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Layercake

Layercake is a set of thematic extracts of OpenStreetMap data in cloud-native file formats.

OpenStreetMap’s native file format is OSM PBF, but this 80GB ‘planet file’ is unwieldy and not supported by all GIS software. Layercake provides OSM data separated into thematic layers (buildings, transportation, etc) and converted to cloud-native file formats like GeoParquet that are easy to use with software from DuckDB to QGIS.

This repository contains the code that is used to generate the extracts, which are hosted by OpenStreetMap US at data.openstreetmap.us. Instructions on how to access the data are available on the OpenStreetMap US website.

Warning

Layercake is still experimental, and may change as it evolves. If you are interested in thematic extracts of OSM data, you can help the project's development by using it and providing feedback.

Design goals

  • Make OpenStreetMap data more accessible to the broader GIS community: Layercake organizes OpenStreetMap data into thematic layers, converts OSM's tag-based schema into columnar attributes, and transforms OSM elements into standard OGC Geometry types. This makes the data compatible with a wide array of standard GIS software and workflows.
  • Enable complex and efficient analysis: Layercake's cloud-native formats support efficient querying without needing to download all of the data first. Users can use SQL (via tools like DuckDB) to filter and download just the data that is relevant for their use case.
  • Preserve OSM's rich data model: Layercake layers contain numerous columns, representing the wide range of data that is available in OpenStreetMap. Columns correspond directly to OSM tags (in a 1:1 mapping where possible), which makes it easy to find relevant documentation on the OSM Wiki for how to interpret the data.

These goals come with some trade-offs:

  • Layercake inherits OSM's tag schema, which is complex and can even be ambiguous. Users will need to think about synonymous tags, skunked tags, and other irregularities when interpreting the data.
  • Layercake also inherits any errors in OSM data. OpenStreetMap is maintained by volunteers around the world; it may contain typos, incorrect or outdated information, and in rare cases vandalism. Layercake does not apply any quality assurance checks or make any attempt to fix or flag suspicious data.

License

Code in this repository is dedicated to the public domain via the CC0 1.0 license. You may use or modify it for any purpose, without needing to ask permission. See the LICENSE file for details.

Data from the OpenStreetMap project is licensed under ODbL. Layercake extracts are subject to the same license. You are free to copy, distribute, transmit and adapt OpenStreetMap data, as long as you credit OpenStreetMap and its contributors. If you alter or build upon our data, you may distribute the result only under the same license.

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Thematic extracts of OpenStreetMap data in cloud-native file formats

