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Assessment of regression kriging for spatial interpolation: comparisons of seven GIS interpolation methods / Qingmin Meng in Cartography and Geographic Information Science, vol 40 n° 1 (January 2013)
[article]
Titre : Assessment of regression kriging for spatial interpolation: comparisons of seven GIS interpolation methods Type de document : Article/Communication Auteurs : Qingmin Meng, Auteur ; Zhijun Liu, Auteur ; Bruce E. Borders, Auteur Année de publication : 2013 Article en page(s) : pp 28 - 39 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] analyse comparative
[Termes IGN] interpolation spatiale
[Termes IGN] krigeage
[Termes IGN] lissage de données
[Termes IGN] régression
[Termes IGN] système d'information géographiqueRésumé : (Auteur) As an important GIS function, spatial interpolation is one of the most often used geographic techniques for spatial query, spatial data visualization, and spatial decision-making processes in GIS and environmental science. However, less attention has been paid on the comparisons of available spatial interpolation methods, although a number of GIS models including inverse distance weighting, spline, radial basis functions, and the typical geostatistical models (i.e. ordinary kriging, universal kriging, and cokriging) are already incorporated in GIS software packages. In this research, the conceptual and methodological aspects of regression kriging and GIS built-in interpolation models and their interpolation performance are compared and evaluated. Regression kriging is the combination of multivariate regression and kriging. It takes into consideration the spatial autocorrelation of the variable of interest, the correlation between the variable of interest and auxiliary variables (e.g., remotely sensed images are often relatively easy to obtain as auxiliary variables), and the unbiased spatial estimation with minimized variance. To assess the efficiency of regression kriging and the difference between stochastic and deterministic interpolation methods, three case studies with strong, medium, and weak correlation between the response and auxiliary variables are compared to assess interpolation performances. Results indicate that regression kriging has the potential to significantly improve spatial prediction accuracy even when using a weakly correlated auxiliary variable. Numéro de notice : A2013-741 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/15230406.2013.762138 En ligne : https://doi.org/10.1080/15230406.2013.762138 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32877
in Cartography and Geographic Information Science > vol 40 n° 1 (January 2013) . - pp 28 - 39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 032-2013011 RAB Revue Centre de documentation En réserve L003 Disponible Street-level spatial interpolation using network-based IDW and ordinary kriging / N. Shiode in Transactions in GIS, vol 15 n° 4 (August 2011)
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Titre : Street-level spatial interpolation using network-based IDW and ordinary kriging Type de document : Article/Communication Auteurs : N. Shiode, Auteur ; S. Shiode, Auteur Année de publication : 2011 Article en page(s) : pp 457 - 477 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] interpolation inversement proportionnelle à la distance
[Termes IGN] interpolation spatiale
[Termes IGN] krigeage
[Termes IGN] lissage de données
[Termes IGN] réseau routierRésumé : (Auteur) This study proposes network-based spatial interpolation methods to help predict unknown spatial values along networks more accurately. It expands on two of the commonly used spatial interpolation methods, IDW (inverse distance weighting) and OK (ordinary kriging), and applies them to analyze spatial data observed on a network. The study first provides the methodological framework, and it then examines the validity of the proposed methods by cross-validating elevations from two contrasting patterns of street network and comparing the MSEs (Mean Squared Errors) of the predicted values measured with the two proposed network-based methods and their conventional counterparts. The study suggests that both network-based IDW and network-based OK are generally more accurate than their existing counterparts, with network-based OK constantly outperforming the other methods. The network-based methods also turn out to be more sensitive to the edge effect, and their performance improves after edge correction. Furthermore, the MSEs of standard OK and network-based OK improve as more sample locations are used, whereas those of standard IDW and network-based IDW remain stable regardless of the number of sample locations. The two network-based methods use a similar set of sample locations, and their performance is inherently affected by the difference in their weight distribution among sample locations. Numéro de notice : A2011-346 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2011.01278.x Date de publication en ligne : 16/08/2011 En ligne : https://doi.org/10.1111/j.1467-9671.2011.01278.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31125
in Transactions in GIS > vol 15 n° 4 (August 2011) . - pp 457 - 477[article]Doppler-aided positioning: Improving single-frequency in the urban environment / M. Bahrami in GPS world, vol 22 n° 5 (May 2011)
[article]
