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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

Modeling the potential swath coverage of nadir and off-nadir pointable remote sensing satellite-sensor systems / S. Hodgson in Cartography and Geographic Information Science, vol 35 n° 3 (July 2008)  

Public [article]  inCartography and Geographic Information Science > vol 35 n° 3 (July 2008) . - pp 147 - 156 Titre : Modeling the potential swath coverage of nadir and off-nadir pointable remote sensing satellite-sensor systems Type de document : Article/Communication Auteurs : S. Hodgson, Auteur ; B. Kar, Auteur Année de publication : 2008 Article en page(s) : pp 147 - 156 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] fauchée [Termes IGN] projection azimutale Résumé : (Auteur) Pointable sensor systems onboard many earth resources satellites today, particularly the higher spatial resolution sensors, provide for a near infinite set of collection opportunities. Satellite orbits of these systems are not systematic repetitive tracks. Predicting future collection opportunities requires predicting where the satellite will be and then computing the potential swath coverage from a pointable sensor along these orbits. While each agency or company models its own satellite-sensor systems, few publicly available sources exist for mapping future satellite ground tracks. Evaluating collection opportunities from multiple satellite-sensor systems from different agencies/companies is problematic. The purpose of the research described in this article was to develop a generic approach for modeling future satellite-sensor collection opportunities. In this article, formulae are developed for computing the potential swath coverage, and an algorithm is designed for constructing the potential swath coverage area. The solution to the swath coverage problem is based on spherical trigonometry, a well known map projection (i.e., azimuthal equidistant map projection) used in an unconventional dynamic form, and a satellite orbital propagation model. We demonstrate how the computation of the swath coverage area can be accomplished using a temporal series of re-centered map projections. Copyright CaGISociety Numéro de notice : A2008-289 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1559/152304008784864668 En ligne : https://doi.org/10.1559/152304008784864668 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29282 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-08031	RAB	Revue	Centre de documentation	En réserve L003	Disponible