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
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Layercake
Layercake is a set of thematic extracts of OpenStreetMap data in cloud-native file formats.
OpenStreetMap’s native file format is OSM PBF, but this 80GB ‘planet file’ is unwieldy and not supported by all GIS software. Layercake provides OSM data separated into thematic layers (buildings, transportation, etc) and converted to cloud-native file formats like GeoParquet that are easy to use with software from DuckDB to QGIS.
This repository contains the code that is used to generate the extracts, which are hosted by OpenStreetMap US at data.openstreetmap.us. Instructions on how to access the data are available on the OpenStreetMap US website.
Warning
Layercake is still experimental, and may change as it evolves. If you are interested in thematic extracts of OSM data, you can help the project's development by using it and providing feedback.
Design goals
  • Make OpenStreetMap data more accessible to the broader GIS community: Layercake organizes OpenStreetMap data into thematic layers, converts OSM's tag-based schema into columnar attributes, and transforms OSM elements into standard OGC Geometry types. This makes the data compatible with a wide array of standard GIS software and workflows.
  • Enable complex and efficient analysis: Layercake's cloud-native formats support efficient querying without needing to download all of the data first. Users can use SQL (via tools like DuckDB) to filter and download just the data that is relevant for their use case.
  • Preserve OSM's rich data model: Layercake layers contain numerous columns, representing the wide range of data that is available in OpenStreetMap. Columns correspond directly to OSM tags (in a 1:1 mapping where possible), which makes it easy to find relevant documentation on the OSM Wiki for how to interpret the data.
These goals come with some trade-offs:
  • Layercake inherits OSM's tag schema, which is complex and can even be ambiguous. Users will need to think about synonymous tags, skunked tags, and other irregularities when interpreting the data.
  • Layercake also inherits any errors in OSM data. OpenStreetMap is maintained by volunteers around the world; it may contain typos, incorrect or outdated information, and in rare cases vandalism. Layercake does not apply any quality assurance checks or make any attempt to fix or flag suspicious data.
License
Code in this repository is dedicated to the public domain via the CC0 1.0 license. You may use or modify it for any purpose, without needing to ask permission. See the LICENSE file for details.
Data from the OpenStreetMap project is licensed under ODbL. Layercake extracts are subject to the same license. You are free to copy, distribute, transmit and adapt OpenStreetMap data, as long as you credit OpenStreetMap and its contributors. If you alter or build upon our data, you may distribute the result only under the same license.
About
Thematic extracts of OpenStreetMap data in cloud-native file formats
Resources
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Layercake
Layercake is a set of thematic extracts of OpenStreetMap data in cloud-native file formats.
OpenStreetMap’s native file format is OSM PBF, but this 80GB ‘planet file’ is unwieldy and not supported by all GIS software. Layercake provides OSM data separated into thematic layers (buildings, transportation, etc) and converted to cloud-native file formats like GeoParquet that are easy to use with software from DuckDB to QGIS.
This repository contains the code that is used to generate the extracts, which are hosted by OpenStreetMap US at data.openstreetmap.us. Instructions on how to access the data are available on the OpenStreetMap US website.
Warning
Layercake is still experimental, and may change as it evolves. If you are interested in thematic extracts of OSM data, you can help the project's development by using it and providing feedback.
Design goals
  • Make OpenStreetMap data more accessible to the broader GIS community: Layercake organizes OpenStreetMap data into thematic layers, converts OSM's tag-based schema into columnar attributes, and transforms OSM elements into standard OGC Geometry types. This makes the data compatible with a wide array of standard GIS software and workflows.
  • Enable complex and efficient analysis: Layercake's cloud-native formats support efficient querying without needing to download all of the data first. Users can use SQL (via tools like DuckDB) to filter and download just the data that is relevant for their use case.
  • Preserve OSM's rich data model: Layercake layers contain numerous columns, representing the wide range of data that is available in OpenStreetMap. Columns correspond directly to OSM tags (in a 1:1 mapping where possible), which makes it easy to find relevant documentation on the OSM Wiki for how to interpret the data.
These goals come with some trade-offs:
  • Layercake inherits OSM's tag schema, which is complex and can even be ambiguous. Users will need to think about synonymous tags, skunked tags, and other irregularities when interpreting the data.
  • Layercake also inherits any errors in OSM data. OpenStreetMap is maintained by volunteers around the world; it may contain typos, incorrect or outdated information, and in rare cases vandalism. Layercake does not apply any quality assurance checks or make any attempt to fix or flag suspicious data.
