public override bool Equals(object obj)
{
if (!(obj is Geotag))
{
return(false);
}
Geotag other = (Geotag)obj;
return(other.Longitude == Longitude && other.Latitude == Latitude);
}
public static double Distance(Geotag g1, Geotag g2)
{
return Math.Sqrt(Math.Pow(g1.Latitude - g2.Latitude, 2) + Math.Pow(g1.Longitude - g2.Longitude, 2));
}
static StoryTagCollection OCGetTags(Story story)
{
StoryTagCollection tagCollection = new StoryTagCollection();
try
{
Uri address = new Uri("http://api.opencalais.com/tag/rs/enrich");
//Create the web request
HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;
//Set type to POST
request.Method = "POST";
request.ContentType = "text/raw";
request.Accept = "Application/Json";
request.Timeout = 15000;
//Set headers
request.Headers.Add("x-calais-licenseID", "jb47yzz6jsqkhkbsqc3urfs7");
//Append text as byte array
StringBuilder data = new StringBuilder();
data.Append(story.Text);
byte[] byteData = UTF8Encoding.UTF8.GetBytes(data.ToString());
//Set the content length in the request headers
request.ContentLength = byteData.Length;
//Write data
using (Stream postStream = request.GetRequestStream())
{
postStream.Write(byteData, 0, byteData.Length);
}
//Get response
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
// Get the response stream
StreamReader reader = new StreamReader(response.GetResponseStream());
string resultString = reader.ReadToEnd();
//Extract all geotags that have lat-lon coordinates
Hashtable result = JSON.JsonDecode(resultString) as Hashtable;
List<Geotag> allGeotags = new List<Geotag>();
foreach (Hashtable item in result.Values)
{
if (item.ContainsKey("resolutions")) //This is a geotag
{
Hashtable resolutions = (Hashtable)((ArrayList)item["resolutions"])[0];
if (!resolutions.ContainsKey("latitude"))
continue;
string parentCountry = "";
if (resolutions.ContainsKey("containedbycountry"))
parentCountry = resolutions["containedbycountry"].ToString();
allGeotags.Add(new Geotag()
{
Name = item["name"].ToString(),
ParentCountry = parentCountry,
Type = item["_type"].ToString(),
Latitude = double.Parse(resolutions["latitude"].ToString(), CultureInfo.InvariantCulture),
Longitude = double.Parse(resolutions["longitude"].ToString(), CultureInfo.InvariantCulture),
Count = ((ArrayList)item["instances"]).Count
}
);
}
else if (item.ContainsKey("_type") && _OCInterestingEventTypes.Contains((string)item["_type"]))
{
foreach (DictionaryEntry field in item)
{
if (_OCKeywordFields.Contains(field.Key) && !((string)field.Value).Contains("http"))
tagCollection.Keywords.Add((string)field.Value);
if (_OCEntityFields.Contains(field.Key) && !((string)field.Value).Contains("http"))
tagCollection.Entities.Add((string)field.Value);
}
}
if (item.ContainsKey("_typeGroup") && item["_typeGroup"].ToString() == "topics")
tagCollection.Keywords.Add((string)item["categoryName"]);
}
//Pick geotags to use
if (allGeotags.Count > 0 || story.TwitterGeotags.Count > 0)
{
//Calculate a weighted average location based on OC tags and Twitter geotags, then take the nearest tag and use it as the story location
double lonSum = 0;
double latSum = 0;
double weightSum = 0;
foreach (Geotag g in allGeotags.Distinct())
{
double weight = 0;
if (g.Type == "Country")
weight = 2;
else if (g.Type == "ProvinceOrState")
weight = 3;
else //if (g.Type == "City")
weight = 4;
lonSum += weight * g.Longitude;
latSum += weight * g.Latitude;
weightSum += weight;
}
foreach (Geotag g in story.TwitterGeotags.Distinct())
{
double weight = 5;
