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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="" xml:lang="">
<head>
<meta charset="utf-8" />
<meta name="generator" content="pandoc" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
<title>Tiny World Map 3: Stealing Vertices From Fjords</title>
<style>
html {
line-height: 1.5;
font-family: Georgia, serif;
font-size: 20px;
color: #1a1a1a;
background-color: #fdfdfd;
}
body {
margin: 0 auto;
max-width: 36em;
padding-left: 50px;
padding-right: 50px;
padding-top: 50px;
padding-bottom: 50px;
hyphens: auto;
overflow-wrap: break-word;
text-rendering: optimizeLegibility;
font-kerning: normal;
}
@media (max-width: 600px) {
body {
font-size: 0.9em;
padding: 1em;
}
h1 {
font-size: 1.8em;
}
}
@media print {
body {
background-color: transparent;
color: black;
font-size: 12pt;
}
p, h2, h3 {
orphans: 3;
widows: 3;
}
h2, h3, h4 {
page-break-after: avoid;
}
}
p {
margin: 1em 0;
}
a {
color: #1a1a1a;
}
a:visited {
color: #1a1a1a;
}
img {
max-width: 100%;
}
h1, h2, h3, h4, h5, h6 {
margin-top: 1.4em;
}
h5, h6 {
font-size: 1em;
font-style: italic;
}
h6 {
font-weight: normal;
}
ol, ul {
padding-left: 1.7em;
margin-top: 1em;
}
li > ol, li > ul {
margin-top: 0;
}
blockquote {
margin: 1em 0 1em 1.7em;
padding-left: 1em;
border-left: 2px solid #e6e6e6;
color: #606060;
}
code {
font-family: Menlo, Monaco, 'Lucida Console', Consolas, monospace;
font-size: 85%;
margin: 0;
}
pre {
margin: 1em 0;
overflow: auto;
}
pre code {
padding: 0;
overflow: visible;
overflow-wrap: normal;
}
.sourceCode {
background-color: transparent;
overflow: visible;
}
hr {
background-color: #1a1a1a;
border: none;
height: 1px;
margin: 1em 0;
}
table {
margin: 1em 0;
border-collapse: collapse;
width: 100%;
overflow-x: auto;
display: block;
font-variant-numeric: lining-nums tabular-nums;
}
table caption {
margin-bottom: 0.75em;
}
tbody {
margin-top: 0.5em;
border-top: 1px solid #1a1a1a;
border-bottom: 1px solid #1a1a1a;
}
th {
border-top: 1px solid #1a1a1a;
padding: 0.25em 0.5em 0.25em 0.5em;
}
td {
padding: 0.125em 0.5em 0.25em 0.5em;
}
header {
margin-bottom: 4em;
text-align: center;
}
#TOC li {
list-style: none;
}
#TOC ul {
padding-left: 1.3em;
}
#TOC > ul {
padding-left: 0;
}
#TOC a:not(:hover) {
text-decoration: none;
}
code{white-space: pre-wrap;}
span.smallcaps{font-variant: small-caps;}
div.columns{display: flex; gap: min(4vw, 1.5em);}
div.column{flex: auto; overflow-x: auto;}
div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
ul.task-list{list-style: none;}
ul.task-list li input[type="checkbox"] {
width: 0.8em;
margin: 0 0.8em 0.2em -1.6em;
vertical-align: middle;
}
.display.math{display: block; text-align: center; margin: 0.5rem auto;}
</style>
<!--[if lt IE 9]>
<script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
<![endif]-->
</head>
<body>
<h1 id="tiny-world-map-3">Tiny World Map 3</h1>
<div id="topmap"
style="width: 100%; height: 275px; font-size: 12px !important;">
</div>
<script src="dist/beta/tiny-world-all-10000.js"></script>
<script>
var map2 = L.map(
"topmap",
{
center: [40.0, 15.0],
crs: L.CRS.EPSG3857,
zoom: 3,
zoomControl: false,
preferCanvas: true,
worldCopyJump: true,
}
);
L.control.scale().addTo(map2);
new L.GridLayer.TinyWorld({maxZoom: 19}).addTo(map2)
</script>
<p>Two weeks ago, we released <a
href="https://github.com/tinyworldmap/tiny-world-map">tinyworldmap</a>,
a world map for offline-first and low-bandwidth web apps. It was
originally developed as a simple offline fallback for OpenStreetMap
tiles. The most complete version, shown above, is only 450 kB
gzipped.</p>
<h2 id="stealing-vertices-from-fjords">Stealing Vertices From
Fjords</h2>
<p>With quite a few websites already using the map after two weeks, the
