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Vector tile generator

A repository to demo and test a few methods of generating vector tiles

Installation

Local database

The testing was done using a local database server installed on MacOS using homebrew.

brew install postgresql postgis

After these are installed you may need to run some steps to ensure the pg commands are available in your shell. See guidance online for install such as How to install PostgreSQL on a Mac with HomebrewIn some cases there can be conflicts with the default MacOS database files location, but you can initialise the data directory in a different location.

pg_ctl -D postgres start

Setup packages

The node packages are installed using npm. The package.json file contains the dependencies.

npm install

Tippecanoe

The tippecanoe method is using node but is a wrapper around a local install of tippecanoe. Tippecanoe is a command line utility for converting GeoJSON to vector tiles. It can also be installed using homebrew (or various other methods).

brew install tippecanoe

GDAL

In part of the process we generate a GeoJSON file from a CSV exported from the database. This is done using the ogr2ogr command line utility from the GDAL package. This can also be installed using homebrew.

brew install gdal

Instructions

The three different methods of generating tiles are tippecanoeBulk, vtPbfSequential and databaseSequential.

First take a copy of the sample environment file, rename to .env and update the values to match your local database and the layer you wish to convert to vector tiles. For example:

DB_TABLE=flood_risk_rivers_and_sea
DB_COLUMNS=prob_4band,suitabilit,pub_date,st_area_sh,st_perimet
MIN_ZOOM_LEVEL=4
MAX_ZOOM_LEVEL=14

When you are ready to try it out ensure you have a database running and the table you want to convert is available. Then run the following command:

node --max-old-space-size=24576 ./index.js tippecanoeBulk

Replace tippecanoeBulk with vtPbfSequential or databaseSequential to try the other methods.

Performance

Some basic timings were taken for the different methods.

FeaturesMethodTime
16Tippecanoe0.7s
16vtPbf1.7s
16PostGIS29.1s
1525731Tippecanoe449.6s

About

A repository to demo and performance test a few methods of generating vector tiles

