The document discusses the use of APIs, particularly Google Maps and Twitter, to track and analyze social media sentiments and trends. It outlines methods for retrieving and displaying geolocated tweets and the implementation of sentiment analysis. Additionally, it emphasizes considerations regarding API usage limits and the reliability of sentiment data.

1. www.autentia.com
GeoSentimentZ
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2. www.autentia.com
Who’s that guy
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Want to track something?
Probably people is talking
about it on the Web and
social media
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Are you trendy?
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Are you trendy?
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New ways to measure
TPS: Tweets Per Second
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New ways to measure
TPS: Tweets Per Second
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New ways to measure
TPS: Tweets Per Second
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New ways to measure
TPS: Tweets Per Second
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How influential are you?
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New tools to measure
Built on APIs to get data
Built on APIs to represent data
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The Building blocks:
The APIs
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Google Maps API
Well known interface
Gives different layers
- Map
- Terrain
- Satellite
Place Points Of Interest
Group POIs
POI metadata
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14. www.autentia.com
Google Maps API use
<script
src="http://maps.google.com/maps/api/js?sensor=false"></script>
var
map;
function
initialize()
{
var
center
=
new
google.maps.LatLng(50,
20);
map
=
new
google.maps.Map(document.getElementById('map'),
{
zoom:
3,
center:
center,
mapTypeId:
google.maps.MapTypeId.ROADMAP
});
}
google.maps.event.addDomListener(window,
'load',
initialize);
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15. www.autentia.com
Google Maps API use
<script
src="http://maps.google.com/maps/api/js?sensor=false"></script>
var
map;
function
initialize()
{
var
center
=
new
google.maps.LatLng(50,
20);
map
=
new
google.maps.Map(document.getElementById('map'),
{
zoom:
3,
center:
center,
mapTypeId:
google.maps.MapTypeId.ROADMAP
});
}
google.maps.event.addDomListener(window,
'load',
initialize);
<div id="map-container">
<div id="map"></div>
</div>
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16. www.autentia.com
Google Maps API use
function
callEvents(){
var
searchQuery
=
$('#searchQuery').value;
$.ajax({
url:
'/sentimentz/pois/'
+
encodeURIComponent(searchQuery),
type:
'GET',
contentType:
'application/json',
success:
function(data){
setTimeout(function(){
putEvents(data)},
500);
},
error:
function(data,
status,
er){
//....
}
});
}
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17. www.autentia.com
Google Maps API use
function
callEvents(){
var
searchQuery
=
$('#searchQuery').value;
$.ajax({
url:
'/sentimentz/pois/'
+
encodeURIComponent(searchQuery),
type:
'GET',
contentType:
'application/json',
success:
function(data){
setTimeout(function(){
putEvents(data)},
500);
},
error:
function(data,
status,
er){
//....
}
});
}
[
{
"rate":0,
"msg":"Muy
buena
exposición
sobre
API
business
model
#APIDays",
"location":{
"latitude":40.44614387,
"longitude":-­‐3.67365923
},
"id":340414678016593920,
"createAt":1369996158000
}
]
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18. www.autentia.com
Google Maps API use
function
putEvents(events){
var
bounds
=
new
google.maps.LatLngBounds();
var
markers
=
[];
document.getElementById("totalGeoTweets").innerHTML
=
events.length;
for
(var
i
=
0;
i
<
events.length;
i++)
{
var
event
=
events[i];
var
latLng
=
new
google.maps.LatLng(event.location.latitude,
event.location.longitude);
bounds.extend(latLng);
var
marker
=
new
google.maps.Marker({
position:
latLng,
map:
map,
});
markers.push(marker);
}
map.fitBounds(bounds);
var
markerCluster
=
new
MarkerClusterer(map,
markers);
}
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19. www.autentia.com
The Source: twitter
An open window to shout your
thougths...
