Leaflet是非地图图像的好工具吗? [英] Is Leaflet a good tool for non-map images?
问题描述
我正在撰写一个网页应用,其中涉及浏览技术插图(平移,缩放,点击) 。我认为 Cloudmade Leaflet 是一个很好的工具,只因为有人用它来制作XKCD 1110 pan / zoomable ,我真的很喜欢它的结果。
<显然,我需要平铺和扩展我原来的技术插图,但是让我们说这是我解决的一个微不足道的问题。然而,看看 Leaflet API ,似乎我必须转换我的技术插图(.ai ,. svg和.png文件)到GeoJSON这样的地理标准。这似乎是一个尴尬的主张。
任何人都可以推荐Leaflet或任何其他工具来导航非地图图像吗?
您可以使用Leaflet执行此操作。 (我自己完成了这个。)
您必须将像素大小转换为latlong(纬度/经度)。 Leaflet通过使用简单
坐标参考系统, map.project
和<为您提供了一种简单的方法。 code> map.unproject 。
首先,像这样构建你的地图:
var map = L.map('map',{
maxZoom:20,
minZoom:20,
crs:L.CRS .Simple
})。setView([0,0],20);
...然后设置地图边界(对于1024x6145的图像):
var southWest = map.unproject([0,6145],map.getMaxZoom());
var northEast = map.unproject([1024,0],map.getMaxZoom());
map.setMaxBounds(new L.LatLngBounds(southWest,northEast));
I am writing a web app that involves navigating technical illustrations (pan, zoom, click). I assume that Cloudmade Leaflet a good tool for this, only because someone used it to make XKCD 1110 pan/zoomable and I really like how it turned out.
Obviously, I would need to tile and scale my original technical illustration, but let's say that's a trivial problem that I have solved. Looking at the Leaflet API, however, it appears I would have to convert my tech illustrations (.ai, .svg, and .png files) to a geographical standard like GeoJSON. That seems like an awkward proposition.
Can anyone recommend Leaflet, or any other tool, for navigating non-map imagery?
You can do this with Leaflet. (I have done exactly this myself.)
You do have to convert your pixel sizes to latlong (latitude/longitude). Leaflet provides you an easy way to do that by using the Simple
"Coordinate Reference System", map.project
and map.unproject
.
First, construct your map like this:
var map = L.map('map', {
maxZoom: 20,
minZoom: 20,
crs: L.CRS.Simple
}).setView([0, 0], 20);
…and then set the map bounds (for an image that is 1024x6145):
var southWest = map.unproject([0, 6145], map.getMaxZoom());
var northEast = map.unproject([1024, 0], map.getMaxZoom());
map.setMaxBounds(new L.LatLngBounds(southWest, northEast));
There's more details regarding splitting your images available here including a Ruby gem which might also be useful.
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