On-demand</table>
<p><strong>Total API costs:</strong> <strong>$0</strong> 🎉</p>
<p>Compare to deprecated approach:</p>
<ul>
<li class=""><del>Google Custom Search API: $5/1000 queries = ~$150</del></li>
<li class=""><del>Bing Search API: $7/1000 queries = ~$90</del></li>
</ul>
<p><strong>Savings: $240+ per discovery run</strong> ✅</p>
<hr/>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=-references>📚 References<a href=#-references class=hash-link aria-label="Direct link to 📚 References" title="Direct link to 📚 References" translate=no></a></h2>
<p><strong>Government Jurisdiction Data:</strong></p>
<ul>
<li class=""><strong>CISA .gov Domains:</strong> <a href=https://github.com/cisagov/dotgov-data target=_blank rel="noopener noreferrer" class="">https://github.com/cisagov/dotgov-data</a></li>
<li class=""><strong>Census Bureau GID:</strong> <a href=https://www.census.gov/programs-surveys/gus.html target=_blank rel="noopener noreferrer" class="">https://www.census.gov/programs-surveys/gus.html</a></li>
<li class=""><strong>NCES CCD:</strong> <a href=https://nces.ed.gov/ccd/ target=_blank rel="noopener noreferrer" class="">https://nces.ed.gov/ccd/</a></li>
<li class=""><strong>State/Local Gov Directory:</strong> <a href=https://www.statelocalgov.net/ target=_blank rel="noopener noreferrer" class="">https://www.statelocalgov.net/</a></li>
<li class=""><strong>LegiScan API:</strong> <a href=https://legiscan.com/legiscan target=_blank rel="noopener noreferrer" class="">https://legiscan.com/legiscan</a></li>
</ul>
<p><strong>Nonprofit Data:</strong>
<strong>Nonprofit Data:</strong></p>
<ul>
<li class="">See <a class="" href=/docs/data-sources/nonprofit-sources>Nonprofit Data Sources</a> for ProPublica, Charity Navigator, Candid/GuideStar, and GiveWell</li>
</ul>
<p><strong>Open Source Projects:</strong></p>
<ul>
<li class="">See <a class="" href=/docs/data-sources/open-source-repositories>Open Source Repositories</a> for civic tech projects, GitHub data, and community tools</li>
</ul>
<hr/>
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=-credits>✅ Credits<a href=#-credits class=hash-link aria-label="Direct link to ✅ Credits" title="Direct link to ✅ Credits" translate=no></a></h2>
<p><strong>System Architecture:</strong> Medallion Architecture (Bronze → Silver → Gold)<br/>
<strong>Data Engineering Pattern:</strong> Delta Lake + PySpark<br/>
<strong>Sustainable Approach:</strong> No deprecated search APIs<br/>
<strong>Guidance Source:</strong> Professional data engineering best practices</p>
<p><strong>Thank you for the excellent guidance on official data sources!</strong> 🙏</p>
<p>This system now uses <strong>the exact sources recommended by data engineers</strong> to map the U.S. government landscape. 🦷✨</div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="row margin-top--sm theme-doc-footer-edit-meta-row"><div class="col noPrint_WFHX"><a href=https://github.com/getcommunityone/open-navigator-for-engagement/tree/main/website/docs/data-sources/overview.md target=_blank rel="noopener noreferrer" class=theme-edit-this-page><svg fill=currentColor height=20 width=20 viewBox="0 0 40 40" class=iconEdit_Z9Sw aria-hidden=true><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"/></g></svg>Edit this page</a></div><div class="col lastUpdated_JAkA"></div></div></footer></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href=/docs/for-advocates><div class=pagination-nav__sublabel>Previous</div><div class=pagination-nav__label>For Policy Makers & Advocates</div></a><a class="pagination-nav__link pagination-nav__link--next" href=/docs/data-sources/citations><div class=pagination-nav__sublabel>Next</div><div class=pagination-nav__label>Data and Citations</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href=#-data-scale--coverage class="table-of-contents__link toc-highlight">📊 Data Scale & Coverage</a><li><a href=#-data-source-categories class="table-of-contents__link toc-highlight">📂 Data Source Categories</a><li><a href=#️-government-jurisdiction-data class="table-of-contents__link toc-highlight">🏛️ Government Jurisdiction Data</a><ul><li><a href=#1-cisa-gov-domain-master-list--most-authoritative class="table-of-contents__link toc-highlight">1. CISA .gov Domain Master List ⭐ <strong>Most Authoritative</strong></a><li><a href=#2-us-census-bureau---government-integrated-directory-gid class="table-of-contents__link toc-highlight">2. U.S. Census Bureau - Government Integrated Directory (GID)</a><li><a href=#3-nces-common-core-of-data-ccd class="table-of-contents__link toc-highlight">3. 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