tag:blogger.com,1999:blog-5186518745079204935.post1596498776073945935..comments2023-10-09T18:20:31.025+02:00Comments on Volunteered Geographic Information for Crisis Mapping: Neogeography and Volunteered Geographic Information: Theories and Concepts - By Sarah LabusgaJoão Portohttp://www.blogger.com/profile/12671005569879277144noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-5186518745079204935.post-42255270762994242262013-05-09T19:52:56.546+02:002013-05-09T19:52:56.546+02:00Totally agree, these approaches have proven to wor...Totally agree, these approaches have proven to work. The question remains, how to detect wrong information in an crisis situation where the people in charge cannot wait for others to correct the data...Anonymoushttps://www.blogger.com/profile/10410033155902751067noreply@blogger.comtag:blogger.com,1999:blog-5186518745079204935.post-13653585507569412482013-05-09T16:51:44.689+02:002013-05-09T16:51:44.689+02:00I would say to decrease unreliable information by ...I would say to decrease unreliable information by using "trust levels" or by correcting the wrong data by contributors themselves is a good approach. However there has to be done more because information must be accurately, particularly in crisis management where lives are at risk and every mistake could have fatal follow-up.Werner Clödynoreply@blogger.comtag:blogger.com,1999:blog-5186518745079204935.post-85263513046850517962013-05-07T16:01:45.372+02:002013-05-07T16:01:45.372+02:00What is the importance of Social Media, the concep...What is the importance of Social Media, the concept of "citizens as sensors" and "Neogeography" for Crisis Management and Humanitarian Help?Anonymoushttps://www.blogger.com/profile/05263434539979530500noreply@blogger.comtag:blogger.com,1999:blog-5186518745079204935.post-43116497508046600172013-05-07T16:00:23.608+02:002013-05-07T16:00:23.608+02:00If we look and wikipedia, wikimapia and OSM: Aren&...If we look and wikipedia, wikimapia and OSM: Aren't the contributors themselves the instances who correct wrong data entries? One could try that by adding wrong content to OSM and see how long it takes until the error is fixed by another mapper.<br /><br />As for "trust levels" in ther twitter-sphere we could observe some cases in past disaster situations where some people became highly trusted sources information based on the tweets they sent and based on their twitter profile and the people who followed these particular persons...Anonymoushttps://www.blogger.com/profile/05263434539979530500noreply@blogger.comtag:blogger.com,1999:blog-5186518745079204935.post-63778120894629822302013-05-07T15:55:33.484+02:002013-05-07T15:55:33.484+02:00In the case of VGI and OSM, a "data model&quo...In the case of VGI and OSM, a "data model" is constantly developed along the growth of the OSM map. Thus, the contributor of geo-information has to comply with the rules of the data model, or "geo-tags" which a provided with the data model.<br />In terms of everyone's own perception, isn't it very interesting to see what actually is mapped and what isn't? If we change our perception of what is "correct" and what is "wrong" we can pull out much more information about societies from maps. Sometimes, we maybe have to forget of what we learned about the classic rules of cartography to find stories about cultures and societies in maps? :-) <br /><br />However, when it comes to Crisis Managament and Crisis Mapping, evaluation and verifying geotagged information is a crucial point! Tools like Flickr, youtube, Twitter, facebook et al. enable us to geotag social media content on the fly and these information are widely used by humanitarian responders to get a better situational awarenees in crisis situations. But how do we know, which social media information is right and which is wrong? One might be interested in reading the excellent blogpost of Patrick Meier on how to verify (geotagged) social media information in disaster situations here:<br />http://irevolution.net/2011/11/29/information-forensics-five-case-studies/Anonymoushttps://www.blogger.com/profile/05263434539979530500noreply@blogger.comtag:blogger.com,1999:blog-5186518745079204935.post-79019676883342240532013-05-05T10:20:23.541+02:002013-05-05T10:20:23.541+02:00Due to different semantic awareness of each "...Due to different semantic awareness of each "sensor" it is hard to interpret the observations and thus create general information. To counter this, predefined classes could be offered for personal observations which on the other hand results in a data fuzziness. Since the "pure" personal data is very valuable, maybe the users should not be restricted to tightly structured forms - a decision the offering platforms have to make.<br />For the "black sheep" problem: Mechanisms need to be established that automatically detect errors and malicious contributions so it can be ensured that the information is reliable. This would assume the development of automate accuracy assurance systems and/or intelligent algorithms.<br />Also some kind of trust levels for human observers based on the quality of their previous observations could be introduced.Anonymoushttps://www.blogger.com/profile/06481483466469414363noreply@blogger.comtag:blogger.com,1999:blog-5186518745079204935.post-41595825060897898402013-05-04T18:01:37.692+02:002013-05-04T18:01:37.692+02:00Comment by Louisa Schneider:
The question arises...Comment by Louisa Schneider:<br /><br /><br />The question arises how to evaluate such subjective data, and how to avoid "black sheeps". One challenge is to develop information systems that generalize the subjective information, process, and classify it in the correct way. It has become scientifically recognized that the definition of space is always the outcome of perception. However, how is it possible to provide correct data, if everyone can put his own perception, and thus his own experiences, feelings etc. into it? Or, in doing so - since everyone can monitor and correct each other - do we even get closer to 'reality'? Moreover, is it possible that the quality is improved by this kind of self-regulation? Anonymoushttps://www.blogger.com/profile/05263434539979530500noreply@blogger.comtag:blogger.com,1999:blog-5186518745079204935.post-47756292937916607842013-05-04T17:36:36.524+02:002013-05-04T17:36:36.524+02:00Would be interesting in which extent VGI is alread...Would be interesting in which extent VGI is already used for commercial purpose and how much private companies are interested in solving named problems/issues like spatial data infrastructure for VGI.Robin Petershttps://www.blogger.com/profile/06459833693700103038noreply@blogger.comtag:blogger.com,1999:blog-5186518745079204935.post-29254705199807000182013-05-04T16:25:54.765+02:002013-05-04T16:25:54.765+02:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/05263434539979530500noreply@blogger.com