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在哪里可以找到在墨卡托投影中绘制美国所需的坐标?

mercator map-projections proj4js gis

Eli Courtwright · 技术社区 · 14 年前

所以我正在编写一个javascript库,它获取x,y坐标,并用它们绘制一张我们的地图。为此,我需要找到绘制每个状态所需的坐标数据。维基百科上的这张地图是我需要的一个很好的例子,因为SVG文件包含了组成每个州的形状,这些形状被贴有很好的标签: http://upload.wikimedia.org/wikipedia/commons/3/32/Blank_US_Map.svg

我还需要在地图上放置一组站点。因为我知道每个站点的纬度和经度,所以我可以用它在地图上的适当位置绘制每个站点。不幸的是,为了使这项工作,我的地图需要使用墨卡托投影,以便有一个简单的平面,长到X,Y像素坐标的映射。

我上面提到的维基百科地图使用了其他投影,所以我不能将它用于此目的。有人知道在墨卡托投影中我在哪里可以找到这种类型的地图数据吗?任何数据格式都是好的,只要我能以编程的方式获得用于绘制每个状态的坐标,并确定组成每个状态的形状。

9 回复 | 直到 14 年前

A. Rex 14 年前

Kevin McCurley maps all 50 states

dassouki 14 年前

openlayers Google maps API mapserver

<Placemark>
      <name>American Samoa</name>
      <styleUrl>#PolyStyle00</styleUrl>
      <Snippet></Snippet>
      <MultiGeometry>
        <Polygon>
          <tessellate>1</tessellate>
          <extrude>0</extrude>
          <altitudeMode>clampToGround</altitudeMode>
          <outerBoundaryIs><LinearRing><coordinates> -0.001536,-0.000099,0.000000 -0.001536,-0.000099,0.000000 -0.001536,-0.000100,0.000000 -0.001536,-0.000100,0.000000 -0.001536,-0.000100,0.000000 -0.001536,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000100,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001537,-0.000099,0.000000 -0.001536,-0.000099,0.000000 -0.001536,-0.000099,0.000000 -0.001536,-0.000099,0.000000 -0.001536,-0.000099,0.000000 -0.001536,-0.000099,0.000000 -0.001536,-0.000099,0.000000 -0.001536,-0.000099,0.000000 -0.001536,-0.000099,0.000000</coordinates>
            </LinearRing>
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        </Polygon>