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Auteur Cynthia A. Brewer |
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Affiner la recherche Interroger des sources externesEvaluating data stability in aggregation structures across spatial scales: revisiting the modifiable areal unit problem / Jonathan K. Nelson in Cartography and Geographic Information Science, Vol 44 n° 1 (January 2017)
Titre : Evaluating data stability in aggregation structures across spatial scales: revisiting the modifiable areal unit problem Type de document : Article/Communication Auteurs : Jonathan K. Nelson, Auteur ; Cynthia A. Brewer, Auteur Année de publication : 2017 Article en page(s) : pp 35 - 50 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse diachronique
[Termes IGN] exploration de données géographiques
[Termes IGN] maladie non infectieuse
[Termes IGN] mise à l'échelle
[Termes IGN] Pennsylvanie (Etats-Unis)
[Termes IGN] problème d'unité zonale modifiable
[Termes IGN] regroupement de donnéesRésumé : (auteur) Socioeconomic and health analysts commonly rely on areally aggregated data, in part because government regulations on confidentiality prohibit data release at the individual level. Analytical results from areally aggregated data, however, are sensitive to the modifiable areal unit problem (MAUP). Levels of aggregation as well as the arbitrary and modifiable sizes, shapes, and arrangements of zones affect the validity and reliability of findings from analyses of areally aggregated data. MAUP, long acknowledged, remains unresolved. We present an exploratory spatial data analytical approach (ESDA) to understand the scalar effects of MAUP. To characterize relationships between data aggregation structures and spatial scales, we develop a method for statistically and visually exploring the local indicators of spatial association (LISA) exhibited between a variable and itself across varying levels of aggregation. We demonstrate our approach by analyzing the across-scale relationships of aggregated 2010 median income for the State of Pennsylvania and 2005–2009 cancer diagnosis rates for the State of New York between county–tract, tract–block group, and county–block group level US census designated enumeration units. This method for understanding the relationship between MAUP and spatial scale provides guidance to researchers in selecting the most appropriate scales to aggregate, analyze, and represent data for problem-specific analyses. Numéro de notice : A2017-100 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2015.1093431 En ligne : https://doi.org/10.1080/15230406.2015.1093431 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84479
in Cartography and Geographic Information Science > Vol 44 n° 1 (January 2017) . - pp 35 - 50[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-2017011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : An impressionistic cartographic solution for base map land cover with coarse pixel data Type de document : Article/Communication Auteurs : Paulo Raposo, Auteur ; Cynthia A. Brewer, Auteur ; Kevin Sparks, Auteur Année de publication : 2016 Article en page(s) : pp 5 - 21 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] ArcGIS
[Termes IGN] carte d'occupation du sol
[Termes IGN] carte topographique
[Termes IGN] données maillées
[Termes IGN] échantillonnage de données
[Termes IGN] généralisation cartographique
[Termes IGN] généralisation de base de données
[Termes IGN] incertitude géométrique
[Vedettes matières IGN] GénéralisationRésumé : (auteur) Several everyday cartography applications do not require sharply precise base maps, and in fact benefit from their generalization or deliberate obscuration, such as tourist or transit maps. Additionally, raster data fine enough for a given map scale are not always available. We present a method of creating an impressionistic land cover base map for topographic mapping in which the above two conditions are true, using the National Land Cover Database (NLCD) of the US Geological Survey (USGS). The method is based on reclassification, upsampling, constrained randomization at class boundary edges, and deliberate use of colors with very similar lightness values. The method spans both scientific geospatial data treatment and artistic cartographic design, and both generalizes and enhances the data. The processing, automated in ArcGIS™, is detailed, and examples of the product are provided. Numéro de notice : A2016--124 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.14714/CP83.1351 En ligne : http://dx.doi.org/10.14714/CP83.1351 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84968
in Cartographic perspectives > n° 83 (2016) . - pp 5 - 21[article]
Titre : Landscape preference and map readability in design evaluation of topographic maps with an orthoimage background Type de document : Article/Communication Auteurs : Paulo Raposo, Auteur ; Cynthia A. Brewer, Auteur Année de publication : 2014 Article en page(s) : pp 25 - 37 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie
[Termes IGN] carte topographique
[Termes IGN] conception cartographique
[Termes IGN] estompage
[Termes IGN] lisibilité perceptive
[Termes IGN] orthoimage
