# Convert lambert II to wgs84
**URL:** https://discuss.elastic.co/t/convert-lambert-ii-to-wgs84/104707
**Category:** Logstash
**Created:** [October 20, 2017, 1:33pm UTC](https://discuss.elastic.co/t/convert-lambert-ii-to-wgs84/104707 "2017-10-20T13:33:13Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Ala\_t](https://discuss.elastic.co/u/Ala_t)
#### Post date: [October 20, 2017, 1:33pm UTC](https://discuss.elastic.co/t/convert-lambert-ii-to-wgs84/104707/1 "2017-10-20T13:33:13Z")
Hi,
how can i use ruby code to convert lambertII to wgs84 ?, in fact i installed this library [https://github.com/yageek/lambert-ruby#usage](https://github.com/yageek/lambert-ruby#usage) and I verified that this library is installed because I found it under the folder
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/" and then i tried to use this library with this script ruby in ruby-filter in logstash and this is my ruby-filter in my file.conf:
ruby {
init =\> "require 'lambert\_ruby'"
code =\> "
a = Lambert::LambertPoint.new(994272.661,13467.422)
a.wgs84(Lambert::LambertII)
event.set( '[result]', event.get('[a]') )
"
}
but after restart logstash i get this error "[ERROR][logstash.filters.ruby] Ruby exception occurred: wrong number of arguments calling `initialize` (2 for 3)" , and yet I put this script in a file.rb and it works well but with ruby filter it does not work
i use logstash 5.5.1
I need your help please 🙂
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 17, 2017, 1:33pm UTC](https://discuss.elastic.co/t/convert-lambert-ii-to-wgs84/104707/2 "2017-11-17T13:33:23Z")
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