License
Code in this repository is dedicated to the public domain via the CC0 1.0 license. You may use or modify it for any purpose, without needing to ask permission. See the LICENSE file for details.
Data from the OpenStreetMap project is licensed under ODbL. Layercake extracts are subject to the same license. You are free to copy, distribute, transmit and adapt OpenStreetMap data, as long as you credit OpenStreetMap and its contributors. If you alter or build upon our data, you may distribute the result only under the same license.
About
Thematic extracts of OpenStreetMap data in cloud-native file formats
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Layercake
Layercake is a set of thematic extracts of OpenStreetMap data in cloud-native file formats.
OpenStreetMap’s native file format is OSM PBF, but this 80GB ‘planet file’ is unwieldy and not supported by all GIS software. Layercake provides OSM data separated into thematic layers (buildings, transportation, etc) and converted to cloud-native file formats like GeoParquet that are easy to use with software from DuckDB to QGIS.
This repository contains the code that is used to generate the extracts, which are hosted by OpenStreetMap US at data.openstreetmap.us. Instructions on how to access the data are available on the OpenStreetMap US website.
Warning
Layercake is still experimental, and may change as it evolves. If you are interested in thematic extracts of OSM data, you can help the project's development by using it and providing feedback.
Design goals
  • Make OpenStreetMap data more accessible to the broader GIS community: Layercake organizes OpenStreetMap data into thematic layers, converts OSM's tag-based schema into columnar attributes, and transforms OSM elements into standard OGC Geometry types. This makes the data compatible with a wide array of standard GIS software and workflows.
  • Enable complex and efficient analysis: Layercake's cloud-native formats support efficient querying without needing to download all of the data first. Users can use SQL (via tools like DuckDB) to filter and download just the data that is relevant for their use case.
  • Preserve OSM's rich data model: Layercake layers contain numerous columns, representing the wide range of data that is available in OpenStreetMap. Columns correspond directly to OSM tags (in a 1:1 mapping where possible), which makes it easy to find relevant documentation on the OSM Wiki for how to interpret the data.
These goals come with some trade-offs:
  • Layercake inherits OSM's tag schema, which is complex and can even be ambiguous. Users will need to think about synonymous tags, skunked tags, and other irregularities when interpreting the data.
  • Layercake also inherits any errors in OSM data. OpenStreetMap is maintained by volunteers around the world; it may contain typos, incorrect or outdated information, and in rare cases vandalism. Layercake does not apply any quality assurance checks or make any attempt to fix or flag suspicious data.
License
Code in this repository is dedicated to the public domain via the CC0 1.0 license. You may use or modify it for any purpose, without needing to ask permission. See the LICENSE file for details.
Data from the OpenStreetMap project is licensed under ODbL. Layercake extracts are subject to the same license. You are free to copy, distribute, transmit and adapt OpenStreetMap data, as long as you credit OpenStreetMap and its contributors. If you alter or build upon our data, you may distribute the result only under the same license.
About
Thematic extracts of OpenStreetMap data in cloud-native file formats
Resources
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
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Layercake
Layercake is a set of thematic extracts of OpenStreetMap data in cloud-native file formats.
OpenStreetMap’s native file format is OSM PBF, but this 80GB ‘planet file’ is unwieldy and not supported by all GIS software. Layercake provides OSM data separated into thematic layers (buildings, transportation, etc) and converted to cloud-native file formats like GeoParquet that are easy to use with software from DuckDB to QGIS.
This repository contains the code that is used to generate the extracts, which are hosted by OpenStreetMap US at data.openstreetmap.us. Instructions on how to access the data are available on the OpenStreetMap US website.
Warning
Layercake is still experimental, and may change as it evolves. If you are interested in thematic extracts of OSM data, you can help the project's development by using it and providing feedback.
Design goals
  • Make OpenStreetMap data more accessible to the broader GIS community: Layercake organizes OpenStreetMap data into thematic layers, converts OSM's tag-based schema into columnar attributes, and transforms OSM elements into standard OGC Geometry types. This makes the data compatible with a wide array of standard GIS software and workflows.
  • Enable complex and efficient analysis: Layercake's cloud-native formats support efficient querying without needing to download all of the data first. Users can use SQL (via tools like DuckDB) to filter and download just the data that is relevant for their use case.
