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Legal issues in maps built on third party base layers / A. Saunders in Geomatica, vol 66 n° 4 (December 2012)  

Public [article]  inGeomatica > vol 66 n° 4 (December 2012) . - pp 279 - 290 Titre : Legal issues in maps built on third party base layers Type de document : Article/Communication Auteurs : A. Saunders, Auteur ; Teresa Scassa, Auteur ; T. Lauriault, Auteur Année de publication : 2012 Article en page(s) : pp 279 - 290 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] base de données localisées [Termes IGN] base de données thématiques [Termes IGN] carte sur mesure [Termes IGN] couche thématique [Termes IGN] données localisées des bénévoles [Termes IGN] droit public [Termes IGN] gestion des droits numériques [Termes IGN] propriété industrielle [Termes IGN] système d'information géographique [Termes IGN] Web Map Service Résumé : (Auteur) The recent growth in citizen map-making ability has been brought about in part by the availability of base layers of geospatial information on which maps can be built, as well as software tools that allow geographic information to be represented. However, the legal relationship between the creator of the map and the owner of the base layer has received relatively little attention. In this paper, we consider legal issues regarding volunteered geographic information (VGI) submitted to third-party geographic information systems (GIS). This combination raises issues of copyright, database rights, trademark, and End User License Agreements (EULAS). The paper will consider the IP rights on which the EULAs are founded and the corresponding rights of those who build their own maps onto the base layers; analyze some of the key EULAs in this area, and identify important issues for those who create maps using these base layers. Numéro de notice : A2012-656 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article DOI : 10.5623/cig2012-054 En ligne : https://doi.org/10.5623/cig2012-054 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32102 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
035-2012041	SL	Revue	Centre de documentation	Revues en salle	Disponible

Impact of the quality of spatial 3D city models on sensor networks placement optimization / M. Argany in Geomatica, vol 66 n° 4 (December 2012)  

Public [article]  inGeomatica > vol 66 n° 4 (December 2012) . - pp 291 - 305 Titre : Impact of the quality of spatial 3D city models on sensor networks placement optimization Type de document : Article/Communication Auteurs : M. Argany, Auteur ; Mir Abolfazl Mostafavi, Auteur ; V. Akbarzadeh, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 291 - 305 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] capteur terrestre [Termes IGN] données localisées dynamiques [Termes IGN] milieu urbain [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] optimisation (mathématiques) [Termes IGN] qualité des données [Termes IGN] réseau de capteurs [Termes IGN] surveillance Résumé : (Auteur) Sensor networks are increasingly used for tracking, monitoring, and observing spatial dynamic phenomena in the real world (e.g. urban area). In order to ensure an efficient deployment of a sensor network, several optimization algorithms have been proposed in recent years. Most of these algorithms often rely on oversimplified sensor models. In addition, they do not consider information on the terrain topography, city models, and the presence of diverse obstacles in the sensing area (e.g. buildings, trees, poles). Only some of those optimization algorithms attempt to consider the terrain information in the optimization of a sensor network deployment. However, most of these algorithms consider that the spatial models used for this purpose are perfect representations of the reality and are not sensitive to the quality of the information. However, spatial models are simplified representations of a complex reality, and hence are inherently uncertain. In this paper we will investigate the impact of the spatial data quality on the optimization of a sensor network and its spatial coverage in an urban area. For this purpose, we will investigate specific implications of spatial data quality criteria for a 3D city model that will be used in sensor network optimization algorithms. Then, we will analyze the impact of some of those criteria on the estimation of sensor network coverage. Afterwards, a case study for sensor network deployment in an urban area will be presented. This case study will demonstrate the impact of 3D city models quality on the estimation of coverage using global and local optimization algorithms. Finally, the results obtained from this experimentation will be presented and discussed. Numéro de notice : A2012-657 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE/SOCIETE NUMERIQUE Nature : Article DOI : 10.5623/cig2012-055 En ligne : https://doi.org/10.5623/cig2012-055 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32103 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
035-2012041	SL	Revue	Centre de documentation	Revues en salle	Disponible

Introduction to a portable stereo mapping system for unmanned vehicles / Julien Li-Chee-Ming in Geomatica, vol 66 n° 4 (December 2012)  

Public [article]  inGeomatica > vol 66 n° 4 (December 2012) . - pp 323 - 332 Titre : Introduction to a portable stereo mapping system for unmanned vehicles Type de document : Article/Communication Auteurs : Julien Li-Chee-Ming, Auteur ; Costas Armenakis, Auteur Année de publication : 2012 Article en page(s) : pp 323 - 332 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] centrale inertielle [Termes IGN] drone [Termes IGN] étalonnage d'instrument [Termes IGN] géoréférencement direct [Termes IGN] GPS en mode différentiel [Termes IGN] GPS-INS [Termes IGN] microsystème électromécanique [Termes IGN] modèle stéréoscopique [Termes IGN] système de numérisation mobile [Termes IGN] véhicule sans pilote Résumé : (Auteur) This work introduces a Mobile Stereo Mapping System (MSMS) designed for remote operation onboard unmanned vehicles for navigation and rapid collection of 3D spatial data through direct georeferencing and integration of optical and multiple navigation sensors. By avoiding the need for ground control points, the system offers a low-cost mapping solution for both kinematic and static cases, rapid deployments, high data resolutions, and low risk to operators. Position estimation of the camera is based on differential GPS, loosely coupled in a Kalman filter with a low-cost Micro Electro-Mechanical Systems (MEMS) based Inertial Measurement Unit (IMU). Attitude is estimated from gyroscope data, aided by accelerometer and magnetometer data to compensate for gyro drift. Two low-cost consumer digital cameras are calibrated and time-synchronized with the GPS/IMU to provide directly georeferenced stereo imagery. The MSMS determines mapping coordinates using photogrammetric solutions modified for direct georeferencing. A calibration process has been developed for the sensor components and the integrated system itself to determine systematic errors and biases, and to determine the relative geometry of the sensors. Object space accuracies (Root Mean Square Error (RMSE)) in the range of 1/100 at camera-to-object distances of about 30m were achieved using wide baseline overlapping images taken from two separate positions of the stereo-metric MSMS. The system design and the calibration and mapping accuracy of the MSMS are presented and assessed using field testing. Numéro de notice : A2012-658 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.5623/cig2012-057 En ligne : https://doi.org/10.5623/cig2012-057 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32104 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
035-2012041	SL	Revue	Centre de documentation	Revues en salle	Disponible