Resources

Readme
MIT license
Activity
Custom properties

Stars

0 stars

Watchers

2 watching

Forks

0 forks
Report repository

Used by

Contributors

Languages

, '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
BranchesTags
Repository files navigation
Vector tile generator
A repository to demo and test a few methods of generating vector tiles
Installation
Local database
The testing was done using a local database server installed on MacOS using homebrew.
brew install postgresql postgis
After these are installed you may need to run some steps to ensure the pg commands are available in your shell. See guidance online for install such as How to install PostgreSQL on a Mac with HomebrewIn some cases there can be conflicts with the default MacOS database files location, but you can initialise the data directory in a different location.
pg_ctl -D postgres start
Setup packages
The node packages are installed using npm. The package.json file contains the dependencies.
npm install
Tippecanoe
The tippecanoe method is using node but is a wrapper around a local install of tippecanoe. Tippecanoe is a command line utility for converting GeoJSON to vector tiles. It can also be installed using homebrew (or various other methods).
brew install tippecanoe
GDAL
In part of the process we generate a GeoJSON file from a CSV exported from the database. This is done using the ogr2ogr command line utility from the GDAL package. This can also be installed using homebrew.
brew install gdal
Instructions
The three different methods of generating tiles are tippecanoeBulk, vtPbfSequential and databaseSequential.
First take a copy of the sample environment file, rename to .env and update the values to match your local database and the layer you wish to convert to vector tiles. For example:
DB_TABLE=flood_risk_rivers_and_sea
DB_COLUMNS=prob_4band,suitabilit,pub_date,st_area_sh,st_perimet
MIN_ZOOM_LEVEL=4
MAX_ZOOM_LEVEL=14
When you are ready to try it out ensure you have a database running and the table you want to convert is available. Then run the following command:
node --max-old-space-size=24576 ./index.js tippecanoeBulk
Replace tippecanoeBulk with vtPbfSequential or databaseSequential to try the other methods.
Performance
Some basic timings were taken for the different methods.
FeaturesMethodTime
16Tippecanoe0.7s
16vtPbf1.7s
16PostGIS29.1s
1525731Tippecanoe449.6s
About
A repository to demo and performance test a few methods of generating vector tiles
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Vector tile generator
A repository to demo and test a few methods of generating vector tiles
Installation
Local database
The testing was done using a local database server installed on MacOS using homebrew.
brew install postgresql postgis
After these are installed you may need to run some steps to ensure the pg commands are available in your shell. See guidance online for install such as How to install PostgreSQL on a Mac with HomebrewIn some cases there can be conflicts with the default MacOS database files location, but you can initialise the data directory in a different location.
pg_ctl -D postgres start
Setup packages
The node packages are installed using npm. The package.json file contains the dependencies.
npm install
Tippecanoe
The tippecanoe method is using node but is a wrapper around a local install of tippecanoe. Tippecanoe is a command line utility for converting GeoJSON to vector tiles. It can also be installed using homebrew (or various other methods).
brew install tippecanoe
GDAL
In part of the process we generate a GeoJSON file from a CSV exported from the database. This is done using the ogr2ogr command line utility from the GDAL package. This can also be installed using homebrew.
brew install gdal
Instructions
The three different methods of generating tiles are tippecanoeBulk, vtPbfSequential and databaseSequential.
First take a copy of the sample environment file, rename to .env and update the values to match your local database and the layer you wish to convert to vector tiles. For example:
DB_TABLE=flood_risk_rivers_and_sea
DB_COLUMNS=prob_4band,suitabilit,pub_date,st_area_sh,st_perimet
MIN_ZOOM_LEVEL=4
MAX_ZOOM_LEVEL=14
When you are ready to try it out ensure you have a database running and the table you want to convert is available. Then run the following command:
node --max-old-space-size=24576 ./index.js tippecanoeBulk
Replace tippecanoeBulk with vtPbfSequential or databaseSequential to try the other methods.
Performance
Some basic timings were taken for the different methods.
FeaturesMethodTime
16Tippecanoe0.7s
16vtPbf1.7s
16PostGIS29.1s
1525731Tippecanoe449.6s
About
A repository to demo and performance test a few methods of generating vector tiles
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Vector tile generator
A repository to demo and test a few methods of generating vector tiles
Installation
Local database
The testing was done using a local database server installed on MacOS using homebrew.
brew install postgresql postgis
After these are installed you may need to run some steps to ensure the pg commands are available in your shell. See guidance online for install such as How to install PostgreSQL on a Mac with HomebrewIn some cases there can be conflicts with the default MacOS database files location, but you can initialise the data directory in a different location.
pg_ctl -D postgres start
Setup packages
The node packages are installed using npm. The package.json file contains the dependencies.
