Results 21 to 30 of about 200,465 (268)

Vectorized rooftop area data for 90 cities in China

open access: yesScientific Data, 2022
Measurement(s) building rooftop area Technology Type(s) computational modeling technique Sample Characteristic - Environment city Sample Characteristic - Location ...
Zhixin Zhang   +13 more
doaj   +1 more source

Geographic Knowledge Graph (GeoKG): A Formalized Geographic Knowledge Representation

open access: yesISPRS International Journal of Geo-Information, 2019
Formalized knowledge representation is the foundation of Big Data computing, mining and visualization. Current knowledge representations regard information as items linked to relevant objects or concepts by tree or graph structures.
Shu Wang   +5 more
doaj   +1 more source

SVM+KF Target Tracking Strategy Using the Signal Strength in Wireless Sensor Networks

open access: yesSensors, 2020
Target Tracking (TT) is a fundamental application of wireless sensor networks. TT based on received signal strength indication (RSSI) is by far the cheapest and simplest approach, but suffers from a low stability and precision owing to multiple paths ...
Xing Wang   +4 more
doaj   +1 more source

Urban Water Quality Assessment Based on Remote Sensing Reflectance Optical Classification

open access: yesRemote Sensing, 2021
With the acceleration of urbanization, increasing water pollution means that monitoring and evaluating urban water quality are of great importance.
Xiaolan Cai   +9 more
doaj   +1 more source

Optimal Route Searching with Multiple Dynamical Constraints—A Geometric Algebra Approach

open access: yesISPRS International Journal of Geo-Information, 2018
The process of searching for a dynamic constrained optimal path has received increasing attention in traffic planning, evacuation, and personalized or collaborative traffic service. As most existing multiple constrained optimal path (MCOP) methods cannot
Dongshuang Li   +5 more
doaj   +1 more source

Hole Filling of Single Building Point Cloud Considering Local Similarity among Floors

open access: yesRemote Sensing, 2022
In the process of acquiring a point cloud, due to the shielding of the building itself and other ground objects (such as vegetation), the collected point cloud cannot cover the building facades surface uniformly and completely, and can produce several ...
Xiangqiang Min   +5 more
doaj   +1 more source

A Method of Directional Signs Location Selection and Content Generation in Scenic Areas

open access: yesISPRS International Journal of Geo-Information, 2020
The Tourist Oriented Directional Signs (TODS) system is an essential and important project in constructing and planning scenic areas. At present, the placement of directional signs generally depends on the personal experience of the tour manager to ...
Ling Ruan   +4 more
doaj   +1 more source

From Virtual Environment to Virtual Community [PDF]

open access: yes, 2001
We discuss a virtual reality theater environment and its transition to a virtual community by adding domain agents and by allowing multiple users to visit this environment. The environment has been built using VRML (Virtual Reality Modeling Language). We discuss how our ideas about this environment changed in time by adding more facilities to it and by
openaire   +2 more sources

Barycenter reflected equatorial Pacific sea level structure evolution and its indication of ENSO events

open access: yesOceanologia, 2015
Focused on the zonal and meridional response of sea level change to El Niño-Southern Oscillation (ENSO) events, this paper retrieves the overall average, positive anomaly and negative anomaly sea surface height (SSH) series of equatorial Pacific area ...
Wen Luo   +4 more
doaj   +1 more source

Quantifying and Characterizing Urban Leisure Activities by Merging Multiple Sensing Big Data: A Case Study of Nanjing, China

open access: yesLand, 2021
Studying the spatiotemporal pattern of urban leisure activities helps us to understand the development and utilization of urban public space, people’s quality of life, and the happiness index.
Shaojun Liu   +3 more
doaj   +1 more source

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