【南投信義】丹大林道與消失的省道台16線|可徒步深入中央山脈的經典長程林道

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布農族人有這麼一句話:「濁水溪的上游,不是終點,是我們布農文化的起源」,這句話揭開 丹大林道 的旅行序幕。下面是幾年前,丹大林道還沒被媒體大肆報導前,我曾在某個冬季前往安靜的丹大林道徒步健行和野營,以及在工寮過夜的三天兩夜重裝健行紀錄。 2024.01.31更新:合流坪的鋼便橋已於今日被台電撤除了 連結: 台電施工後丹大林道「恢復」通行! 拆橋挖巨溝「車輛恐無法通過」 丹大地區 位於臺灣本島中部之濁水溪上游,行政區隸屬於南投縣信義鄉,為全國面積第二大的鄉鎮。丹大地區也是濁水溪的發源處。東側翻過中央山脈可達花蓮,南鄰玉山國家公園,西接日月潭國家風景區,北側則與仁愛鄉相接。 潭南、雙龍、地利及人和四村等區域皆位於信義鄉,著名的 丹大(孫海)林道 便位於地利村中,沿著步道往東至花蓮邊界處可與七彩湖相接。其中地利村及雙龍村面積最大,合佔本區約七成面積,人和村次之,面積最小者為潭南村 。 丹大林道周邊地圖 丹大林道路徑示意圖 日治時期西元1943年,原本預計將東部花蓮木瓜溪流域附近的水力發電廠所生產的剩餘電力運輸到西部,但因為日本在1945年戰敗後,計畫就宣告中止,1948年台灣工業急速發展,用電量大增,直到1950年獲得美國援助執行了能高路線全長45公里的69kV東西向輸電計畫。 之後為了解決花東地區電力供應問題,台電於1985年開始研究新東西輸電之路線,最後決定自南投明潭發電廠與大觀第二發電廠輸送電力至花蓮鳳林超高壓變電所,此新東西輸電線於1990年開始辦理路線中心測量,1998年完工,全長72.4公里。 沿線共有196座電塔,線路橫跨中央山脈海拔2925公尺的崇山峻嶺,並在「 七彩湖 」附近的越嶺處設有「 光華復旦 」紀念碑,西以 丹大林道 、東以 萬榮林道 為維修保線道路。 丹大林道是深入丹大地區的重要通道,1958年(民國47年),出生於現今雲林縣口湖鄉的孫海,標得林務局巒丹大事業區第八林班地檜木原始林採伐權及伐木後的重新造林權,為了進入深林,孫海沿著原本的山徑開闢出可以卡車通行的丹大林道,因此丹大林道也被稱為「 孫海林道 」。 當年為了闢築林道與運輸需要,孫海建造了一座木橋於合流坪橫跨濁水溪,之後改為水泥橋,這座橋就是著名的「 孫海橋 」。 為了伐木業而開闢的丹大林道,其終點一開始並不是在七彩湖,後半段到光華復旦碑約12公里路段,是台電為了興建東西線輸電工程,才於

Connect to the Foursquare API via OAuth in your Rails application

OAuth is an open authentication protocol that allows secure API communication without the necessity of continually passing a username and password with each request. The idea for OAuth was conceived in 2006 by a group of individuals working on the Twitter implementation of OpenID. 

After reviewing both OpenID and other existing industry practices, such as Amazon Web Services API and Flickr API, it was decided that a proposal should be written for a new open protocol for application authentication.

OAuth has been widely adopted among major web services. Twitter, not only implementing OAuth as its primary API authentication method, but using it as the basis for its “Sign in with Twitter” service. Today, you’ll also find the protocol used by Facebook, Google, Yahoo, LinkedIn, and many others.

Foursquare is a new and rapidly growing social utility whose potential for mash-ups with other applications is limited only by one’s own imagination. The Foursquare platform implements the OAuth 2.0 standard, so users can authorize applications to access Foursquare resources on their behalf without revealing their passwords or other credentials to those applications. The foursquare API gives you access to all of the data used by the foursquare mobile applications, and, in some cases, even more.



I have been experimenting with the Foursquare API for a few days now, and I wanted to show you how you can implement use Foursquare in your Rails application using OAuth 2.0 (This is a very simple Rails application that connects to the Foursquare API using Quimby [http://github.com/groupme/quimby]). It is working fine as I'm using Rails 2.3.8 on ruby 1.8.7 and it also work with Rails 3!

I'm going to just give you the concept for this post. If you have no prior experience with Ruby or you are new to Rails, as you read this post, don't get use these code directly, it will not work for your blank Rails application.

Below is a general overview for an OAuth connection: 
1.Send request to target website for token, with the server's client_id & secret_id 
2.Redirect user to authorize page with token (and callback url)
3.After user confirm, user will be redirect to the callback page with a access_token
4.Save the access_token, and free to call target server for user data.


You will need a Foursquare account to obtain your key and secret in the first place. Visit https://foursquare.com/oauth to register your Rails application and obtaining your API credentials, where you need to provide an app name (ex: Railscode), a website url (ex: http://localhost:3000) and a callback URL (ex: http://localhost:3000/fsq_callback).  It’s a free signup, and if you wish to work on the API I’m sure you’ve already had an interest in the application! After registration, you should see something like this:



Copy your Foursquare App Client ID & Client Secret and paste it into your environment.rb or maybe config_foursquare.yml. The callback URL is the location your users will be sent after they authenticate on Foursquare’s site.

Next run rails script to generate a migration file:
$ script/generate migration add_foursquare_to_users



And we have to install the following ruby gems:



We need to be able to intercept this redirect, capture the token, and store it so we can begin interacting with Foursquare. Add the following method to the application controller:



Next we need to write a callback method in the fsq_oauth_controller.rb. Once we’ve retrieved the code from the Foursquare server, we can exchange it for an access token.



Add the following line in the routes.rb:



In order to retrieve an access token, we need to redirect the user to the Foursquare authorization URL (More info can be found on https://developer.foursquare.com/docs/oauth.html). we can add the foursquare connect button in the view page:



When pressing the login button, you can login with your Foursquare credentials!


Now that the app has an access token, we can launch our main activity and start interacting with Foursquare.

This has been a basic look into getting started with Foursquare’s API. OAuth is a very powerful open protocol for connecting into larger social communities. It offers the most secure solutions for both users and web masters. The Foursquare Developers center is an amazing tool for newbies.Scour the resources and look up and function calls you may be interested in working with. Similarly the official OAuth website has some terrific readings outlining the purpose and practical solutions for the protocol.

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