npm install
Tippecanoe
The tippecanoe method is using node but is a wrapper around a local install of tippecanoe. Tippecanoe is a command line utility for converting GeoJSON to vector tiles. It can also be installed using homebrew (or various other methods).
brew install tippecanoe
GDAL
In part of the process we generate a GeoJSON file from a CSV exported from the database. This is done using the ogr2ogr command line utility from the GDAL package. This can also be installed using homebrew.
brew install gdal
Instructions
The three different methods of generating tiles are tippecanoeBulk, vtPbfSequential and databaseSequential.
First take a copy of the sample environment file, rename to .env and update the values to match your local database and the layer you wish to convert to vector tiles. For example:
DB_TABLE=flood_risk_rivers_and_sea
DB_COLUMNS=prob_4band,suitabilit,pub_date,st_area_sh,st_perimet
MIN_ZOOM_LEVEL=4
MAX_ZOOM_LEVEL=14
When you are ready to try it out ensure you have a database running and the table you want to convert is available. Then run the following command:
node --max-old-space-size=24576 ./index.js tippecanoeBulk
Replace tippecanoeBulk with vtPbfSequential or databaseSequential to try the other methods.
Performance
Some basic timings were taken for the different methods.
FeaturesMethodTime
16Tippecanoe0.7s
16vtPbf1.7s
16PostGIS29.1s
1525731Tippecanoe449.6s
About
A repository to demo and performance test a few methods of generating vector tiles
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, '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
BranchesTags
Repository files navigation
Vector tile generator
A repository to demo and test a few methods of generating vector tiles
Installation
Local database
The testing was done using a local database server installed on MacOS using homebrew.
brew install postgresql postgis
After these are installed you may need to run some steps to ensure the pg commands are available in your shell. See guidance online for install such as How to install PostgreSQL on a Mac with HomebrewIn some cases there can be conflicts with the default MacOS database files location, but you can initialise the data directory in a different location.
pg_ctl -D postgres start
Setup packages
The node packages are installed using npm. The package.json file contains the dependencies.
npm install
Tippecanoe
The tippecanoe method is using node but is a wrapper around a local install of tippecanoe. Tippecanoe is a command line utility for converting GeoJSON to vector tiles. It can also be installed using homebrew (or various other methods).
brew install tippecanoe
GDAL
In part of the process we generate a GeoJSON file from a CSV exported from the database. This is done using the ogr2ogr command line utility from the GDAL package. This can also be installed using homebrew.
brew install gdal
Instructions
The three different methods of generating tiles are tippecanoeBulk, vtPbfSequential and databaseSequential.
First take a copy of the sample environment file, rename to .env and update the values to match your local database and the layer you wish to convert to vector tiles. For example:
DB_TABLE=flood_risk_rivers_and_sea
DB_COLUMNS=prob_4band,suitabilit,pub_date,st_area_sh,st_perimet
MIN_ZOOM_LEVEL=4
MAX_ZOOM_LEVEL=14
When you are ready to try it out ensure you have a database running and the table you want to convert is available. Then run the following command:
node --max-old-space-size=24576 ./index.js tippecanoeBulk
Replace tippecanoeBulk with vtPbfSequential or databaseSequential to try the other methods.
Performance
Some basic timings were taken for the different methods.
FeaturesMethodTime
16Tippecanoe0.7s
16vtPbf1.7s
16PostGIS29.1s
1525731Tippecanoe449.6s
About
A repository to demo and performance test a few methods of generating vector tiles
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, '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
BranchesTags
Repository files navigation
Vector tile generator
A repository to demo and test a few methods of generating vector tiles
Installation
Local database
The testing was done using a local database server installed on MacOS using homebrew.
brew install postgresql postgis
After these are installed you may need to run some steps to ensure the pg commands are available in your shell. See guidance online for install such as How to install PostgreSQL on a Mac with HomebrewIn some cases there can be conflicts with the default MacOS database files location, but you can initialise the data directory in a different location.
pg_ctl -D postgres start
Setup packages
The node packages are installed using npm. The package.json file contains the dependencies.
npm install
Tippecanoe
The tippecanoe method is using node but is a wrapper around a local install of tippecanoe. Tippecanoe is a command line utility for converting GeoJSON to vector tiles. It can also be installed using homebrew (or various other methods).
brew install tippecanoe
GDAL
In part of the process we generate a GeoJSON file from a CSV exported from the database. This is done using the ogr2ogr command line utility from the GDAL package. This can also be installed using homebrew.
brew install gdal
Instructions
The three different methods of generating tiles are tippecanoeBulk, vtPbfSequential and databaseSequential.
First take a copy of the sample environment file, rename to .env and update the values to match your local database and the layer you wish to convert to vector tiles. For example:
