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Investigation of automatic feature weighting methods (Fisher, Chi-square and Relief-F) for landslide susceptibility mapping / Emrehan Kutlug Sahin in Geocarto international, vol 32 n° 9 (September 2017)  

Public [article]  inGeocarto international > vol 32 n° 9 (September 2017) . - pp 956 - 977 Titre : Investigation of automatic feature weighting methods (Fisher, Chi-square and Relief-F) for landslide susceptibility mapping Type de document : Article/Communication Auteurs : Emrehan Kutlug Sahin, Auteur ; Cengizhan Ipbuker, Auteur ; Taskin Kavzoglu, Auteur Année de publication : 2017 Article en page(s) : pp 956 - 977 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie thématique [Termes IGN] analyse comparative [Termes IGN] cartographie des risques [Termes IGN] distribution de Fisher [Termes IGN] effondrement de terrain [Termes IGN] khi carré [Termes IGN] pondération [Termes IGN] processus de hiérarchisation analytique [Termes IGN] risque naturel [Termes IGN] surveillance géologique [Termes IGN] test de performance [Termes IGN] vulnérabilité Résumé : (Auteur) In landslide susceptibility mapping, factor weights have been usually determined by expert judgements. A novel methodology for weighting landslide causative factors by integrating statistical feature weighting algorithms was proposed. The primary focus of this study is to investigate the effectiveness of automatic feature weighting algorithms, namely Fisher, Chi-square and Relief-F algorithms. Analytic hierarchy process (AHP) method was used as a benchmark method to compare the performances of the weighting algorithms. All weighted factors were tested using factor-weighted overlay method, and quality of these maps was assessed using overall accuracy, area under the ROC curve (AUC) and success rate curve. In addition, Wilcoxon’s signed-rank test was applied to evaluate statistical differences between both estimated overall accuracies and AUCs, respectively. Results showed that the weights determined by feature weighting methods outperformed the conventional AHP method by about 6% and this level of differences was found to be statistically significant. Numéro de notice : A2017-458 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2016.1170892 Date de publication en ligne : 11/04/2016 En ligne : http://dx.doi.org/10.1080/10106049.2016.1170892 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86383 [article]

Equations of the Mayr Projection / Cengizhan Ipbuker 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 157 - 169 Titre : Equations of the Mayr Projection Type de document : Article/Communication Auteurs : Cengizhan Ipbuker, Auteur Année de publication : 2008 Article en page(s) : pp 157 - 169 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] projection équivalente Résumé : (Auteur) In this study, the pseudo-cylindrical projection of Franz Mayr is examined in detail. The computation of one of Mayr’s projection equations depends on the solution of an elliptical integral. It is this characteristic of the projection that most likely contributes to it being the neglected one among the group of the pseudo-cylindrical projections available today. Franz Mayr used the Legendre tables for the elliptical functions E and F and gave the plane coordinates within one-degree latitude intervals on the 90°meridian. The research reported here derives analytical expressions instead of using the elliptical integral and the interpolation between the table values. Four different solutions have been introduced for mapping applications. The distortion quantities are also presented and discussed. Copyright CaGISociety Numéro de notice : A2008-290 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article DOI : 10.1559/152304008784864659 En ligne : https://doi.org/10.1559/152304008784864659 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29283 [article]

Exemplaires(1)

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

Function matching for Soviet-era table-based modified polyconic projections / I. Oztug Bildirici in International journal of geographical information science IJGIS, vol 20 n° 7 (august 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 7 (august 2006) . - pp 769 - 795 Titre : Function matching for Soviet-era table-based modified polyconic projections Type de document : Article/Communication Auteurs : I. Oztug Bildirici, Auteur ; Cengizhan Ipbuker, Auteur ; M. Yanalak, Auteur Année de publication : 2006 Article en page(s) : pp 769 - 795 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] projection polyconique Résumé : (Auteur) Some map projections are defined by table values rather than mathematical equations. The most popular and famous one in this category is the Robinson Projection. The Ginzburg projections, which were developed and used in the former Soviet Union, are among the other table-based world projections. A computational method is required in order to efficiently use these kinds of projections in Geographic Information Systems (GIS) and similar environments. Function matching for projections based on table values can be realized for a numerical forward transformation. Matched functions also allow the calculation of distortions in the projection easily. In this study, polynomials and radial basis functions, such as multiquadric and thin-plate spline functions, are applied to derive an analytical expression from an array of tabular coordinates. The tests are realized on three table-based polyconic projections, the Ginzburg IV, V and VI. The distortion characteristics of table-based projections are sought by using partial derivatives obtained through numerical approximation. The distortion analysis shows that the Ginzburg V has very reasonable distortions. A solution for the inverse transformation of these projections is also provided. With the awareness of such projections, more alternatives in seeking a suitable map projection in world-scale GIS applications can be proposed. Copyright Taylor & Francis Numéro de notice : A2006-294 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article DOI : 10.1080/13658810600711303 En ligne : https://doi.org/10.1080/13658810600711303 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28021 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06071	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06072	RAB	Revue	Centre de documentation	En réserve L003	Disponible

An inverse solution to the Winkel Tripel projection using partial derivatives / Cengizhan Ipbuker in Cartography and Geographic Information Science, vol 29 n° 1 (January 2002)  

Public [article]  inCartography and Geographic Information Science > vol 29 n° 1 (January 2002) . - pp 37 - 42 Titre : An inverse solution to the Winkel Tripel projection using partial derivatives Type de document : Article/Communication Auteurs : Cengizhan Ipbuker, Auteur Année de publication : 2002 Article en page(s) : pp 37 - 42 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] Projection de Winkel-Tripel Résumé : (Auteur) In cartographic applications it is frequently necessary to transform the rectangular coordinates from one projection into another. In this case, one must first calculate the geographical coordinates from the rectangular coordinates of the existing map and then project these new geo-graphical coordinates to the desired projection. This is called an inverse solution. If both of the plane coordinates are functions of the variables longitude and latitude, it may not be easy to derive the geographical coordinates. This paper describes an iterative approach for the inverse solution of the Winkel Tripel projection using partial derivatives. I chose the Winkel Tripel projection because it is commonly used for mapping the whole world. It has a special importance in atlas cartography where it is regarded as a suitable projection with relatively little distortion, distributed more uniformly than many other atlas projections. Numéro de notice : A2002-049 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article DOI : 10.1559/152304002782064619 En ligne : https://doi.org/10.1559/152304002782064619 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21966 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-02011	RAB	Revue	Centre de documentation	En réserve L003	Disponible