Demonstrates how to load SVG's as Leaflet icons via the data URI method.
Following was helpful to figure this out:
This block is a modified example taken from Working with spatial data.
Built with blockbuilder.org
forked from enjalot's block: WWSD #1: Leaflet starter
forked from enjalot's block: WWSD #1: Leaflet starter
| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.css" /> | |
| <script src="http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| #map { | |
| height: 100%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map"></div> | |
| <script> | |
| var map = L.map('map').setView([30, 0], 2); | |
| L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', { | |
| attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors' | |
| }).addTo(map); | |
| var CustomIcon = L.Icon.extend({ | |
| options: { | |
| iconSize: [40, 40], | |
| shadowSize: [50, 64], | |
| iconAnchor: [22, 94], | |
| shadowAnchor: [4, 62], | |
| popupAnchor: [-3, -76] | |
| } | |
| }); | |
| var svgrect = "<svg xmlns='http://www.w3.org/2000/svg'><rect x='0' y='0' width='20' height='10' fill='#5a7cd2'></rect><rect x='0' y='15' width='20' height='10' fill='#5d52cf'></rect></svg>"; | |
| /* | |
| For data URI SVG support in Firefox & IE it's necessary to URI encode the string | |
| & replace the '#' character with '%23'. `encodeURI()` won't do this which is | |
| why `replace()` must be used on the string afterwards. | |
| */ | |
| var url = encodeURI("data:image/svg+xml," + svgrect).replace('#','%23'); | |
| console.log(url); | |
| var rectIcon = new CustomIcon({iconUrl: url}) | |
| L.marker([52, -0.09], {icon: rectIcon}).bindPopup("I am data URI SVG icon.").addTo(map); | |
| </script> | |
| </body> |
@clhenrick That's brilliant. Thanks a lot mate. I was pooping around with creating dom objects from my xml string. Didn't even think about encoded URI. Works a treat.
@adelaide01 You can pass anything into icon url used in the LeafletJS icon object. Let me answer your stackoverflow question. I am sure somebody else would have already solved this if posted in the gis stackexchange where all the LeafletJS cracks hang out.
let mySvgString = '<svg width="866" height="1000" xmlns="http://www.w3.org/2000/svg"><metadata id="metadata1">image/svg+xml</metadata><circle fill="#fee08b" cx="466" cy="532" r="395"/><circle fill="#ffffbf" cx="400" cy="468" r="395"/></svg>'
let myIconUrl = encodeURI("data:image/svg+xml," + mySvgString).replace('#','%23');
L.icon({
iconUrl: myIconUrl,
iconSize: 40
});This is what I use to create maps like this:
@dbauszus-glx Perfect! Thanks for taking the time. I'll accept your answer on StackOverflow and consider gis stackexchange in the future for Leaflet related questions.
Thanks a lot for taking the time document this gist. While dabbling around I came across another way to use inline SVG as a marker, using L.divIcon, maybe it helps someone:
L.divIcon({ html: $(marker_svg)[0].outerHTML, // svgrect iconSize: [24, 38], iconAnchor: [12, 38] })
Thanks man! That works perfectly!
Thank you, it was very useful.
I had more than one #, so the replacement is like: .replace(new RegExp('#', 'g'),'%23').
How apply some external styles like :hover un such URI encoded svg? Can't find any solutions except css filter which is too basic. Let's say i want to pass data into my svg like this:
let svgicon = `<svg id='marker` + markers[i][4] + `' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'>
<defs>
<style>
.cls-1 {
fill: #006aff;
}
.cls-2 {
font-size: 28px;
fill: #fff;
font-family: Montserrat-Regular, Montserrat;
}
</style>
</defs>
<path class="cls-1" d="M56.9679,24.9679A24.9679,24.9679,0,1,0,12.38928,40.42236h-.00067l18.4848,22.96552a1.38676,1.38676,0,0,0,2.22162.10583l17.86951-22.285H50.963A24.86853,24.86853,0,0,0,56.9679,24.9679Z"/>
<text id='label` + markers[i][4] + `' class='cls-2' transform='translate(32 34)' text-anchor='middle'>` + markers[i][1] + `</text>
</svg>`
See that + markers[i][1] + in <text> tag...? This is important for me to pass some information to marker itself.
Then i encode it let url = encodeURI('data:image/svg+xml;utf8,' + svgicon).replace('#','%23'); ... and then all the rest stuff.
So... next thing is... i want to apply some custom styling for stroke, fill and the rest properties, when user hovers on this icon. Or if some events happen.
Have anybody any ideas?
I can't use there <svg><use xlink:href="file.svg#my-icon"> coz' i don't see a way to inject my dynamic text. Otherwise there would no be a problem to style it.
Swapping different styled svg icons ... is kind a solution, but i do not prefer it.
I found your approach much more useful, @stefanolaru . Thanks a lot for sharing :)
@stefanolaru it worked to me. Thanks
Thanks for the code. For others reading this, I found the following works better (for me at least) than encodeURI:
var url = "data:image/svg+xml," + encodeURIComponent(svg);
This allow double-quotes in the SVG and no need to do the additional replace on hashes.
Thanks @DynamicArray. var url = "data:image/svg+xml," + encodeURIComponent(svg); is the only code that worked for me
@chris I appreciate your example. However, I can only pass in SVG rectangles, but not circles or paths. I just posted a question in StackOverflow about it. Do you know the answer? https://stackoverflow.com/questions/45110081/svg-icons-in-leaflet-js-map