2008 老虎/线®来自 Census.gov 的 Shapefile ->谷歌地图
如何获取 shapefile 并提取纬度/经度坐标，以便可以在 Google 地图上绘制多边形？
http://www2.census.gov/cgi-bin/shapefiles/national-files
我在这里问了这个问题：
http://groups .google.com/group/Google-Maps-API/browse_thread/thread/18763b4b0cb996c7
他们告诉我该做什么，但没有告诉我怎么做=P
谢谢！
How do I take shapefiles and extract lat/lng coords so I can plot polygons on Google Maps?
http://www2.census.gov/cgi-bin/shapefiles/national-files
I asked this question here:
http://groups.google.com/group/Google-Maps-API/browse_thread/thread/18763b4b0cb996c7
and they told me WHAT to do, but not HOW to do it =P
Thx!
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这取决于您需要如何实现这一目标。如果您只需要一些形状，您可以自己在这些文件中查找坐标。您可以使用这些坐标在 Google 地图中创建 GPolygon。
如果您需要大量形状 - 您需要以编程方式完成。我建议使用您最喜欢的语言来解析 XML 文件并检索每个形状的坐标。
It depends on how you need to accomplish this. If you just need a few shapes, you can look up the coordinates in those files yourself. You can use those coordinates to create a GPolygon in Google Maps.
If you need lots of shapes - you'll need to do it programmatically. I would suggest using your favorite language to parse the XML file and retrieve the coordinates for each shape.
去年，当我开发屏幕保护程序来呈现总统投票数据时，我遇到了类似的问题。我真的不想花时间解析人口普查网站上的 Shapefiles 数据（规范是 这里（如果您错过了）。
不确定我是否真的在这里节省了时间，但我最终编写了一个 python 应用程序来在屏幕上渲染 50 个状态，跟踪边缘，然后以简单的文本格式存储数据。不确定我的数据对于您的应用程序来说是否足够高分辨率，但您可以在此处获取我生成的数据：
http ://www.cannonade.net/pnt.zip
注意我生成的数据不是纬度/经度，但通过一些缩放，您应该能够翻译它们。
祝你好运。
I had a similar problem last year when I was developing a screensaver to render presidential polling data. I didn't really want to invest the time to parse the Shapefiles data on the census site (The spec is here if you missed it).
Not sure if I actually saved any time here, but I ended writing a python app to render the 50 states onscreen, trace the edges and then store the data in a simple text format. Not sure if my data is high res enough for your application, but you can grab the data I generated here:
http://www.cannonade.net/pnt.zip
N.B. The data I generate are not latitude/longitudes, but with some scaling you should be able to translate them.
Good luck.
我在 http://www.census.gov 上使用 ARC 文件时运气更好/geo/www/cob/index.html
我现在找不到该网页，但我确实找到了一个有实际代码的网页。谷歌搜索“arc to kml”之类的东西，然后从那里开始。
I had better luck using the ARC files at http://www.census.gov/geo/www/cob/index.html
I can't find the webpage right now, but I did find one that had actual code. Google something like "arc to kml" and go from there.