  • Preserve OSM's rich data model: Layercake layers contain numerous columns, representing the wide range of data that is available in OpenStreetMap. Columns correspond directly to OSM tags (in a 1:1 mapping where possible), which makes it easy to find relevant documentation on the OSM Wiki for how to interpret the data.
These goals come with some trade-offs:
  • Layercake inherits OSM's tag schema, which is complex and can even be ambiguous. Users will need to think about synonymous tags, skunked tags, and other irregularities when interpreting the data.
  • Layercake also inherits any errors in OSM data. OpenStreetMap is maintained by volunteers around the world; it may contain typos, incorrect or outdated information, and in rare cases vandalism. Layercake does not apply any quality assurance checks or make any attempt to fix or flag suspicious data.
License
Code in this repository is dedicated to the public domain via the CC0 1.0 license. You may use or modify it for any purpose, without needing to ask permission. See the LICENSE file for details.
Data from the OpenStreetMap project is licensed under ODbL. Layercake extracts are subject to the same license. You are free to copy, distribute, transmit and adapt OpenStreetMap data, as long as you credit OpenStreetMap and its contributors. If you alter or build upon our data, you may distribute the result only under the same license.
About
Thematic extracts of OpenStreetMap data in cloud-native file formats
Resources
Readme
License
Contributing
Contributing
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0 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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Layercake
Layercake is a set of thematic extracts of OpenStreetMap data in cloud-native file formats.
OpenStreetMap’s native file format is OSM PBF, but this 80GB ‘planet file’ is unwieldy and not supported by all GIS software. Layercake provides OSM data separated into thematic layers (buildings, transportation, etc) and converted to cloud-native file formats like GeoParquet that are easy to use with software from DuckDB to QGIS.
This repository contains the code that is used to generate the extracts, which are hosted by OpenStreetMap US at data.openstreetmap.us. Instructions on how to access the data are available on the OpenStreetMap US website.
Warning
Layercake is still experimental, and may change as it evolves. If you are interested in thematic extracts of OSM data, you can help the project's development by using it and providing feedback.
Design goals
  • Make OpenStreetMap data more accessible to the broader GIS community: Layercake organizes OpenStreetMap data into thematic layers, converts OSM's tag-based schema into columnar attributes, and transforms OSM elements into standard OGC Geometry types. This makes the data compatible with a wide array of standard GIS software and workflows.
  • Enable complex and efficient analysis: Layercake's cloud-native formats support efficient querying without needing to download all of the data first. Users can use SQL (via tools like DuckDB) to filter and download just the data that is relevant for their use case.
  • Preserve OSM's rich data model: Layercake layers contain numerous columns, representing the wide range of data that is available in OpenStreetMap. Columns correspond directly to OSM tags (in a 1:1 mapping where possible), which makes it easy to find relevant documentation on the OSM Wiki for how to interpret the data.
These goals come with some trade-offs:
  • Layercake inherits OSM's tag schema, which is complex and can even be ambiguous. Users will need to think about synonymous tags, skunked tags, and other irregularities when interpreting the data.
  • Layercake also inherits any errors in OSM data. OpenStreetMap is maintained by volunteers around the world; it may contain typos, incorrect or outdated information, and in rare cases vandalism. Layercake does not apply any quality assurance checks or make any attempt to fix or flag suspicious data.
License
Code in this repository is dedicated to the public domain via the CC0 1.0 license. You may use or modify it for any purpose, without needing to ask permission. See the LICENSE file for details.
Data from the OpenStreetMap project is licensed under ODbL. Layercake extracts are subject to the same license. You are free to copy, distribute, transmit and adapt OpenStreetMap data, as long as you credit OpenStreetMap and its contributors. If you alter or build upon our data, you may distribute the result only under the same license.
About
Thematic extracts of OpenStreetMap data in cloud-native file formats
Resources
Readme
License
Contributing
Contributing
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Layercake
Layercake is a set of thematic extracts of OpenStreetMap data in cloud-native file formats.
OpenStreetMap’s native file format is OSM PBF, but this 80GB ‘planet file’ is unwieldy and not supported by all GIS software. Layercake provides OSM data separated into thematic layers (buildings, transportation, etc) and converted to cloud-native file formats like GeoParquet that are easy to use with software from DuckDB to QGIS.
This repository contains the code that is used to generate the extracts, which are hosted by OpenStreetMap US at data.openstreetmap.us. Instructions on how to access the data are available on the OpenStreetMap US website.
Warning
Layercake is still experimental, and may change as it evolves. If you are interested in thematic extracts of OSM data, you can help the project's development by using it and providing feedback.