... that everyone can listen
#hashtags
@users
queryStrings
Geolocalized
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Info contained in a tweet
http://www.geekosystem.com/tweet-diagram/
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Twitter: The search API
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Twitter: The search API
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-core</artifactId>
<version>3.0.3</version>
</dependency>
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23. www.autentia.com
Twitter: The search API
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-core</artifactId>
<version>3.0.3</version>
</dependency>
public
List<Event>
retrieveAllTweetsByQuery(String
hashtag)
throws
TwitterException,
MalformedURLException
{
Twitter
twitter
=
TwitterFactory.getInstance();
Query
query
=
new
Query(hashtag);
QueryResult
result;
List<Status>
tweets
=
new
ArrayList<Status>();
do
{
result
=
twitter.search(query);
tweets.addAll(result.getTweets());
}
while
((query
=
result.nextQuery())
!=
null);
}
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24. www.autentia.com
Twitter: The search API
public
List<Event>
retrieveAllTweetsByQuery(String
hashtag)
throws
TwitterException,
MalformedURLException
{
Twitter
twitter
=
getTwitterAccessor();
Query
query
=
new
Query(hashtag);
QueryResult
result;
List<Status>
tweets
=
new
ArrayList<Status>();
do
{
result
=
twitter.search(query);
tweets.addAll(result.getTweets());
}
while
((query
=
result.nextQuery())
!=
null);
}
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What others have done
World Cup TrendsMap
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What others have done
Magnitude Calculator
http://hitching.net/magnitwude/
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What others have done
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The missing piece
Adding sentimental analysis
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The missing piece
Adding sentimental analysis
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30. www.autentia.com
The missing piece
@Value
("https://store.apicultur.com/api/stmtlk/1.0.0/valoracion/tweet/10")
private
String
serviceUrl
=
null;
private
RestTemplate
restTemplate;
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
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31. www.autentia.com
The missing piece
public
Sentiment
rate(Tweet
tweet)
{
logger.debug("Rating
sentimentally
tweet
"
+
tweet.getText());
Sentiment
sentiment;
try
{
sentiment
=
restTemplate.postForObject(serviceUrl,
tweet,
Sentiment.class);
}
catch
(Exception
ex)
{
logger.error("Could
not
rate
"
+
tweet
+
"
Error:
"
+
ex.getMessage(),
ex);
return
Sentiment.UNRATED;
}
logger.debug("Tweet
rated
sentimentally
as
:
"
+
sentiment);
return
sentiment;
}
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32. www.autentia.com
The missing piece
public
class
Sentiment
{
private
static
final
int
LEVEL_UNKNOWN
=
0;
public
static
final
Sentiment
UNRATED
=
new
Sentiment(LEVEL_UNKNOWN,
LEVEL_UNKNOWN,
"NEUTRO");
@JsonProperty("intensidad")
private
int
intensity
=
0;
@JsonProperty("certidumbre")
private
int
certainty
=
0;
@JsonProperty("ponderacion")
private
String
sentiment;
}
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33. www.autentia.com
The missing piece
public
class
Sentiment
{
private
static
final
int
LEVEL_UNKNOWN
=
0;
public
static
final
Sentiment
UNRATED
=
new
Sentiment(LEVEL_UNKNOWN,
LEVEL_UNKNOWN,
"NEUTRO");
@JsonProperty("intensidad")
private
int
intensity
=
0;
@JsonProperty("certidumbre")
private
int
certainty
=
0;
@JsonProperty("ponderacion")
private
String
sentiment;
}
{
"intensidad":
4,
"certidumbre":
4,
"ponderacion":
"POSITIVA",
"texto":
"wso2
api
manager
interesante
gestionar
apis
uso
http//kcyme/lqie
apidays"
}
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34. www.autentia.com
Putting all the blocks
toghether:
GeoSentimentZ
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35. www.autentia.com
GeoSentimentz
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Some final considerations
Be careful with API invocation pace
(Some APIs have limits/prices)
Use Queues/Schedulers to calm API
calls traffic
Some Sentiment could not be reliable
Intruder tweets
Not spanish
Slang, arbbr, typos
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37. www.autentia.com
“Somos pocos, somos buenos, estamos
motivados y nos gusta lo que hacemos”
Thanks for listening
@dgomezg
@autentia
domingo 2 de junio de 13