https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/v1

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    "excerpt": "De 3D Basisvoorziening is een verzameling van ruimtelijke bestanden die hoogte informatie bevatten. Deze bestanden (collecties) worden op verschillende manieren gegenereerd. Er zijn acht collecties beschikbaar.  De 3D Basisvoorziening kan gebruikt worden op schaalniveaus tussen 1:500 en 1:10.000. De bestanden zijn o.a. gebaseerd op topografie uit de Basisregistratie Grootschalige Topografie (BGT), de gebouwen uit de Basisregistratie Adressen en Gebouwen (BAG), en hoogtes uit luchtfotobeelden en het Actueel Hoogtebestand Nederland (AHN).  Meer informatie over deze dataset en overige producten zoals het downloaden van deze dataset voor analysedoeleinden of een 3D Viewer zijn te vinden op de website van PDOK en in de productbeschrijving.",
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  "markdown": "De 3D Basisvoorziening is een verzameling van ruimtelijke bestanden die hoogte informatie bevatten. Deze bestanden (collecties) worden op verschillende manieren gegenereerd. Er zijn acht collecties beschikbaar.\n\nDe 3D Basisvoorziening kan gebruikt worden op schaalniveaus tussen 1:500 en 1:10.000. De bestanden zijn o.a. gebaseerd op topografie uit de Basisregistratie Grootschalige Topografie (BGT), de gebouwen uit de Basisregistratie Adressen en Gebouwen (BAG), en hoogtes uit luchtfotobeelden en het Actueel Hoogtebestand Nederland (AHN).\n\nMeer informatie over deze dataset en overige producten zoals het downloaden van deze dataset voor analysedoeleinden of een [3D Viewer](https://app.pdok.nl/3d-viewer/) zijn te vinden op de [website van PDOK](https://www.pdok.nl/introductie/-/article/3d-basisvoorziening-1) en in de [productbeschrijving](https://3d.kadaster.nl/productbeschrijving/).\n\nDataset details\n| Keywords | 3D Basisbestand, gebouwen, terreinen, water, wegen, DTM, DSM, AHN, hoogte attributen |\n| License | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/deed.nl) |\n| Support | [PDOK Support](https://www.pdok.nl/support) |\n| Metadata for OGC API 3D Geovolumes | [View at Nationaal Georegister](https://nationaalgeoregister.nl/geonetwork/srv/dut/catalog.search#/metadata/335a62b6-ee20-405a-8dca-45995bee2615) |\n| Metadata for OGC API Features | [View at Nationaal Georegister](https://nationaalgeoregister.nl/geonetwork/srv/dut/catalog.search#/metadata/364ade50-5aae-4420-9d9b-ad4ebca2d032) |\n| Metadata for dataset | [View at Nationaal Georegister](https://nationaalgeoregister.nl/geonetwork/srv/dut/catalog.search#/metadata/2fdeecd0-3d28-43f9-894e-e8444fdffeb3) |\n| Dataset-aanbieder |\n\nKadaster (3D Basisvoorziening)\n\n |\n| Updatefrequentie |\n\nJaarlijks\n\n |\n| Dienstverlening |\n\n[Producten- en Diensten Catalogus](https://www.pdok.nl/producten-en-dienstencatalogi)\n\n |\n| Kosten afname |\n\nGeen\n\n |\n| Authenticatie |\n\nGeen\n\n |\n",
  "fullPageMarkdown": "3D Basisvoorziening (OGC API)\n\n[To main content](https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/v1#main)\n\n# 3D Basisvoorziening (OGC API)\n\nDe 3D Basisvoorziening is een verzameling van ruimtelijke bestanden die hoogte informatie bevatten. Deze bestanden (collecties) worden op verschillende manieren gegenereerd. Er zijn acht collecties beschikbaar.\n\nDe 3D Basisvoorziening kan gebruikt worden op schaalniveaus tussen 1:500 en 1:10.000. De bestanden zijn o.a. gebaseerd op topografie uit de Basisregistratie Grootschalige Topografie (BGT), de gebouwen uit de Basisregistratie Adressen en Gebouwen (BAG), en hoogtes uit luchtfotobeelden en het Actueel Hoogtebestand Nederland (AHN).\n\nMeer informatie over deze dataset en overige producten zoals het downloaden van deze dataset voor analysedoeleinden of een [3D Viewer](https://app.pdok.nl/3d-viewer/) zijn te vinden op de [website van PDOK](https://www.pdok.nl/introductie/-/article/3d-basisvoorziening-1) en in de [productbeschrijving](https://3d.kadaster.nl/productbeschrijving/).