Saman Koswatte

Faculty of Geomatics - Sabaragamuwa University · Remote Sensing and GIS

Modern disaster reporting is becoming increasingly sophisticated with the ready access to social media and user-friendly online mapping tools. Citizen engagement in location enabled disaster reporting is more obvious, and the availability of crowd generated geospatial data is higher than ever before. Crowd generated geospatial content is current an...

Abstract In modern society, the increased popularity of social media has significantly changed the reporting and sharing disaster related information. The Volunteered Geographic Information (VGI) can be considered as a special case of the more general web phenomenon of User Generated Content (UGC). Interestingly, VGI is more current and more divers...

Crowdsourced Data (CSD) has recently received increased attention in many application areas including disaster management. Convenience of production and use, data currency and abundancy are some of the key reasons for attracting this high interest. Conversely, quality issues like incompleteness, credibility and relevancy prevent the direct use of s...

Accurate and up to date road data is very crucial for effective urban planning, infrastructure development, navigation applications, military purposes and for updating topographic GIS databases. Spatial resolutions of remote sensing images are rapidly increasing. It enables a good source for extracting road information. This research has developed...

Natural disasters, including floods, cause significant damage to people’s lives and properties and, in recent years, the frequency, complexity, and severity of these events appear to be increasing. Floods, in particular, cause more devastation, death, and economic impact than any other natural disaster. Disaster reporting has now progressed from of...

The recent climate changes have significantly increased the number and intensity of natural disasters around the world. This includes floods that cause a great deal of damage to properties, and more importantly, to the lives of the people. The reporting of current disasters has changed from official media to public reporters through social media an...

Total of 152 water samples from CKD/CKDu endemic areas and 30 water samples from non-CKDu prevalent areas in the Moneragala District were collected separately. pH values of water samples varied from 5.04 to 8.37 which are within the permissible limit prescribed by World Health Organization. More than 15% of water samples showed low Dissolved Oxygen...

Crowdsourced data (CSD) generated by citizens is becoming more popular as its potential utilization in many applications increases due to its currency and availability. However, the quality of CSD, including its relevance, is often questioned as the data is not generated by professionals nor follows standard data-collection procedures. The quality...

Crowdsourced Data (CSD) generated by citizens is becoming more popular as its potential utilisation in many applications is increasing due to its currency and availability. However, the quality of CSD, including its relevance, is often questioned as the data is not generated by professionals nor follows standard data collection procedures. The qual...

Volunteered Geographic Information (VGI) or Crowdsourced Data (CSD) generated by citizens is becoming more popular as its potential utilisation in many applications is increasing due to its currency and availability. However, the quality of VGI and CSD including its relevance is often questioned as they are not generated by professionals or follow...

Volunteered geographic information (VGI) can be considered a subset of crowdsourced data (CSD) and its popularity has recently increased in a number of application areas. Disaster management is one of its key application areas in which the benefits of VGI and CSD are potentially very high. However, quality issues such as credibility, reliability an...

Crowdsourced Data (CSD) has recently received increased attention in many application areas including disaster management. Convenience of production and use, data currency and abundancy are some of the key reasons for attracting this high interest. Conversely, quality issues like incompleteness, credibility and relevancy prevent the direct use of s...