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Detection of systematic displacements in spatial databases using linear elements / A. Mozas-Calvache in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)  

Public [article]  inCartography and Geographic Information Science > vol 41 n° 4 (September 2014) . - pp 309 - 322 Titre : Detection of systematic displacements in spatial databases using linear elements Type de document : Article/Communication Auteurs : A. Mozas-Calvache, Auteur ; Francisco Javier Ariza-López, Auteur Année de publication : 2014 Article en page(s) : pp 309 - 322 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] analyse de données [Termes IGN] base de données localisées [Termes IGN] détection d'erreur [Termes IGN] erreur systématique [Termes IGN] objet géographique linéaire [Termes IGN] précision de localisation Résumé : (auteur) In this paper, we use control methodologies based on lines to detect the type of positional errors which affect a spatial database (SDB) and more concretely the presence of systematic errors. The methodology involves determination of the displacement vectors between the lines and a graphical and statistical study of the components obtained. The graphical analysis enables the detection of spatial patterns of displacement; the presence or absence of systematic errors is then confirmed by statistical analysis. We have applied this method to detect systematic errors on a set of lines with introduced displacements, rotations and scale changes. The results show the viability of the method. All the bias effects introduced were detected, both qualitatively and quantitatively. The detection method has the potential to minimize the effects of such displacements in the SDBs. Numéro de notice : A2014-427 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.912153 En ligne : https://doi.org/10.1080/15230406.2014.912153 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73964 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Road network selection for medium scales using an extended stroke-mesh combination algorithm / Stefan A. Benz in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)  

Public [article]  inCartography and Geographic Information Science > vol 41 n° 4 (September 2014) . - pp 323 - 339 Titre : Road network selection for medium scales using an extended stroke-mesh combination algorithm Type de document : Article/Communication Auteurs : Stefan A. Benz, Auteur ; Robert Weibel, Auteur Année de publication : 2014 Article en page(s) : pp 323 - 339 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] 1:10.000 [Termes IGN] 1:50.000 [Termes IGN] chaîne de production [Termes IGN] généralisation cartographique automatisée [Termes IGN] maillage [Termes IGN] point d'intérêt [Termes IGN] réseau routier [Termes IGN] Swisstopo Résumé : (auteur) The road network is an essential feature class in topographic maps and databases. Road network selection for smaller scales forms a prerequisite for all other generalization operators and is thus a fundamental operation in the overall process of topographic map and database production. The objective of this paper was to develop an algorithm for automated road network selection from a large-scale (1:10,000) to a medium-scale database (1:50,000). The project was pursued in collaboration with swisstopo, the national mapping agency of Switzerland. Three algorithms (a stroke-based, a mesh-based, and a combined stroke-mesh algorithm) were implemented from the literature and analyzed using swisstopo’s large-scale TLM3D spatial database, with requirements set forth by expert cartographers. Initial experiments showed that the combination algorithm performed best, yet still it could not meet all requirements. Therefore, extensions to the basic stroke-mesh algorithm were developed, significantly improving the selection result with real-world, large test databases. Three extensions introduce modifications to the stroke-mesh combination algorithm. Furthermore, two extensions include external feature classes, ensuring accessibility of points of interest and appropriate network density representation in settlement areas, respectively. The results were evaluated by expert cartographers, who concluded that the proposed approach is ready to be deployed in production at swisstopo. Numéro de notice : A2014-428 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.928482 En ligne : https://doi.org/10.1080/15230406.2014.928482 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73965 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Quantitative morphometric analysis of lakes using GIS: rectangularity R, ellipticity E, orientation O, and the rectangularity vs. ellipticity index, REi / Umberto Lombardo in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)  

Public [article]  inCartography and Geographic Information Science > vol 41 n° 4 (September 2014) . - pp 340 - 347 Titre : Quantitative morphometric analysis of lakes using GIS: rectangularity R, ellipticity E, orientation O, and the rectangularity vs. ellipticity index, REi Type de document : Article/Communication Auteurs : Umberto Lombardo, Auteur Année de publication : 2014 Article en page(s) : pp 340 - 347 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] Bolivie [Termes IGN] ellipticité (géométrie) [Termes IGN] géomorphométrie [Termes IGN] lac [Termes IGN] orientation [Termes IGN] rectangle Résumé : (auteur) Quantitative measures of polygon shapes and orientation are important elements of geospatial analysis. These kinds of measures are particularly valuable in the case of lakes, where shape and orientation patterns can help identifying the geomorphological agents behind lake formation and evolution. However, the lack of built-in tools in commercial geographic information system (GIS) software packages designed for this kind of analysis has meant that many researchers often must rely on tools and workarounds that are not always accurate. Here, an easy-to-use method to measure rectangularity R, ellipticity E, and orientation O is developed. In addition, a new rectangularity vs. ellipticity index, REi, is defined. Following a step-by-step process, it is shown how these measures and index can be easily calculated using a combination of GIS built-in functions. The identification of shapes and estimation of orientations performed by this method is applied to the case study of the geometric and oriented lakes of the Llanos de Moxos, in the Bolivian Amazon, where shape and orientation have been the two most important elements studied to infer possible formation mechanisms. It is shown that, thanks to these new indexes, shape and orientation patterns are unveiled, which would have been hard to identify otherwise. Numéro de notice : A2014-429 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.919540 En ligne : https://doi.org/10.1080/15230406.2014.919540 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73966 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Spacing and alignment rules for effective legend design / Zhilin Li in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)  

