Results 31 to 40 of about 981,881 (296)

Hierarchical Segmentation Method for Generating Road Intersections from Crowdsourced Trajectory Data

open access: yesApplied Sciences, 2022
Maintaining the data freshness and completeness of road intersection information is the key task of urban road map production and updating. Compared to professional surveying methods, crowdsourced trajectory data provide a low-cost, wide-coverage and ...
Yunfei Zhang   +5 more
doaj   +1 more source

Node Density Estimation in VANETs Using Received Signal Power [PDF]

open access: yes, 2015
Accurately estimating node density in Vehicular Ad hoc Networks, VANETs, is a challenging and crucial task. Various approaches exist, yet none takes advantage of physical layer parameters in a distributed fashion.
Fontan, F. P.   +2 more
core   +2 more sources

Individual and synergistic effects of habitat loss and roads on reptile occupancy

open access: yesGlobal Ecology and Conservation, 2021
Habitat loss and road mortality pose severe threats to wildlife by reducing available resources, increasing mortality rates, and fragmenting remaining habitat into smaller patches.
James E. Paterson   +6 more
doaj   +1 more source

Density Adaptive Approach for Generating Road Network From GPS Trajectories

open access: yesIEEE Access, 2020
Road networks are fundamental parts of intelligent transportation and smart cities. With the emergence of crowdsourcing geographic data, road mapping approaches by using crowdsourcing trajectories have been developed.
Zhongliang Fu   +3 more
doaj   +1 more source

Co-evolution of density and topology in a simple model of city formation

open access: yes, 2008
We study the influence that population density and the road network have on each others' growth and evolution. We use a simple model of formation and evolution of city roads which reproduces the most important empirical features of street networks in ...
A Bejan   +50 more
core   +2 more sources

Not only the butterflies: managing ants on road verges to benefit Phengaris (Maculinea) butterflies [PDF]

open access: yes, 2010
Obligate myrmecophilic butterfly species, such as Phengaris (Maculinea) teleius and P. nausithous, have narrow habitat requirements. Living as a caterpillar in the nests of the ant species Myrmica scabrinodis and M.
Gestel, R., van   +3 more
core   +2 more sources

Population Density: An Underlying Mechanism Between Road Transportation and Environmental Quality

open access: yesFrontiers in Environmental Science, 2022
Mounting degradation in the environmental quality (EQL), specifically from the transport industry, is a big threat and challenge for sustainable development.
Ashraf Ud Din   +4 more
doaj   +1 more source

Road infrastructure in the regions of the Slovak Republic and Poland

open access: yesBulletin of Geography. Socio-Economic Series, 2016
One of the important assumptions and factors of social and economic development of countries and their regions is road infrastructure. This is particularly true in countries where road transport is the largest component of overall transportation, such as
Masárová Jana, Ivanová Eva
doaj   +1 more source

Assessing the Impacts of Urbanization on Sex Ratios of Painted Turtles (Chrysemys picta)

open access: yesDiversity, 2019
Turtles are particularly susceptible to the negative impacts of urbanization due to low mobility and a life history strategy emphasizing long generation times and high adult survival.
John P. Vanek, Gary A. Glowacki
doaj   +1 more source

COMPARISON OF HIGH AND LOW DENSITY AIRBORNE LIDAR DATA FOR FOREST ROAD QUALITY ASSESSMENT [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Good quality forest roads are important for forest management. Airborne laser scanning data can help create automatized road quality detection, thus avoiding field visits.
K. Kiss, J. Malinen, T. Tokola
doaj   +1 more source

Home - About - Disclaimer - Privacy