Data We have a large number (~2,000,000) of data points obtained from a GPS tracking software called CoPilot Live, available from ALK Technologies. The data are sampled from participating users’ devices at 3-second intervals. Each ID represents a trip made by a certain user. There are about 1300 users, scattered around the United States. The average user’s recorded travel time is about 90 minut...

People with disabilities face many obstacles in everyday outdoor travels. One of the most notable obstacles is steep slope on sidewalk segments. Current navigation systems/services do not all support map databases with slope attributes and cannot calculate sidewalk slope in real time. In this paper, we present a technique for calculating slopes of sidewalk segments by image data and predict the...

With the proliferation of GPS tracking data provided by smartphone apps, it is desirable to develop a data processing and anonymizing framework to transform raw GPS data into a suitable format for transport planning models. The paper aims to describe an effort to address such issues by map matching and aggregating the GPS information derived from a journey planning app. The effectiveness and fl...

wildfire in forests and rangelands, apart from its initiating causes, is considered as an ecological disaster. zoning natural areas according to their susceptibility to fire helps to put off operations and reduces catastrophic losses caused through a wise management plan. in this study, the zoning map of wildfire risk in forest and rangeland areas has been produced using gis, analytical hierarc...