Titre : Doppler-aided positioning: Improving single-frequency in the urban environment Type de document : Article/Communication Auteurs : M. Bahrami, Auteur ; Marek Ziebart, Auteur Année de publication : 2011 Article en page(s) : pp 47 - 56 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] données Doppler
[Termes IGN] effet Doppler
[Termes IGN] géonavigateur
[Termes IGN] lissage de données
[Termes IGN] mesurage de pseudo-distance
[Termes IGN] milieu urbain
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] récepteur monofréquenceRésumé : (Editeur) What do a GPS receiver, a policeman’s speed gun, a weather radar, and some medical diagnostic equipment have in common? Give up? They all make use of the Doppler effect. First proposed in 1842 by the Austrian mathematician and physicist, Christian Doppler, it is the change in the perceived frequency of a wave when the transmitter and the receiver are in relative motion. Doppler introduced the concept in an attempt to explain the shift in the color of light from certain binary stars. Three years later, the effect was tested for sound waves by the Dutch scientist Christophorus Buys Ballot. [...] The beginning of the space age heralded a new application of the Doppler effect. By measuring the shift in the received frequency of the radio beacon signals transmitted by Sputnik 1 from a known location, scientists were able to determine the orbit of the satellite. And shortly thereafter, they determined that if the orbit of a satellite was known, then the position of a receiver could be determined from the shift. That realization led to the development of the United States Navy Navigation Satellite System, commonly known as Transit, with the first satellite being launched in 1961. Initially classified, the system was made available to civilians in 1967 and was widely used for navigation and precise positioning until it was shut down in 1996. The Soviet Union developed a similar system called Tsikada and a special military version called Parus. These systems are also assumed to be no longer in use — at least for navigation. GPS and other global navigation satellite systems use the Doppler shift of the received carrier frequencies to determine the velocity of a moving receiver. Doppler-derived velocity is far more accurate than that obtained by simply differencing two position estimates. But GPS Doppler measurements can be used in other ways, too. In this month’s column, we look at how Doppler measurements can be used to smooth noisy code-based pseudoranges to improve the precision of autonomous positioning as well as to improve the availability of single-frequency real-time kinematic positioning, especially in urban environments. Numéro de notice : A2011-180 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30958
in GPS world > vol 22 n° 5 (May 2011) . - pp 47 - 56[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2011051 RAB Revue Centre de documentation En réserve L003 Disponible Image fusion by spatially adaptive filtering using downscaling cokriging / E. Pardo-Iguzquiza in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 3 (May - June 2011)
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Titre : Image fusion by spatially adaptive filtering using downscaling cokriging Type de document : Article/Communication Auteurs : E. Pardo-Iguzquiza, Auteur ; V. Rodriguez-Galiano, Auteur ; V. Chica-Olmo, Auteur ; P. Atkinson, Auteur Année de publication : 2011 Article en page(s) : pp 337 - 346 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] filtrage numérique d'image
[Termes IGN] fusion d'images
[Termes IGN] image Landsat-TM
[Termes IGN] interpolation non-linéaire
[Termes IGN] krigeage
[Termes IGN] lissage de données
[Termes IGN] qualité géométrique (image)Résumé : (Auteur) The aim of this paper was to extend the method of downscaling cokriging for image fusion by making the method spatially adaptive in that the filter parameters (cokriging weights) can change across the image. The method can adapt itself to the usual statistical non-homogeneity (spatially variable mean, variance and correlation length) of a satellite sensor image that covers an area with different spatial patterns of geographical objects or different terrain types. The solution adopted was to estimate the models of covariances and cross-covariances (or semivariograms and cross-semivariograms) by the same procedure as described in Pardo-Iguzquiza et al. (2006) but with the method applied locally instead of globally. The correct implementation of this local estimation is the key for computational feasibility and prediction efficiency. Two parameters to be taken into account are the grid of locations on which a moving window is centred (local modelling is performed inside this window) and the size of this moving window. With respect to the latter parameter, there is a trade-off between a size small enough to make the procedure locally adaptive and large enough to produce reliable statistical estimates. The computational burden will impose limits to the distance between grid points on which the local moving window is centred. A case study with Landsat ETM+ images was used to show the implementation of the method and the result was evaluated using several statistics widely used for assessing the quality of a fused image, apart from its visual appearance. Numéro de notice : A2011-116 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2011.01.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2011.01.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30896