DB_TABLE=flood_risk_rivers_and_sea
DB_COLUMNS=prob_4band,suitabilit,pub_date,st_area_sh,st_perimet
MIN_ZOOM_LEVEL=4
MAX_ZOOM_LEVEL=14
When you are ready to try it out ensure you have a database running and the table you want to convert is available. Then run the following command:
node --max-old-space-size=24576 ./index.js tippecanoeBulk
Replace tippecanoeBulk with vtPbfSequential or databaseSequential to try the other methods.
Performance
Some basic timings were taken for the different methods.
FeaturesMethodTime
16Tippecanoe0.7s
16vtPbf1.7s
16PostGIS29.1s
1525731Tippecanoe449.6s
About
A repository to demo and performance test a few methods of generating vector tiles
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Vector tile generator
A repository to demo and test a few methods of generating vector tiles
Installation
Local database
The testing was done using a local database server installed on MacOS using homebrew.
brew install postgresql postgis
After these are installed you may need to run some steps to ensure the pg commands are available in your shell. See guidance online for install such as How to install PostgreSQL on a Mac with HomebrewIn some cases there can be conflicts with the default MacOS database files location, but you can initialise the data directory in a different location.
pg_ctl -D postgres start
Setup packages
The node packages are installed using npm. The package.json file contains the dependencies.
npm install
Tippecanoe
The tippecanoe method is using node but is a wrapper around a local install of tippecanoe. Tippecanoe is a command line utility for converting GeoJSON to vector tiles. It can also be installed using homebrew (or various other methods).
brew install tippecanoe
GDAL
In part of the process we generate a GeoJSON file from a CSV exported from the database. This is done using the ogr2ogr command line utility from the GDAL package. This can also be installed using homebrew.
brew install gdal
Instructions
The three different methods of generating tiles are tippecanoeBulk, vtPbfSequential and databaseSequential.
First take a copy of the sample environment file, rename to .env and update the values to match your local database and the layer you wish to convert to vector tiles. For example:
DB_TABLE=flood_risk_rivers_and_sea
DB_COLUMNS=prob_4band,suitabilit,pub_date,st_area_sh,st_perimet
MIN_ZOOM_LEVEL=4
MAX_ZOOM_LEVEL=14
When you are ready to try it out ensure you have a database running and the table you want to convert is available. Then run the following command:
node --max-old-space-size=24576 ./index.js tippecanoeBulk
Replace tippecanoeBulk with vtPbfSequential or databaseSequential to try the other methods.
Performance
Some basic timings were taken for the different methods.
FeaturesMethodTime
16Tippecanoe0.7s
16vtPbf1.7s
16PostGIS29.1s
1525731Tippecanoe449.6s
About
A repository to demo and performance test a few methods of generating vector tiles
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, '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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Vector tile generator
A repository to demo and test a few methods of generating vector tiles
Installation
Local database
The testing was done using a local database server installed on MacOS using homebrew.
brew install postgresql postgis
After these are installed you may need to run some steps to ensure the pg commands are available in your shell. See guidance online for install such as How to install PostgreSQL on a Mac with HomebrewIn some cases there can be conflicts with the default MacOS database files location, but you can initialise the data directory in a different location.
pg_ctl -D postgres start
Setup packages
The node packages are installed using npm. The package.json file contains the dependencies.
npm install
Tippecanoe
The tippecanoe method is using node but is a wrapper around a local install of tippecanoe. Tippecanoe is a command line utility for converting GeoJSON to vector tiles. It can also be installed using homebrew (or various other methods).
brew install tippecanoe
GDAL
In part of the process we generate a GeoJSON file from a CSV exported from the database. This is done using the ogr2ogr command line utility from the GDAL package. This can also be installed using homebrew.
brew install gdal
Instructions
The three different methods of generating tiles are tippecanoeBulk, vtPbfSequential and databaseSequential.
First take a copy of the sample environment file, rename to .env and update the values to match your local database and the layer you wish to convert to vector tiles. For example:
DB_TABLE=flood_risk_rivers_and_sea
DB_COLUMNS=prob_4band,suitabilit,pub_date,st_area_sh,st_perimet
MIN_ZOOM_LEVEL=4
MAX_ZOOM_LEVEL=14
When you are ready to try it out ensure you have a database running and the table you want to convert is available. Then run the following command:
node --max-old-space-size=24576 ./index.js tippecanoeBulk
Replace tippecanoeBulk with vtPbfSequential or databaseSequential to try the other methods.
Performance
Some basic timings were taken for the different methods.
FeaturesMethodTime
16Tippecanoe0.7s
16vtPbf1.7s
16PostGIS29.1s
1525731Tippecanoe449.6s
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A repository to demo and performance test a few methods of generating vector tiles
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