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Digitizing for the future / Steve Snow in xyHt, vol 2021 n° 12 (December 2021)  

Public [article]  inxyHt > vol 2021 n° 12 (December 2021) Titre : Digitizing for the future Type de document : Article/Communication Auteurs : Steve Snow, Auteur Année de publication : 2021 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] image Streetview [Termes IGN] Philadelphie Résumé : (éditeur) Street-level imagery and GIS technologies are turning Philadelphia into one smart city. Every year since 2017, city employees in partnership with experts from Cyclomedia Technology have mapped about 2,800 miles of Philadelphia streets. They captured 360-degree views every 15 feet at street level of high-resolution imagery using light detection and ranging (lidar) technology. Numéro de notice : A2021-903 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.xyht.com/spatial-itgis/digitizing-for-the-future/ Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99260 [article]

Philadelphie, matrice de la ville en damier américaine / Olivier Razemon in Géomètre, n° 2142 (décembre 2016)

Public [article]  inGéomètre > n° 2142 (décembre 2016) . - pp 20 - 21 Titre : Philadelphie, matrice de la ville en damier américaine Type de document : Article/Communication Auteurs : Olivier Razemon, Auteur Année de publication : 2016 Article en page(s) : pp 20 - 21 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géographie humaine [Termes IGN] histoire [Termes IGN] Philadelphie [Termes IGN] plan de ville [Termes IGN] urbanisme [Termes IGN] ville Résumé : (auteur) La ville où fut proclamée l'indépendance des États-Unis présente un plan orthogonal parfait. Une matrice répliquée depuis 300 ans dans de nombreuses villes américaines. Numéro de notice : A2016-952 Affiliation des auteurs : non IGN Thématique : URBANISME Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83452 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
063-2016111	RAB	Revue	Centre de documentation	En réserve L003	Disponible

SPAWNN: A toolkit for SPatial Analysis With Self-Organizing Neural Networks / Julian Hagenauer in Transactions in GIS, vol 20 n° 5 (October 2016)  

Public [article]  inTransactions in GIS > vol 20 n° 5 (October 2016) . - pp 755 – 774 Titre : SPAWNN: A toolkit for SPatial Analysis With Self-Organizing Neural Networks Type de document : Article/Communication Auteurs : Julian Hagenauer, Auteur ; Marco Helbich, Auteur Année de publication : 2016 Article en page(s) : pp 755 – 774 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse combinatoire (maths) [Termes IGN] carte de Kohonen [Termes IGN] données massives [Termes IGN] données socio-économiques [Termes IGN] intelligence artificielle [Termes IGN] logiciel libre [Termes IGN] outil logiciel [Termes IGN] Philadelphie [Vedettes matières IGN] Géovisualisation Résumé : (auteur) This article introduces the SPAWNN toolkit, an innovative toolkit for spatial analysis with self-organizing neural networks, which is published as free and open-source software (http://www.spawnn.org). It extends existing toolkits in three important ways. First, the SPAWNN toolkit distinguishes between self-organizing neural networks and spatial context models with which the networks can be combined to incorporate spatial dependence and provides implementations for both. This distinction maintains modularity and enables a multitude of useful combinations for analyzing spatial data with self-organizing neural networks. Second, SPAWNN interactively links different self-organizing networks and data visualizations in an intuitive manner to facilitate explorative data analysis. Third, it implements cutting-edge clustering algorithms for identifying clusters in the trained networks. Toolkits such as SPAWNN are particularly needed when researchers and practitioners are confronted with large amounts of complex and high-dimensional data. The computational performance of the implemented algorithms is empirically demonstrated using high-dimensional synthetic data sets, while the practical functionality highlighting the distinctive features of the toolkit is illustrated with a case study using socioeconomic data of the city of Philadelphia, Pennsylvania. Numéro de notice : A2016-998 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12180 En ligne : http://dx.doi.org/10.1111/tgis.12180 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83778 [article]

