crowdsourced GIS


OpenSfM in actionOpenSfM in action

The Future of Street Level Photos in Mapping

Using mobile phones, 360-degree cameras, car dashboards and helmet cameras, Mapillary’s users take geo-tagged pictures of the roads they travel which the app automatically uploads to Mapillary’s platform. Then, Mapillary stitches the photos together and turns them into an immersive, navigable, street level view of the world.

Join MapLift to Help Fix Maps on Wikipedia

The North American Cartographic Information Society and the FixWikiMaps Project are organizing the first ever MapLift from August 28th through September 4th this year.  MapLift is a program to identify and fix bad, outdated, or incomplete maps on Wikipedia.  Volunteers are being solicited to help with the program.  Those interested can signup via the MapLift signup […]

Waze's traffic data includes the option of reporting the location of nearby police.Waze's traffic data includes the option of reporting the location of nearby police.

Police versus Waze

Over fifty million users have downloaded Waze.  Waze is a crowdsourcing traffic app that relies on user inputs to tell other users where there are traffic problems such as accidents.  The reporting function of Waze also includes the ability to alert other drivers about speed traps and the location of […]

iSPEX map compiled from all iSPEX measurements performed in the Netherlands on July 8, 2013, between 14:00 and 21:00. Each blue dot represents one of the total of 6007 measurements that were submitted that day. At each location on the map, the 50 nearest iSPEX measurements were averaged and converted to Aerosol Optical Thickness, a measure for the total amount of atmospheric particles. This map can be compared to the AOT data from the MODIS Aqua satellite, which flew over the Netherlands at 16:12 local time. The relatively high AOT values were caused by smoke clouds from forest fires in North America, that were blown over the Netherlands at an altitude of 2-4 km. In the course of the day, the northerly winds brought clearer air to the northern provinces.iSPEX map compiled from all iSPEX measurements performed in the Netherlands on July 8, 2013, between 14:00 and 21:00. Each blue dot represents one of the total of 6007 measurements that were submitted that day. At each location on the map, the 50 nearest iSPEX measurements were averaged and converted to Aerosol Optical Thickness, a measure for the total amount of atmospheric particles. This map can be compared to the AOT data from the MODIS Aqua satellite, which flew over the Netherlands at 16:12 local time. The relatively high AOT values were caused by smoke clouds from forest fires in North America, that were blown over the Netherlands at an altitude of 2-4 km. In the course of the day, the northerly winds brought clearer air to the northern provinces.

Using Citizens to Map Atmospheric Particulates

Dutch researchers were able to successfully map levels of atmospheric particulates by pulling data from over 8,000 smartphone users.  A team from the University of Leiden in the Netherlands developed a smart-phone adaptor called an iSPEX.  This inexpensive, mass-producible add-on is attached to the front of the phone’s camera that […]