in ISPRS Journal of photogrammetry and remote sensing > vol 66 n° 3 (May - June 2011) . - pp 337 - 346[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2011031 SL Revue Centre de documentation Revues en salle Disponible
Titre : Variable-scale Geo-information Type de document : Thèse/HDR Auteurs : Martijn Meijers, Auteur Editeur : Delft [Pays-Bas] : Delft University of Technology Année de publication : 2011 Importance : 235 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-90-6132-335-8 Note générale : Bibliographie
PhD thesis Delft University of TechnologyLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] données localisées 2D
[Termes IGN] données multiéchelles
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] lissage de données
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] représentation multiple
[Termes IGN] structure de données localisées
[Termes IGN] variation d'échelleNote de contenu : 1 Setting the scene
1.1 Motivation for maps at variable scale
1.2 Objective and Research questions
1.3 Research scope
1.4 Methodology
1.5 Thesis outline
2 Research background
2.1 Modelling digital geographic space
2.2 From single-scale to multi-scale maps
2.3 Multi-scale hierarchies
2.4 Vario-scale structures
2.5 Progressive data transfer
2.6 Starting points for data at variable scale
3 Formalising valid vario-scale data
3.1 A preference for minimal redundancy
3.2 Formalisation of variable-scale partitions
3.3 Validation (and repair) of a 2d input partition
3.4 Closing remarks
4 Improving variable-scale data structures
4.1 Minimally redundant data storage
4.2 Simultaneous, topologically-safe line simplification
4.3 Collapsing areas: splitting over multiple neighbours
4.4 Closing remarks
5 Improving vario-scale data dissemination
5.1 Quantitative importance-setting approach
5.2 2d map for a thin client
5.3 Progressive data streaming
5.4 A cache-friendly and stateful solution
5.5 Closing remarks
6 A new era: smooth vario-scale data
6.1 Lessons learnt: a synthesis
6.2 Smooth data for the space-scale cube
6.3 Exploring possible drawbacks
6.4 Closing remarks
7 Conclusions and Future work
7.1 Conclusions
7.2 Recommendations for further researchNuméro de notice : 14464 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Thèse étrangère Note de thèse : Thèse de doctorat : : Pays-Bas, Delft : 2011 DOI : sans En ligne : https://www.ncgeo.nl/index.php/en/publicatiesgb/publications-on-geodesy/item/257 [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=45252 A DEM generalization by minor valley branch detection and grid filling / Tinghua Ai in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 2 (March - April 2010)PermalinkSpatial interpolation in wireless sensor networks: localized algorithms for variogram modeling and kriging / M. Umer in Geoinformatica, vol 14 n° 1 (January 2010)PermalinkEfficient multiresolution spatial predictions for large data arrays / Magnussen, Steen in Remote sensing of environment, vol 109 n° 4 (30 August 2007)PermalinkBuilding boundary tracing and regularization from airborne lidar point clouds / A. Sampath in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 7 (July 2007)PermalinkA multi-resolution approach for filtering LiDAR altimetry data / José L. Silvan-Cardenas in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 1 (October 2006)PermalinkDeriving ground surface digital elevation models from Lidar data with geostatistics / C.D. Lloyd in International journal of geographical information science IJGIS, vol 20 n° 5 (may 2006)PermalinkConsideration of smoothing techniques for hyperspectral remote sensing / C. Vaiphasa in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 2 (April 2006)PermalinkUncertainty analysis for soil-terrain models / T.F.A. Bishop in International journal of geographical information science IJGIS, vol 20 n° 2 (february 2006)PermalinkAnalyse et traitement des images numériques / Philippe Destuynder (2006)PermalinkAutomatic reconstruction of industrial installations using point clouds and images / Tahir Rabbani Shah (2006)PermalinkPermalinkCritical point detection using the length ration (LR) for line generalization / Byron Nakos in Cartographica, vol 40 n° 3 (September 2005)PermalinkGWR, MAUP et lissage par potentiels / Laure Charleux in Revue internationale de géomatique, vol 15 n° 2 (juin – août 2005)PermalinkA subdivision algorithm for smooth 3D terrain models / Norbert Pfeifer in ISPRS Journal of photogrammetry and remote sensing, vol 59 n° 3 (May 2005)PermalinkA vector-GIS extension for generalization of binary polygon patterns / H. Millward in Cartographica, vol 39 n° 4 (December 2004)PermalinkEstimation of the positional uncertainty in line simplification in GIS / C.K. Cheung in Cartographic journal (the), vol 41 n° 1 (June 2004)PermalinkSmoothing vegetation spectra with wavelets / K.S. Schmidt in International Journal of Remote Sensing IJRS, vol 25 n° 6 (March 2004)PermalinkImproving tropical forest mapping using multi-date Landsat TM data and pre-classification image smoothing / C. Tottrup in International Journal of Remote Sensing IJRS, vol 25 n° 4 (February 2004)PermalinkModellierung von Oberflächen mit Diskontinuitäten / Andrzej Borkowski (2004)PermalinkThe potential of virtual reality technology for analysis of remotely sensed data: a Lidar case study / T. Warner in Geocarto international, vol 18 n° 1 (March - May 2003)Permalink