An object-based system for Lidar data fusion and feature extraction / Jarlath P. M. O'Neil-Dunne in Geocarto international, vol 28 n° 3-4 (June - July 2013)  

Public [article]  inGeocarto international > vol 28 n° 3-4 (June - July 2013) . - pp 227 - 242 Titre : An object-based system for Lidar data fusion and feature extraction Type de document : Article/Communication Auteurs : Jarlath P. M. O'Neil-Dunne, Auteur ; Sean W. Macfaden, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 227 - 242 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] carte d'occupation du sol [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] données vectorielles [Termes IGN] extraction de traits caractéristiques [Termes IGN] fusion de données [Termes IGN] image aérienne [Termes IGN] milieu urbain [Termes IGN] modèle orienté objet [Termes IGN] occupation du sol [Termes IGN] Philadelphie [Termes IGN] ville Résumé : (Auteur) In urbanized areas of the developed world, light detection and ranging (LiDAR) exists alongside a wealth of other geospatial information. Despite this bounty, high-resolution land cover is still lacking in many urban areas. This can be attributed to the complexity of many landscapes, the volume of available data and the challenges associated with combining data that were acquired over differing time periods using inconsistent standards. Object-based approaches are ideal for overcoming these limitations. We describe the design, development and deployment of an object-based system that incorporated LiDAR, imagery and vector data sets to develop a comprehensive, multibillion-pixel land-cover data set for the City of Philadelphia. A novel approach using parallel processing allowed us to distribute the feature extraction load to multiple cores, providing massive gains in efficiency and permitting continual modification of the expert system until the accuracy goals of the project were achieved. Numéro de notice : A2013-397 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2012.689015 Date de publication en ligne : 29/05/2012 En ligne : https://doi.org/10.1080/10106049.2012.689015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32535 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-2013021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

The effects of quality control on decreasing error propagation in the LandScan USA population distribution model: a case study of Philadelphia County / L. Patterson in Transactions in GIS, vol 13 n° 2 (April 2009)  

Public [article]  inTransactions in GIS > vol 13 n° 2 (April 2009) . - pp 215 - 228 Titre : The effects of quality control on decreasing error propagation in the LandScan USA population distribution model: a case study of Philadelphia County Type de document : Article/Communication Auteurs : L. Patterson, Auteur ; M. Urban, Auteur ; A. Myers, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 215 - 228 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] contrôle qualité [Termes IGN] démographie [Termes IGN] détection de changement [Termes IGN] géostatistique [Termes IGN] image à moyenne résolution [Termes IGN] Philadelphie [Termes IGN] propagation d'erreur [Termes IGN] répartition géographique Résumé : (Auteur) LandScan USA is a 90 m population distribution model that is used for a variety of applications, including emergency management. Models should have a measure of accuracy; however, the accuracy of population distribution models is difficult to determine due to the inclusion of multiple input datasets and the lack of quantifiable, observable (validated) data to confirm model output. Validated data enables quantification of: (1) overall model accuracy and (2) changes in model output at different levels of quality control. This article examines the effect of quality control for two national school datasets incorporated as input in LandScan USA for Philadelphia County, Pennsylvania; which had a local, validated school dataset available. The effect of each stage of quality control efforts utilized throughout the LandScan USA process were assessed to determine what level of quality control was required to have a statistically significant change of the model's population distribution. The typical level of quality control for LandScan USA resulted in 36% of schools being moved to the correct location and 20% of missing student enrollments were found, compared to 87% and 98% respectively for the validated dataset. The costs of increasing quality control resulted in a six-fold increase in labor time; however, the additional quality control did not produce statistically significant improvements in the LandScan USA model. Thus, typical quality control efforts for schools in LandScan USA produced a population distribution similar to the validated level of quality control, and can be applied with confidence for policy, planning, and emergency situations. Copyright Blackwell Publishing Numéro de notice : A2009-542 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2009.01148.x En ligne : https://doi.org/10.1111/j.1467-9671.2009.01148.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30171 [article]