lonSum += weight * g.Longitude;
latSum += weight * g.Latitude;
weightSum += weight;
}
Geotag meanLoc = new Geotag() { Latitude = latSum / weightSum, Longitude = lonSum / weightSum };
Geotag nearestTag = allGeotags.Union(story.TwitterGeotags).OrderBy(n => Geotag.Distance(n, meanLoc)).First();
Console.WriteLine("OC: " + allGeotags.Count + ", Twitter: " + story.TwitterGeotags.Count);
tagCollection.Geotags.Add(nearestTag);
}
//List<Geotag> geotags = new List<Geotag>();
//if (allGeotags.Count > 0)
//{
// //1) Cities for which the parent country is also mentioned, exept all caps cities (e.g. "LONDON (AP)")
// geotags.AddRange(allGeotags.Where(n => n.Type == "City" && n.ParentCountry == "" || allGeotags.Any(m => m.Name == n.ParentCountry)));
// //2) else: Top city if no country was mentioned
// if (geotags.Count == 0 && allGeotags.Any(n => n.Type == "City") && !allGeotags.Any(n => n.Type == "Country"))
// geotags.Add(allGeotags.Where(n => n.Type == "City").OrderByDescending(n => n.Count).First());
// //3) else: All countries
// if (geotags.Count == 0 && allGeotags.Any(n => n.Type == "Country"))
// geotags.AddRange(allGeotags.Where(n => n.Type == "Country"));
//}
//if (story.TwitterGeotags.Count > 0)
//{
// double meanLon = story.TwitterGeotags.Average(n => n.Longitude);
// double meanLat = story.TwitterGeotags.Average(n => n.Latitude);
// geotags.Add(new Geotag() { Longitude = meanLon, Latitude = meanLat });
//}
//tagCollection.Geotags.AddRange(geotags);
}
}
catch (Exception e)
{
if (e is WebException && (e.Message.Contains("Timeout") || e.Message.Contains("timed out")))
Console.WriteLine("Timeout");
else if (e is WebException && e.Message.Contains("Internal Server Error"))
Console.WriteLine("Internal Server Error");
else
CrisisTracker.Common.Output.Print(Name, e);
}
return tagCollection;
}
static StoryTagCollection OCGetTags(Story story)
{
StoryTagCollection tagCollection = new StoryTagCollection();
try
{
Uri address = new Uri("http://api.opencalais.com/tag/rs/enrich");
//Create the web request
HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;
//Set type to POST
request.Method = "POST";
request.ContentType = "text/raw";
request.Accept = "Application/Json";
request.Timeout = 15000;
//Set headers
request.Headers.Add("x-calais-licenseID", "jb47yzz6jsqkhkbsqc3urfs7");
//Append text as byte array
StringBuilder data = new StringBuilder();
data.Append(story.Text);
byte[] byteData = UTF8Encoding.UTF8.GetBytes(data.ToString());
//Set the content length in the request headers
request.ContentLength = byteData.Length;
//Write data
using (Stream postStream = request.GetRequestStream())
{
postStream.Write(byteData, 0, byteData.Length);
}
//Get response
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
// Get the response stream
StreamReader reader = new StreamReader(response.GetResponseStream());
string resultString = reader.ReadToEnd();
//Extract all geotags that have lat-lon coordinates
Hashtable result = JSON.JsonDecode(resultString) as Hashtable;
List <Geotag> allGeotags = new List <Geotag>();
foreach (Hashtable item in result.Values)
{
if (item.ContainsKey("resolutions")) //This is a geotag
{
Hashtable resolutions = (Hashtable)((ArrayList)item["resolutions"])[0];
if (!resolutions.ContainsKey("latitude"))
{
continue;
}
string parentCountry = "";
if (resolutions.ContainsKey("containedbycountry"))
{
parentCountry = resolutions["containedbycountry"].ToString();
}
allGeotags.Add(new Geotag()
{
Name = item["name"].ToString(),
ParentCountry = parentCountry,
Type = item["_type"].ToString(),
Latitude = double.Parse(resolutions["latitude"].ToString(), CultureInfo.InvariantCulture),
Longitude = double.Parse(resolutions["longitude"].ToString(), CultureInfo.InvariantCulture),
Count = ((ArrayList)item["instances"]).Count
}
);
}
else if (item.ContainsKey("_type") && _OCInterestingEventTypes.Contains((string)item["_type"]))
{
foreach (DictionaryEntry field in item)
{
if (_OCKeywordFields.Contains(field.Key) && !((string)field.Value).Contains("http"))
{
tagCollection.Keywords.Add((string)field.Value);
}
if (_OCEntityFields.Contains(field.Key) && !((string)field.Value).Contains("http"))
{
tagCollection.Entities.Add((string)field.Value);
}
}
}
if (item.ContainsKey("_typeGroup") && item["_typeGroup"].ToString() == "topics")
{
tagCollection.Keywords.Add((string)item["categoryName"]);
}
}
//Pick geotags to use
if (allGeotags.Count > 0 || story.TwitterGeotags.Count > 0)
{
//Calculate a weighted average location based on OC tags and Twitter geotags, then take the nearest tag and use it as the story location
double lonSum = 0;
double latSum = 0;
double weightSum = 0;
foreach (Geotag g in allGeotags.Distinct())
{
double weight = 0;
if (g.Type == "Country")
{
weight = 2;
}
else if (g.Type == "ProvinceOrState")
{
weight = 3;
}
else //if (g.Type == "City")
{
weight = 4;
}
lonSum += weight * g.Longitude;
latSum += weight * g.Latitude;
weightSum += weight;
}
foreach (Geotag g in story.TwitterGeotags.Distinct())
{
double weight = 5;
lonSum += weight * g.Longitude;
latSum += weight * g.Latitude;
weightSum += weight;
}
Geotag meanLoc = new Geotag()
{
Latitude = latSum / weightSum, Longitude = lonSum / weightSum
};
Geotag nearestTag = allGeotags.Union(story.TwitterGeotags).OrderBy(n => Geotag.Distance(n, meanLoc)).First();
Console.WriteLine("OC: " + allGeotags.Count + ", Twitter: " + story.TwitterGeotags.Count);
tagCollection.Geotags.Add(nearestTag);
}
//List<Geotag> geotags = new List<Geotag>();
//if (allGeotags.Count > 0)
//{
// //1) Cities for which the parent country is also mentioned, exept all caps cities (e.g. "LONDON (AP)")
// geotags.AddRange(allGeotags.Where(n => n.Type == "City" && n.ParentCountry == "" || allGeotags.Any(m => m.Name == n.ParentCountry)));
// //2) else: Top city if no country was mentioned
// if (geotags.Count == 0 && allGeotags.Any(n => n.Type == "City") && !allGeotags.Any(n => n.Type == "Country"))
// geotags.Add(allGeotags.Where(n => n.Type == "City").OrderByDescending(n => n.Count).First());
// //3) else: All countries
// if (geotags.Count == 0 && allGeotags.Any(n => n.Type == "Country"))
// geotags.AddRange(allGeotags.Where(n => n.Type == "Country"));
//}
//if (story.TwitterGeotags.Count > 0)
//{
// double meanLon = story.TwitterGeotags.Average(n => n.Longitude);
// double meanLat = story.TwitterGeotags.Average(n => n.Latitude);
// geotags.Add(new Geotag() { Longitude = meanLon, Latitude = meanLat });
//}
//tagCollection.Geotags.AddRange(geotags);
}
}
catch (Exception e)
{
if (e is WebException && (e.Message.Contains("Timeout") || e.Message.Contains("timed out")))
{
Console.WriteLine("Timeout");
}
else if (e is WebException && e.Message.Contains("Internal Server Error"))
{
Console.WriteLine("Internal Server Error");
}
else
{
CrisisTracker.Common.Output.Print(Name, e);
}
}
return(tagCollection);
}
public static double Distance(Geotag g1, Geotag g2)
{
return(Math.Sqrt(Math.Pow(g1.Latitude - g2.Latitude, 2) + Math.Pow(g1.Longitude - g2.Longitude, 2)));
}
