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Landscape dynamics of the spread of sudden oak death / M. Kelly in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 10 (October 2002)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 10 (October 2002) . - pp 1001 - 1009 Titre : Landscape dynamics of the spread of sudden oak death Type de document : Article/Communication Auteurs : M. Kelly, Auteur ; Ross K. Meentemeyer, Auteur Année de publication : 2002 Article en page(s) : pp 1001 - 1009 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse de groupement [Termes IGN] Californie (Etats-Unis) [Termes IGN] carte de la végétation [Termes IGN] classification dirigée [Termes IGN] classification non dirigée [Termes IGN] distribution spatiale [Termes IGN] dynamique spatiale [Termes IGN] Fagus (genre) [Termes IGN] forêt [Termes IGN] image ADAR [Termes IGN] image multibande [Termes IGN] indice d'humidité [Termes IGN] maladie phytosanitaire [Termes IGN] modélisation spatiale [Termes IGN] Normalized Difference Vegetation Index [Termes IGN] simulation dynamique Résumé : (Auteur) Sudden Oak Death is caused by a newly discovered virulent pathogen (Phytophthora ramorum) that is killing thousands of native oak trees in California. We present a landscape-scale study on the spatio-temporal dynamics of oak mortality. Second-order spatial point-pattern analysis techniques (Ripley's K) were applied to the distribution of dead tree crowns (derived from high-resolution imagery) in Marin County, California to determine the existence and scale of mortality clustering in two years (2000 and 2001). Both years showed clustering patterns between 100 and 300 m. A classification tree model was developed to predict spatial patterns of risk for oak mortality based on several landscapescale variables. Proximity to forest edge was the most important explanatory factor, followed by topographic moisture index, proximity to trails, abundance of Umbellularia californica, and potential summer solar radiation. This research demonstrates the utility of integrating remotely sensed imagery analysis with geographic information systems and spatial modeling for understanding the dynamics of exotic species invasions. Numéro de notice : A2002-233 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/2002journal/october/2002_oct_1001- [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22147 [article]

Statistical methods to partition effects of quantity and location during comparison of categorical maps at multiple resolutions / Robert Gilmore Pontius in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 10 (October 2002)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 10 (October 2002) . - pp 1041 - 1049 Titre : Statistical methods to partition effects of quantity and location during comparison of categorical maps at multiple resolutions Type de document : Article/Communication Auteurs : Robert Gilmore Pontius, Auteur Année de publication : 2002 Article en page(s) : pp 1041 - 1049 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse comparative [Termes IGN] analyse de données [Termes IGN] classification floue [Termes IGN] Costa Rica [Termes IGN] déboisement [Termes IGN] forêt [Termes IGN] modèle de simulation Résumé : (Auteur) New generalized statistical methods to measure agreement between two maps at multiple-resolutions, where each cell in each map has a multinomial distribution among any number of categories, are presented. This methodology quantifies agreement between any two categorical maps, where either map uses fuzzy or crisp classification. The method measures the agreement at various resolutions by aggregating neighboring cells into an increasingly coarse grid. At each resolution, the method partitions the overall agreement into correct due to chance, correct due to quantity, correct due to location, error due to location, and error due to quantity. In addition, the method computes six statistics that are useful to interpret the differences between maps, and shows how these statistics change with resolution. This technique is particularly useful for characterizing land-cover change and for validating landcover change models. For illustration, this paper applies these theoretical concepts to the validation of a land-use change model for Costa Rica. Numéro de notice : A2002-234 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans En ligne : https://www2.clarku.edu/~rpontius/pontius_2002_pers.pdf Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22148 [article]

Assessment of the urban development plan of Beijing by using a CA-based urban growth model / J. Chen in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 10 (October 2002)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 10 (October 2002) . - pp 1063 - 1071 Titre : Assessment of the urban development plan of Beijing by using a CA-based urban growth model Type de document : Article/Communication Auteurs : J. Chen, Auteur ; P. Gong, Auteur ; C. He, Auteur ; W. Luo, Auteur ; M. Tamura, Auteur ; P. Shi, Auteur Année de publication : 2002 Article en page(s) : pp 1063 - 1071 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] automate cellulaire [Termes IGN] croissance urbaine [Termes IGN] modèle mathématique [Termes IGN] Pékin (Chine) Résumé : (Auteur) We developed a CA-based urban growth simulation model to emulate the city growth before 1997 and simulate possible change scenarios after that. An adaptive Monte-Carlo method was used to automate the calibration of factor weights used in the CA transitional rules. We used one scene of Landsat MSS imagery from 1975 and three scenes of TM imageiy from 1984, 1991, and 1997 to classify the land-use patterns, and we used the results to calibrate the CA model. We applied the model to assess the general urban development plan entitled "disperse polycentric urban development plan" of Beijing City and found that the plan failed to meet its objectives. Numéro de notice : A2002-235 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/2002journal/october/2002_oct_1063- [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22149 [article]