\n\nDataset details\n| Keywords | 3D Basisbestand, gebouwen, terreinen, water, wegen, DTM, DSM, AHN, hoogte attributen |\n| License | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/deed.nl) |\n| Support | [PDOK Support](https://www.pdok.nl/support) |\n| Metadata for OGC API 3D Geovolumes | [View at Nationaal Georegister](https://nationaalgeoregister.nl/geonetwork/srv/dut/catalog.search#/metadata/335a62b6-ee20-405a-8dca-45995bee2615) |\n| Metadata for OGC API Features | [View at Nationaal Georegister](https://nationaalgeoregister.nl/geonetwork/srv/dut/catalog.search#/metadata/364ade50-5aae-4420-9d9b-ad4ebca2d032) |\n| Metadata for dataset | [View at Nationaal Georegister](https://nationaalgeoregister.nl/geonetwork/srv/dut/catalog.search#/metadata/2fdeecd0-3d28-43f9-894e-e8444fdffeb3) |\n| Dataset-aanbieder |\n\nKadaster (3D Basisvoorziening)\n\n |\n| Updatefrequentie |\n\nJaarlijks\n\n |\n| Dienstverlening |\n\n[Producten- en Diensten Catalogus](https://www.pdok.nl/producten-en-dienstencatalogi)\n\n |\n| Kosten afname |\n\nGeen\n\n |\n| Authenticatie |\n\nGeen\n\n |\n\n![3D Basisvoorziening Thumbnail](https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/resources/3d.png)\n\n## [OpenAPI specification](https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/api)\n\nThe specification in OpenAPI v3 format describes the OGC API in such a way that both humans and computers can explore the API's options. It shows both in- and output options, and helps to quickly generate a first working API call with the desired result. The page is available in both HTML and JSON.\n\nView as [JSON](https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/api?f=json)\n\n## [Conformance](https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/conformance)\n\nThe conformance describes which OGC standards this API implements. The page is available in both HTML and JSON.\n\nView as [JSON](https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/conformance?f=json)\n\n## [Collections](https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/collections)\n\nThis API offers one or more collections that divide the dataset in various object types, which can be called separately through for instance *features* or *tiles*. The page is available in both HTML and JSON.\n\nView as [JSON](https://api.pdok.nl/kadaster/3d-basisvoorziening/ogc/collections?f=json)\n",
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          "language": "nginx",
          "filename": "server block",
          "code": "# Inside your server { } block:\nadd_header Content-Signal \"search=yes, ai-input=yes, ai-train=no\" always;"
        },
        {
          "id": "apache",
          "label": "Apache",
          "language": "apache",
          "filename": ".htaccess",
          "code": "# In .htaccess (or VirtualHost):\nHeader set Content-Signal \"search=yes, ai-input=yes, ai-train=no\""
        },
        {
          "id": "wordpress",
          "label": "WordPress",
          "language": "php",
          "filename": "functions.php",
          "code": "<?php\n// In your theme's functions.php or a small mu-plugin\nadd_action('send_headers', function () {\n    header('Content-Signal: search=yes, ai-input=yes, ai-train=no');\n});\n\n// Optional: also append the directive to the dynamic robots.txt\nadd_filter('robots_txt', function ($output) {\n    return $output . \"\\nContent-Signal: search=yes, ai-input=yes, ai-train=no\\n\";\n}, 10, 1);"
        },
        {
          "id": "nextjs",
          "label": "Next.js",
          "language": "typescript",
          "filename": "middleware.ts",
          "code": "// middleware.ts (Next.js 13+ App Router or Pages Router)\nimport { NextResponse } from 'next/server';\nexport function middleware() {\n  const res = NextResponse.next();\n  res.headers.set(\n    'Content-Signal',\n    'search=yes, ai-input=yes, ai-train=no'\n  );\n  return res;\n}\nexport const config = { matcher: '/:path*' };"
        },
        {
          "id": "cloudflare",
          "label": "Cloudflare Workers",
          "language": "javascript",
          "filename": "worker.js",
          "code": "// Cloudflare Worker that proxies your origin and adds the header\nexport default {\n  async fetch(request, env, ctx) {\n    const res = await fetch(request);\n    const newRes = new Response(res.body, res);\n    newRes.headers.set(\n      'Content-Signal',\n      'search=yes, ai-input=yes, ai-train=no'\n    );\n    return newRes;\n  },\n};"
        },
        {
          "id": "express",
          "label": "Express / Fastify",
          "language": "javascript",
