Windows下在Ruby上的RGeo:如何启用GEOS支持? [英] RGeo on Ruby under Windows: How to enable GEOS support?

问题描述

我正在尝试使用RGeo gem在Ruby中进行一些空间操作.不幸的是，很多操作都需要GEOS库，而且我找不到任何文档说明如何在Windows中集成它(我使用的是Windows 7 64bit).

I'm trying to do some spatial operations in Ruby with the RGeo gem. Unfortunately, a lot of operations require the GEOS library and I can't find any documentation showing how to integrate this in Windows (I am using Windows 7 64bit).

我尝试从 http://trac.osgeo.org/下载并安装GEOS的Windows二进制文件. osgeo4w/并通过gem install rgeo -- --with-geos-dir="C:\OSGeo4W64\bin重新安装RGeo gem(<<在此目录中有一个文件geos_c.dll).

I tried downloading and installing the Windows binaries of GEOS from http://trac.osgeo.org/osgeo4w/ and reinstalling the RGeo gem via gem install rgeo -- --with-geos-dir="C:\OSGeo4W64\bin (<< in this directory there is a file geos_c.dll).

仍然使用RGeo::Geos.supported?返回false.

有人知道如何解决这个问题吗?

Does anybody know how to solve this?

推荐答案

对于其他想要这样做的人-这里有一些有关如何使其工作的提示.

For anyone else looking to do this - here are some tips as to how I got it working.

通过点击 http://trac.osgeo.org/geos/中的链接，
• 安装GEOS Windows二进制文件a>(我有Ruby 32位版本，所以我选择了32位版本)
• 您现在应该可以在C:\OSGeo4W\bin
中找到文件geos_c.dll.
• 将Windows环境变量ENV['GEOS_LIBRARY_PATH']设置为C:\OSGeo4W\bin
• 此时检查以确保ENV变量存在-也许重新启动PC！
• 在您的Gem文件中，添加gem 'ffi-geos'和gem 'rgeo'并捆绑安装
• 在您的Ruby文件中，请记住依次按require 'ffi-geos'和require 'rgeo'
• 使用factory = RGeo::Geos.factory(:native_interface => :ffi)-不 RGeo::Cartesian.factory
• 按照Dirk的说法检查RGeo::Geos.supported?

• install GEOS Windows binaries by following the link from http://trac.osgeo.org/geos/ (I have Ruby 32 bit version, so I went for the 32 bit version)
• you should now be able to find a file geos_c.dll in C:\OSGeo4W\bin
• set a Windows environment variable ENV['GEOS_LIBRARY_PATH'] to be C:\OSGeo4W\bin
• check at this point to make sure that ENV variable is there - maybe restart your PC!
• in your Gemfile, add gem 'ffi-geos' and gem 'rgeo' and bundle install
• in your Ruby file, remember to require 'ffi-geos' and require 'rgeo' (in that order)
• use factory = RGeo::Geos.factory(:native_interface => :ffi) - not RGeo::Cartesian.factory
• check RGeo::Geos.supported? as Dirk said

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