在 d3 中获取边界框/可见地图图块的范围
Get bounding box / extent of visible map tiles in d3
假设我有一个这样的标准平铺地图：http://bl.ocks.org/mbostock/4132797
如何获取可见地图的边界框坐标？
换句话说，我怎么能准确地说出在任何给定时间显示的地图范围。我将其理解为边界框，但也理解为范围。
谢谢。
我能够找到类似但具体问题的答案，但我将其保留以防有人搜索一般情况。
来自以利亚·米克斯的 answer:
To find the bounding box of the visual area of your map on screen,
simply use the projection.invert() function and feed it the top-left
and bottom-right corners of your SVG. If you have a 500x500 SVG, then
that looks like this:
projection.invert([0,0]) projection.invert([500,500]) This is a
bounding box of your screen, in lat-long (or whatever coordinate
system you're using).
After that, you can get the bounds of your features and test to see if
they are fully-contained or intersecting or have their centroid within
those bounds. I'm not going to explain how to do that here, because
that's a different question with many different answers depending on
which definition of "within these bounds" you decide on.
因此，将可见区域的width和height插入到投影生成器中。瞧，你有盒子。
假设我有一个这样的标准平铺地图：http://bl.ocks.org/mbostock/4132797
如何获取可见地图的边界框坐标？
换句话说，我怎么能准确地说出在任何给定时间显示的地图范围。我将其理解为边界框，但也理解为范围。
谢谢。
我能够找到类似但具体问题的答案，但我将其保留以防有人搜索一般情况。
来自以利亚·米克斯的 answer:
To find the bounding box of the visual area of your map on screen, simply use the
projection.invert()function and feed it the top-left and bottom-right corners of your SVG. If you have a 500x500 SVG, then that looks like this:
projection.invert([0,0])projection.invert([500,500])This is a bounding box of your screen, in lat-long (or whatever coordinate system you're using).After that, you can get the bounds of your features and test to see if they are fully-contained or intersecting or have their centroid within those bounds. I'm not going to explain how to do that here, because that's a different question with many different answers depending on which definition of "within these bounds" you decide on.
因此，将可见区域的width和height插入到投影生成器中。瞧，你有盒子。