          "filename": "server.js",
          "code": "// Express\napp.use((req, res, next) => {\n  res.setHeader('Content-Signal', 'search=yes, ai-input=yes, ai-train=no');\n  next();\n});\n\n// Fastify\nfastify.addHook('onSend', (request, reply, payload, done) => {\n  reply.header('Content-Signal', 'search=yes, ai-input=yes, ai-train=no');\n  done();\n});"
        }
      ]
    },
    {
      "id": "add_markdown_negotiation",
      "title": "Support Markdown for Agents",
      "description": "Let AI agents request a clean Markdown version of any page via content negotiation, .md alternate URLs, link tags or Link headers.",
      "language": "html",
      "code": "<!-- Mechanism 3: link tag advertising the .md alternate -->\n<link rel=\"alternate\" type=\"text/markdown\" href=\"/page.md\">",
      "filename": "<head>",
      "stacks": [
        {
          "id": "html",
          "label": "HTML <head>",
          "language": "html",
          "filename": "<head>",
          "code": "<!-- Mechanism 3: link tag advertising the .md alternate -->\n<link rel=\"alternate\" type=\"text/markdown\" href=\"/page.md\">"
        },
        {
          "id": "express",
          "label": "Express",
          "language": "javascript",
          "filename": "server.js",
          "code": "// Mechanisms 1 + 4: content negotiation + Link header\napp.get('/page', (req, res) => {\n  res.setHeader('Vary', 'Accept');\n  res.setHeader('Link', '</page.md>; rel=\"alternate\"; type=\"text/markdown\"');\n  if ((req.headers.accept || '').includes('text/markdown')) {\n    res.type('text/markdown; charset=utf-8');\n    return res.send(renderMarkdown('page'));\n  }\n  res.render('page');\n});"
        },
        {
          "id": "fastify",
          "label": "Fastify",
          "language": "javascript",
          "filename": "server.js",
          "code": "// Mechanisms 1 + 4: content negotiation + Link header\nfastify.get('/page', async (req, reply) => {\n  reply.header('Vary', 'Accept');\n  reply.header('Link', '</page.md>; rel=\"alternate\"; type=\"text/markdown\"');\n  if ((req.headers.accept || '').includes('text/markdown')) {\n    return reply.type('text/markdown; charset=utf-8').send(renderMarkdown('page'));\n  }\n  return reply.view('/page.ejs');\n});"
        },
        {
          "id": "nextjs",
          "label": "Next.js",
          "language": "typescript",
          "filename": "app/page/route.ts",
          "code": "// Next.js App Router — Route Handler returning Markdown\nimport { NextRequest } from 'next/server';\nimport { renderMarkdown } from '@/lib/md';\nexport async function GET(req: NextRequest) {\n  const accept = req.headers.get('accept') || '';\n  if (accept.includes('text/markdown')) {\n    return new Response(await renderMarkdown('page'), {\n      headers: {\n        'Content-Type': 'text/markdown; charset=utf-8',\n        'Vary': 'Accept',\n      },\n    });\n  }\n  // Fall through to the page component\n  return new Response(null, { status: 404 });\n}"
        },
        {
          "id": "wordpress",
          "label": "WordPress",
          "language": "php",
          "filename": "functions.php",
          "code": "<?php\n// Mechanism 1: respond to Accept: text/markdown on the same URL\nadd_action('template_redirect', function () {\n    if (!is_singular()) return;\n    $accept = $_SERVER['HTTP_ACCEPT'] ?? '';\n    if (strpos($accept, 'text/markdown') === false) return;\n    header('Content-Type: text/markdown; charset=utf-8');\n    header('Vary: Accept');\n    $post = get_queried_object();\n    echo \"# \" . get_the_title($post) . \"\\n\\n\";\n    echo wp_strip_all_tags(apply_filters('the_content', $post->post_content));\n    exit;\n});"
        },
        {
          "id": "static",
          "label": "Hugo / Jekyll / Astro",
          "language": "txt",
          "filename": "static/page.md",
          "code": "# Mechanism 2: serve .md alongside .html\n# Hugo: place page.md in /static/ — built unchanged\n# Jekyll: drop page.md in /assets/ — copied as-is\n# Astro: src/pages/page.md.ts that exports a GET returning markdown\n\n# Then advertise with mechanism 3 in <head>:\n#   <link rel=\"alternate\" type=\"text/markdown\" href=\"/page.md\">"
        }
      ]
    }
  ]
}

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