Public [article]  inCartography and Geographic Information Science > vol 41 n° 4 (September 2014) . - pp 348 - 362 Titre : Spacing and alignment rules for effective legend design Type de document : Article/Communication Auteurs : Zhilin Li, Auteur ; Zhe Qin, Auteur Année de publication : 2014 Article en page(s) : pp 348 - 362 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rédaction cartographique [Termes IGN] alignement [Termes IGN] légende cartographique [Termes IGN] règle Résumé : (auteur) Legends are important for understanding maps. Legend design is a part of map design and forms an important topic of cartographic research. Most research on legend design concentrates on the development of techniques rather than the development of basic principles. This study is devoted to the latter topic. Particularly, attention is paid to the development of spacing and alignment rules for effective design of legends shown on screens (computer monitors and tablet screens). Based upon Gestalt laws and Bumstead’s rules, a set of spacing and alignment rules is developed. Experimental evaluations are conducted, and the results indicate that a legend designed with proper consideration of the spacing and alignment rules is much more effective and efficient than ordinary legends. Numéro de notice : A2014-430 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.933085 En ligne : https://doi.org/10.1080/15230406.2014.933085 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73967 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Regional land-use allocation using a coupled MAS and GA model: from local simulation to global optimization, a case study in Caidian District, Wuhan, China / Man Yuan in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)  

Public [article]  inCartography and Geographic Information Science > vol 41 n° 4 (September 2014) . - pp 363 - 378 Titre : Regional land-use allocation using a coupled MAS and GA model: from local simulation to global optimization, a case study in Caidian District, Wuhan, China Type de document : Article/Communication Auteurs : Man Yuan, Auteur ; Yaolin Liu, Auteur ; Jianhua He, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 363 - 378 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] algorithme génétique [Termes IGN] développement durable [Termes IGN] optimisation (mathématiques) [Termes IGN] simulation [Termes IGN] système multi-agents [Termes IGN] utilisation du sol [Termes IGN] Wuhan (Chine) Résumé : (auteur) China is facing the pressures of both rapid economic development and environmental protection, and land-use allocation optimization is an important way to manage the conflicts between these pressures and to achieve sustainable development. Optimization of land-use allocation is a nonlinear multiobjective spatial optimization problem, and a purely local simulation model or global optimization model is insufficient to solve it. It is essential to bridge the gap between the two models through the combination of top-down and bottom-up approaches. This study integrates a multiagent system (MAS) that simulates the behaviors of land-use stakeholders with regard to their choices of specific locations, with a genetic algorithm (GA) that simultaneously evaluates and optimizes land-use configurations to meet various regional development objectives. The model is expected to achieve the optimization of land use in terms of the composition and spatial configuration. Caidian District, Wuhan, China, was chosen as the study area to test the model in this paper. The results show that the performance of the coupled model is superior to a pure GA model or MAS model. The optimal configuration improves on the economic output, spatial compactness, and carbon storage of the current configuration and promotes sustainable regional land-use development from the local scale to the regional scale. Numéro de notice : A2014-431 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.931251 En ligne : https://doi.org/10.1080/15230406.2014.931251 Format de la ressource électronique : URL ARTICLE Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73968 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

The development of integrated terrestrial and marine pathways in the Argo-Saronic region, Greece / J. M. L. Newhard in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)  

Public [article]  inCartography and Geographic Information Science > vol 41 n° 4 (September 2014) . - pp 379 - 390 Titre : The development of integrated terrestrial and marine pathways in the Argo-Saronic region, Greece Type de document : Article/Communication Auteurs : J. M. L. Newhard, Auteur ; N. S. Levine, Auteur ; A. D. Phebus, Auteur Année de publication : 2014 Article en page(s) : pp 379 - 390 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] âge du bronze [Termes IGN] chemin le moins coûteux, algorithme du [Termes IGN] Egée, mer [Termes IGN] Grèce [Termes IGN] voie de communication Résumé : (auteur) Least cost path applications can be a powerful tool for understanding connectivity across a landscape. A limitation to this method is its difficulty in integrating terrestrial, marine, and cultural factors – all of which would have been at play in the prehistoric Aegean. This study looks at a method of modeling pathways that integrates major factors (land, sea, and culture) that would be in play while considering medium- to long-distance travel in the Aegean. This test case explores the possible relationships between proposed routes for communication and identified coastal sites with parameters modeled in geographic information system that affect travel in cultural, marine, and terrestrial contexts. The methods presented have significance beyond the Late Bronze Age Aegean. The development of a methodology that incorporates marine, cultural, and terrestrial environments provides a mechanism by which specific hypotheses regarding complex communication routes may be addressed in regions of the world where there is an intensive interplay between terrestrial and marine geographies. Numéro de notice : A2014-432 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.925786 En ligne : https://doi.org/10.1080/15230406.2014.925786 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73969 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible