获得LAT / LONG坐标范围内的国家/地区 [英] Get countries within range of LAT/LONG coordinates

问题描述

我正在寻找一种方法来查找给定LAT / LONG坐标范围内的国家/地区。

例如：

使用Google地图查看非洲地区时，可以查看当前视图中的哪些国家/地区。

这有点雄心勃勃，我认为主要问题将是处理所需多边形的准确性。这些准确性不一定非常好，边界可能会达到几十英里，甚至更远。

这将是整个项目所需要的

noreferrer> QGIS 基于假设你有

1. 非洲的一个GIS层（如果你不能找到一个 google


2. 基于Lat long的点图层（或者您可以使用Qgis的文本使用ftools - 或 - Vector菜单，有一个称为多边形中的点的功能，可以解决您的问题。
使用ftools-或 -
$ b >


Trouble!

I'm looking for a way to find the countries within a given range of LAT/LONG coordinates.

E.g.:

When viewing an area in Africa using Google Maps, I get out which countries that are in my current view.

This is a bit ambitious, and I think the main problem will be dealing with accuracy of the needed polygons. The accuracy of these don't need to be all that great, the borders can probably be tens of miles off, or even more.

This will be needed for the entire world.

解决方案

You can solve this easily using QGIS based on the assumption that you have

1. A GIS layer of Africa (if not you can find one using google
2. A point layer based on Lat long (or you can use Qgis's text delimited import)

using ftools -or- Vector menu, there is a feature called points in polygons that should solve your problem

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