reception was very positive. Still, it was clear that a less coarse map
would be preferred. In the days following the release, people gently
reminded us that both the Caspian Sea and the Great Lakes were shown as
land, that many islands were missing, that half of our (not their, our)
home country looked like it was about to drift into sea, and that some
UK towns were already underwater.</p>
<p>In tinyworldmap’s third release, this has all been fixed. Scroll
horizontally to see the original version:</p>
<style>img, #topmap {border: 1px solid black;}</style>
<div style="overflow-x: scroll;">
<div style="width: 950px;">
<img src="images/3/nl-nice.png"> <img src="images/3/nl-bad.png">
</div>
<div style="width: 950px;">
<img src="images/3/great-lakes-good.png">
<img src="images/3/great-lakes-bad.png">
</div>
</div>
</div>
<p>Although the additional detail has resulted in a slightly bigger file
(~450K gzipped), most of the vertices were obtained by smoothing
sparsely populated areas with complex shorelines. We dedicated
considerable effort to ensure the smoothed shores blend into the overall
map style.</p>
<h2 id="altering-the-map-appearance">Altering the Map Appearance</h2>
<p>You can now do this:</p>
<div id="map"
style="width: 100%; height: 400px; font-size: 12px !important;">
</div>
<script>
var map = L.map(
"map",
{
center: [40.0, 15.0],
crs: L.CRS.EPSG3857,
zoom: 3,
zoomControl: false,
preferCanvas: true,
worldCopyJump: true,
}
);
L.control.scale().addTo(map);
let img = Object.assign(new Image(), {src: 'images/3/sea+water.png'})
let img2 = Object.assign(new Image(), {src: 'images/3/gray+stone.png'})
let loaded = 0
img.onload = img2.onload = () => {
if (++loaded != 2)
return
let render = {
background: {
style: {fillStyle: ctx => ctx.createPattern(img, 'repeat')}
},
lakes: {
style: {fillStyle: ctx => ctx.createPattern(img, 'repeat'), strokeStyle: 'black'}
},
country_borders: {
style: {
// fillStyle: '#cbf078',
fillStyle: ctx => ctx.createPattern(img2, 'repeat'),
strokeStyle: 'black',
lineWidth: 1,
shadowBlur: 15,
shadowColor: 'rgba(0,0,0,.3)'
},
},
state_borders: {
style: {
fillStyle: 'transparent',
strokeStyle: 'black',
lineWidth: 0.5
},
options: {minZoom: 4}
},
country_labels: {
style: {
font: 'bold 14px monospace',
strokeStyle: 'rgba(255,255,255,.9)',
fillStyle: 'black',
lineWidth: 3,
},
options: {
maxWidth: 100
}
},
city_labels: {
style: {
font: '12px monospace',
strokeStyle: 'rgba(255,255,255,.7)',
fillStyle: 'black',
lineWidth: 3,
},
options: {
maxWidth: 100
}
}
}
new L.GridLayer.TinyWorld({maxZoom: 19, render}).addTo(map)
}
</script>
<p>For every map layer, any <a
href="https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D">property</a>
can be set on the canvas rendering context. More info can be found in
our <a
href="https://github.com/tinyworldmap/tiny-world-map?tab=readme-ov-file#altering-the-map-appearance">documentation</a>.
Of course, because the map is rendered client-side, excessive use of
shadows, filters and textures will slow down older devices.</p>
<h2 id="a-note-on-custom-content-maps">A Note On Custom-Content
Maps</h2>
<p>We have received a lot of questions from people who would like to
create custom-content maps themselves. Road maps, city maps, detail
maps, translated maps, you name it.</p>
<p>Currently, the only way to obtain a custom map is by hiring us. I’d
love to document and open-source the code, and make the entire process
more reproducible and less dependent on manual changes, but that
requires both a lot of time and may hurt our business. In other words,
we would need an alternative source of funding.</p>
<p>If you are interested in providing funding or if you know of an
organization that might be, <a
know</a>!</p>
<p><br><br><br></p>
<p><small>© tinyworldmap</small></p>
</body>
</html>