Design goals
  • Make OpenStreetMap data more accessible to the broader GIS community: Layercake organizes OpenStreetMap data into thematic layers, converts OSM's tag-based schema into columnar attributes, and transforms OSM elements into standard OGC Geometry types. This makes the data compatible with a wide array of standard GIS software and workflows.
  • Enable complex and efficient analysis: Layercake's cloud-native formats support efficient querying without needing to download all of the data first. Users can use SQL (via tools like DuckDB) to filter and download just the data that is relevant for their use case.
  • Preserve OSM's rich data model: Layercake layers contain numerous columns, representing the wide range of data that is available in OpenStreetMap. Columns correspond directly to OSM tags (in a 1:1 mapping where possible), which makes it easy to find relevant documentation on the OSM Wiki for how to interpret the data.
These goals come with some trade-offs:
  • Layercake inherits OSM's tag schema, which is complex and can even be ambiguous. Users will need to think about synonymous tags, skunked tags, and other irregularities when interpreting the data.
  • Layercake also inherits any errors in OSM data. OpenStreetMap is maintained by volunteers around the world; it may contain typos, incorrect or outdated information, and in rare cases vandalism. Layercake does not apply any quality assurance checks or make any attempt to fix or flag suspicious data.
License
Code in this repository is dedicated to the public domain via the CC0 1.0 license. You may use or modify it for any purpose, without needing to ask permission. See the LICENSE file for details.
Data from the OpenStreetMap project is licensed under ODbL. Layercake extracts are subject to the same license. You are free to copy, distribute, transmit and adapt OpenStreetMap data, as long as you credit OpenStreetMap and its contributors. If you alter or build upon our data, you may distribute the result only under the same license.
About
Thematic extracts of OpenStreetMap data in cloud-native file formats
Resources
Readme
License
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
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Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Layercake
Layercake is a set of thematic extracts of OpenStreetMap data in cloud-native file formats.
OpenStreetMap’s native file format is OSM PBF, but this 80GB ‘planet file’ is unwieldy and not supported by all GIS software. Layercake provides OSM data separated into thematic layers (buildings, transportation, etc) and converted to cloud-native file formats like GeoParquet that are easy to use with software from DuckDB to QGIS.
This repository contains the code that is used to generate the extracts, which are hosted by OpenStreetMap US at data.openstreetmap.us. Instructions on how to access the data are available on the OpenStreetMap US website.
Warning
Layercake is still experimental, and may change as it evolves. If you are interested in thematic extracts of OSM data, you can help the project's development by using it and providing feedback.
Design goals
  • Make OpenStreetMap data more accessible to the broader GIS community: Layercake organizes OpenStreetMap data into thematic layers, converts OSM's tag-based schema into columnar attributes, and transforms OSM elements into standard OGC Geometry types. This makes the data compatible with a wide array of standard GIS software and workflows.
  • Enable complex and efficient analysis: Layercake's cloud-native formats support efficient querying without needing to download all of the data first. Users can use SQL (via tools like DuckDB) to filter and download just the data that is relevant for their use case.
  • Preserve OSM's rich data model: Layercake layers contain numerous columns, representing the wide range of data that is available in OpenStreetMap. Columns correspond directly to OSM tags (in a 1:1 mapping where possible), which makes it easy to find relevant documentation on the OSM Wiki for how to interpret the data.
These goals come with some trade-offs:
  • Layercake inherits OSM's tag schema, which is complex and can even be ambiguous. Users will need to think about synonymous tags, skunked tags, and other irregularities when interpreting the data.
  • Layercake also inherits any errors in OSM data. OpenStreetMap is maintained by volunteers around the world; it may contain typos, incorrect or outdated information, and in rare cases vandalism. Layercake does not apply any quality assurance checks or make any attempt to fix or flag suspicious data.
License
Code in this repository is dedicated to the public domain via the CC0 1.0 license. You may use or modify it for any purpose, without needing to ask permission. See the LICENSE file for details.
Data from the OpenStreetMap project is licensed under ODbL. Layercake extracts are subject to the same license. You are free to copy, distribute, transmit and adapt OpenStreetMap data, as long as you credit OpenStreetMap and its contributors. If you alter or build upon our data, you may distribute the result only under the same license.
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Thematic extracts of OpenStreetMap data in cloud-native file formats
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