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A process oriented areal interpolation technique: a coastal county example / B. Kar in Cartography and Geographic Information Science, vol 39 n° 1 (January 2012)  

Public [article]  inCartography and Geographic Information Science > vol 39 n° 1 (January 2012) . - pp 3 - 16 Titre : A process oriented areal interpolation technique: a coastal county example Type de document : Article/Communication Auteurs : B. Kar, Auteur ; M. Hodgson, Auteur Année de publication : 2012 Article en page(s) : pp 3 - 16 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rédaction cartographique [Termes IGN] figuration de la densité [Termes IGN] interpolation par pondération de zones [Termes IGN] Miami Résumé : (Auteur) The Modifiable Areal Unit Problem (MAUP) is the classic term for describing different totals observed from spatially different aggregation units. In a typical analytical problem (e.g. estimating total population within a watershed from census unit totals) the spatial distribution of populations within the census units arc modeled. To minimize MAUP errors, areal interpolation techniques arc used to model such sub-unit population distributions. Areal interpolation techniques are highly dependent on ancillary data (e.g. land use/cover data) and typically do not include "intelligent" relations about where people choose to live, other than a weighted association between nominal land cover/use and population density. The purpose of this research was to design and implement an "intelligent" areal interpolation method for housing data in coastal environments, validate the accuracy, and compare to other techniques. This study was conducted for Miami-Dade County in Florida at census scales from county to block. Parcel boundary data was used as a reference layer to validate each technique. Not surprisingly, all techniques perform best at finer spatial resolutions (e.g. block level) with error increasing at coarser resolutions. The accuracy of the dasymetric technique is directly related to the accuracy of ancillary data. The new intelligent technique, (referred to as the process-oriented technique from here onwards) models the relationship between housing unit density distribution and proximity to the coast. This process-oriented technique performed better than the arcal weighting and the dasymetric mapping technique. Combining the 'process-oriented' technique with a dasymetric technique provided the least amount of error. Numéro de notice : A2012-293 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304063913 En ligne : https://doi.org/10.1559/152304063913 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31739 [article]

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032-2012011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Automated dot mapping: how to dot the dot map / A. Hey in Cartography and Geographic Information Science, vol 39 n° 1 (January 2012)  

Public [article]  inCartography and Geographic Information Science > vol 39 n° 1 (January 2012) . - pp 17 - 29 Titre : Automated dot mapping: how to dot the dot map Type de document : Article/Communication Auteurs : A. Hey, Auteur Année de publication : 2012 Article en page(s) : pp 17 - 29 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rédaction cartographique [Termes IGN] carte de répartition par points [Termes IGN] cartographie automatique [Termes IGN] représentation cartographique Résumé : (Auteur) Dot mapping is a cartographic representation method to visualize quantitative absolute values, e.g. population figures, and spatial distribution patterns. In the course of the development of computer-assisted cartography many cartographic methods have already been implemented in computer algorithms, but for dot mapping only a few solutions with some considerable constraints have been found until now. The most important constraint is the lack of repeatable results because these solutions work with random dot placement. This may result in different maps, where the only real difference is the date of production, not the data that is mapped. Another constraint is the overlap of dots which may interfere with the user's intention to count the dots. Although, this last constraint may not be considered important by all, the first constraint is clearly problematic for the cartographer. This paper deals with the automated production of dot distribution maps which will not suffer from the above named constraints. The paper focuses on the placement of dots, ft presents a method of placing dots in a centred manner as dot clusters grouping around one central point, c.gi the centroid of an enumeration area. The geometric basis is a spiral whirl. Besides the regular basis, the dot clusters should not be perceived as strict geometric figures and a pseudo-random clement is therefore introduced to blur the symmetry of the dot clusters. Although, this blurring is apparently random, it is repeatable. The new approach is a first step to produce dot maps automatically by providing a mathematical structure to connect the area needed for placing the dots with the number and size of the dots. The method is meant to support cartographic laypersons as well as professional cartographers in the process of map design. Numéro de notice : A2012-294 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/1523040639117 En ligne : https://doi.org/10.1559/1523040639117 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31740 [article]