[Termes IGN] réalité augmentéeRésumé : (Auteur) Orthoimagery and shaded relief are ways of introducing realism to maps, but each method presents design challenges in achieving consistently readable combinations with overlaid vector symbols and labels. Two studies were conducted to compare the readability of the current United States Geological Survey (USGS) ‘US Topo’ map series with two original designs incorporating orthoimagery and shaded relief. The studies examined reader design ratings after completing tasks that required analytical use of maps with varied map designs, using maps of diverse locations in the USA. The studies indicated that readability varied with map location to a greater degree than with map design, though design influence on ratings was detected in interaction with location. This variation with landscape is discussed from the perspective of recent theory in landscape aesthetics and preferences. Also, it was statistically demonstrated that either of the two new designs had improved readability over the existing US Topo. These studies reveal that user evaluations of maps are dependent on landscape preferences as well as on design, and demonstrate the importance of national topographic map design evaluation across a wide sample of national landscapes. Numéro de notice : A2014-127 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277412Y.0000000027 En ligne : https://doi.org/10.1179/1743277412Y.0000000027 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33032
in Cartographic journal (the) > vol 51 n° 1 (February 2014) . - pp 25 - 37[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 030-2014011 RAB Revue Centre de documentation En réserve L003 Disponible Abstracting geographic information in a data rich world, ch. 11. Generalisation in practice within national mapping agencies / Cécile Duchêne (2014)
Titre de série : Abstracting geographic information in a data rich world, ch. 11 Titre : Generalisation in practice within national mapping agencies Type de document : Chapitre/Contribution Auteurs : Cécile Duchêne Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2014 Collection : Lecture notes in Geoinformation and Cartography, ISSN 1863-2246 Importance : pp 329 - 391 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] base de données localisées
[Termes IGN] chaîne de production
[Termes IGN] chaîne de traitement
[Termes IGN] généralisation automatique de données
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] représentation multiple
[Vedettes matières IGN] GénéralisationRésumé : (auteur) National Mapping Agencies (NMAs) are still among the main end users of research into automated generalisation, which is transferred into their production lines via various means. This chapter includes contributions from seven NMAs, illustrating how automated generalisation is used in practice within their partly or fully automated databases and maps production lines, what results are currently being obtained and what further developments are on-going or planned. A contribution by the European Joint Research Center reports on the use of multiple representation and generalisation in the context of the implementation of the European INSPIRE directive. The chapter finishes with a synthesis of recent achievements, as well as future challenges that NMAs have begun to tackle. Numéro de notice : H2014-008 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Chapître / contribution nature-HAL : ChOuvrScient DOI : 10.1007/978-3-319-00203-3_11 Date de publication en ligne : 01/04/2014 En ligne : http://dx.doi.org/10.1007/978-3-319-00203-3_11 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78635
Titre : Automated thinning of road networks and road labels for multiscale design of The National Map of the United States Type de document : Article/Communication Auteurs : Cynthia A. Brewer, Auteur ; Lauwrence V. Stanislawski, Auteur ; Barbara P. Buttenfield, Auteur Année de publication : 2013 Article en page(s) : pp 259 - 270 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] carte topographique
[Termes IGN] conception cartographique
[Termes IGN] Etats-Unis
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] réseau routier
[Termes IGN] simplification de contour
[Termes IGN] The National Map (USA)
[Termes IGN] traitement automatique de données
[Termes IGN] traitement géométrique de donnéesRésumé : (Auteur) This paper reports on progress in generalization and selective feature removal for a subset of fundamental base map layers that enables competent mapping through scales ranging from 1:24,000 to 1:1,000,000. Thinning and partitioning methods are applied to road features and labels for The National Map of the United States. Roads are thinned adaptively using the ArcGIS Thin Road Network geoprocessing tool, which removes features by feature hierarchy and network connectivity, yet preserves characteristic urban/rural local density patterns that can be lost through simple category removals. The paper describes thinning for label hierarchies within road categories, improved preference in placement for more important road labels, and selective removal of labels through scale. Use of the Radical Law to guide matches between thinning parameters and suitable scales of representation also is shown. Inspection of graphic results of these treatments can help to establish parameters for automated base map design for US topographic mapping. Numéro de notice : A2013-757 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/15230406.2013.799735 En ligne : https://doi.org/10.1080/15230406.2013.799735 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32893
in Cartography and Geographic Information Science > vol 40 n° 4 (September 2013) . - pp 259 - 270[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-2013041 RAB Revue Centre de documentation En réserve L003 Disponible PermalinkPermalinkPermalinkPermalinkvol 26 n° 3 - July 1999 - The State of US Cartography (Bulletin de Cartography and Geographic Information Science) / American congress on surveying and mapping
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