Gather Geo-Tagged Tweets using Twitter Streaming API | Just change the line 31 to catch tweets from where you want

crawler.sh

#/bin/bash

#Function to Encode
# Thanks to https://gist.github.com/cdown/1163649/8a35c36fdd24b373788a7057ed483a5bcd8cd43e
encode() {
  local _length="${#1}"
  for (( _offset = 0 ; _offset < _length ; _offset++ )); do
    _print_offset="${1:_offset:1}"
    case "${_print_offset}" in
      [a-zA-Z0-9.~_-]) printf "${_print_offset}" ;;
      ' ') printf + ;;
      *) printf '%%%X' "'${_print_offset}" ;;
    esac
  done
}

./twitter-config.sh

# Consumer Key
key=$consumer_key
# Consumer Secret
secret=$consumer_secret
# Access Token
token=$access_token
# Access Token Secret
token_secret=$access_secret

method='POST'
url='https://stream.twitter.com/1.1/statuses/filter.json'
# San Francisco
data='locations=-122.75%2C36.8%2C-121.75%2C37.8'
# Big Curitiba Area
#data='locations=-49.591599%2C-25.646478%2C-48.961945%2C-25.281954'

#encoded for Signature
encoded_url=$(encode $url)
encoded_data=$(encode $data)

nonce=`date +%s%T%N | openssl base64 | sed -e s'/[+=/]//g' | head -c 32`

timestamp=`date +%s`

signature=`echo -n $method'&'$encoded_url'&'$encoded_data'%26oauth_consumer_key%3D'$key'%26oauth_nonce%3D'$nonce'%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D'$timestamp'%26oauth_token%3D'$token'%26oauth_version%3D1.0' | openssl dgst -sha1 -hmac $secret'&'$token_secret -binary | openssl base64 | sed -e s'/+/%2B/' -e s'/\//%2F/' -e s'/=/%3D/'`

curl $url --data $data --header 'Authorization: OAuth oauth_consumer_key="'$key'", oauth_nonce="'$nonce'", oauth_signature="'$signature'", oauth_signature_method="HMAC-SHA1", oauth_timestamp="'$timestamp'", oauth_token="'$token'", oauth_version="1.0"' --verbose