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032-2012011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Retracing the past: recovering 19th century benchmarks to measure shoreline change along the outer shore of Cape Cod, Massachusetts / S. Mague in Cartography and Geographic Information Science, vol 39 n° 1 (January 2012)  

Public [article]  inCartography and Geographic Information Science > vol 39 n° 1 (January 2012) . - pp 30 - 47 Titre : Retracing the past: recovering 19th century benchmarks to measure shoreline change along the outer shore of Cape Cod, Massachusetts Type de document : Article/Communication Auteurs : S. Mague, Auteur Année de publication : 2012 Article en page(s) : pp 30 - 47 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse diachronique [Termes IGN] dix-neuvième siècle [Termes IGN] littoral [Termes IGN] Massachusetts (Etats-Unis) [Termes IGN] North American Datum 1983 [Termes IGN] North American Vertical Datum 1988 [Termes IGN] trait de côte Résumé : (Auteur) Between 1887 and 1888, Henry L. Marindin, Assistant Topographer of the U.S. Coast & Geodetic Survey, conducted a detailed survey of the outer shores of Cape Cod, Massachusetts, providing an important base line for future comparisons, "which will he of value to geologists and others who study the changes in the coast-line". In 2007, the Land-Sea Interaction Program of the Provincetown Center for Coastal Studies began a project to resurvey Marindin's profiles and cross-sections to quantify changes to landforms and the nearshore environment that have occurred over the past century for use in estimating future conditions in the context of climate change and sea level rise. In order to facilitate reliable, quantitative shoreline comparisons, the translation of historical spatial data to contemporary horizontal (e.g., NAD83) and vertical (e.g., NAVD88) reference systems is paramount. With historical transects translated to NAD83 using methods developed as part of a previous study, the goal of this work is to develop an accurate estimate of the relationship between Marindin's elevation data and NAVD88. Recognizing that the physical and social landscape had changed significantly over the past 120+ years, a historical base map was prepared to assist with the recovery of 19th century benchmarks. Using the base map, five Coast survey benchmarks were recovered and resurveyed. Based on the results of this work, the local mean sea level datum of Marindin's survey is estimated to be 1.13 feet (0.34 meters) below the NAVD88 plane of reference. Numéro de notice : A2012-295 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/1523040639130 En ligne : https://doi.org/10.1559/1523040639130 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31741 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2012011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Using eye-tracking and mouse metrics to test usability of web mapping navigation / S. Manson in Cartography and Geographic Information Science, vol 39 n° 1 (January 2012)  

Public [article]  inCartography and Geographic Information Science > vol 39 n° 1 (January 2012) . - pp 48 - 60 Titre : Using eye-tracking and mouse metrics to test usability of web mapping navigation Type de document : Article/Communication Auteurs : S. Manson, Auteur ; L. Kne, Auteur ; K. Dyke, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 48 - 60 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] convivialité [Termes IGN] évaluation [Termes IGN] interface web [Termes IGN] oculométrie [Termes IGN] web mapping Résumé : (Auteur) The growth of web-based mapping is transforming geovisualization. Use of web mapping has become ubiquitous throughout much of the world and has sparked greater public interest in G1S and mapping. Despite the rapid growth of web mapping, there has been relatively little study of the design and usability of web maps. Moreover, the design and function of popular web mapping programs are sometimes at odds with standard GIS and cartographic practices for even the simplest of functions such as zooming into a feature of interest. This study advances understanding of web mapping design via web usability testing based on mouse metrics and eye tracking technology to assess the utility of four different web map navigation schemes: pan zoom; double clicking; zoom by rectangle; and wheel zoom. We (bund significant differences among the various interfaces, with marked preference for the standard GIS approach of rectangle zoom, followed closely by wheel zoom. Far fewer users preferred the web mapping standard of pan zoom or click zoom. In addition to finding significant differences in usability among these approaches, this work illustrates the broader utility of usability testing and eye tracking technology for creating a better web mapping experience for users. Numéro de notice : A2012-296 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/1523040639148 En ligne : https://doi.org/10.1559/1523040639148 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31742 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2012011	RAB	Revue	Centre de documentation	En réserve L003	Disponible