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From LiDAR data to forest representation on multi-scale / Freiderike Schwarzbach in Cartographic journal (the), vol 50 n° 1 (February 2013)
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Titre : From LiDAR data to forest representation on multi-scale Type de document : Article/Communication Auteurs : Freiderike Schwarzbach, Auteur ; Juha Oksasnen, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 33 - 42 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] arbre (flore)
[Termes IGN] carte de la végétation
[Termes IGN] conception cartographique
[Termes IGN] données lidar
[Termes IGN] figuré ponctuel
[Termes IGN] généralisation cartographique
[Termes IGN] orthoimage couleur
[Termes IGN] rédaction cartographique
[Termes IGN] représentation multipleRésumé : (Auteur) The paper describes processing methods for portraying forest areas on maps utilizing point symbols. The forest map design is based on the use of individual tree data, which is detected from airborne laser scanning data and colour-infrared orthophotos. Several generalisation and symbolisation approaches have been tested in order to use the tree data set for cartographic purposes. Our generalisation method differentiates between trees in dense forests and tree structures in open areas, such as isolated trees, tree groups, tree rows and sparsely scattered trees. The tree symbols are integrated visually with the other map content. The results show that the production of attractive and useful maps requires an advanced generalisation method due to the massive amount of tree objects extracted from the laser scanning data as well as a generalisation level and a symbol type for the trees that are carefully chosen according to the map scale. Furthermore, sophisticated visualisation methods are needed for composing the maps. The created maps are part of a project that aims at supporting outdoor activities using multi-scale maps as part of a multi-publishing service. Numéro de notice : A2013-187 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277412Y.0000000015 En ligne : https://doi.org/10.1179/1743277412Y.0000000015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32325
in Cartographic journal (the) > vol 50 n° 1 (February 2013) . - pp 33 - 42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 030-2013011 RAB Revue Centre de documentation En réserve L003 Disponible Ground filtering and vegetation mapping using multi-return terrestrial laser scanning / Francesco Pirotti in ISPRS Journal of photogrammetry and remote sensing, vol 76 (February 2013)
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Titre : Ground filtering and vegetation mapping using multi-return terrestrial laser scanning Type de document : Article/Communication Auteurs : Francesco Pirotti, Auteur ; A. Guarnieri, Auteur ; Antonio Vettore, Auteur Année de publication : 2013 Article en page(s) : pp 56 - 63 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] carte de la végétation
[Termes IGN] classification dirigée
[Termes IGN] densité de la végétation
[Termes IGN] densité des points
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] filtrage de points
[Termes IGN] hauteur de la végétation
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle numérique de terrain
[Termes IGN] télémétrie laser terrestreRésumé : (Auteur) Discriminating laser scanner data points belonging to ground from points above-ground (vegetation or buildings) is a key issue in research. Methods for filtering points into ground and non-ground classes have been widely studied mostly on datasets derived from airborne laser scanners, less so for terrestrial laser scanners. Recent developments in terrestrial laser sensors (longer ranges, faster acquisition and multiple return echoes) has aroused greater interest for surface modelling applications. The downside of TLS is that a typical dataset has high variability in point density, with evident side-effects on processing methods and CPU-time. In this work we use a scan dataset from a sensor which returns multiple target echoes, in this case providing more than 70 million points on our study site. The area presents low, medium and high vegetation, undergrowth with varying density, as well as bare ground with varying morphology (i.e. very steep slopes as well as flat areas). We test an integrated work-flow for defining a terrain and surface model (DTM and DSM) and successively for extracting information on vegetation density and height distribution on such a complex environment. Attention was given to efficiency and speed of processing. The method consists on a first step which subsets the original points to define ground candidates by taking into account the ordinal return number and the amplitude. A custom progressive morphological filter (opening operation) is applied next, on ground candidate points using a multidimensional grid to account for the fallout in point density as a function of distance from scanner. Vegetation density mapping over the area is then estimated using a weighted ratio of point counts in the tri-dimensional space over each cell. The overall result is a pipeline for processing TLS points clouds with minimal user interaction, producing a Digital Terrain Model (DTM), a Digital Surface Model (DSM), a vegetation density map and a derived Canopy Height Model (CHM). These products are of high importance for many applications ranging from forestry to hydrology and geomorphology. Numéro de notice : A2013-092 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.08.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.08.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32230
in ISPRS Journal of photogrammetry and remote sensing > vol 76 (February 2013) . - pp 56 - 63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2013021 RAB Revue Centre de documentation En réserve L003 Disponible Implementation of the 1:10 000 scale for visualisation of environmental changes / Radzym Lawniczack in Cartographic journal (the), vol 50 n° 1 (February 2013)
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Titre : Implementation of the 1:10 000 scale for visualisation of environmental changes Type de document : Article/Communication Auteurs : Radzym Lawniczack, Auteur ; Jaroslaw Kubiak, Auteur Année de publication : 2013 Article en page(s) : pp 82 - 90 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] 1:10.000
[Termes IGN] analyse de données
[Termes IGN] carte thématique
[Termes IGN] changement climatique
[Termes IGN] environnement
[Termes IGN] implémentation (informatique)
[Termes IGN] Pologne
[Termes IGN] représentation des détails topographiques
[Termes IGN] système d'information géographique
[Termes IGN] visualisation cartographiqueRésumé : (Auteur) This paper is an elaboration of the theses proposed in ‘Cartographic presentation of forms and degradation of the natural environment: sozological map on a scale of 1:50 000’ (Lawniczak and Kubiak, 2009), where a sozological map of Poland was presented. The said map contained comprehensive cartographic information on the forms of environmental protection and degradation, made to a scale of 1:50 000. The thematic scope of the map has already been modified twice: in 1997 and in 2005, with the ensuing changes presented in corresponding manuals: Sozological Map on a Scale of 1:50 000, in an Analogue and Digital Form (Chief National Geodesist, 1997) and Technical Guidelines GIS-4. Sozological Map of Poland, Scale of 1:50 000, in an Analogue and Digital Form (2005). Many years’ worth of experience gained since the launch of this cartographic system points out to the need for broadening the presented content and improving the map’s scale. Thus, attempts have been made at rescaling the map to 1:10 000. Increasing the degree of detail is particularly necessary for presenting areas of intensive human activity. In this paper, the authors propose technical and graphical solutions for the 1:10 000 scale Numéro de notice : A2013-191 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277412Y.0000000009 En ligne : https://doi.org/10.1179/1743277412Y.0000000009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32329
in Cartographic journal (the) > vol 50 n° 1 (February 2013) . - pp 82 - 90[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 030-2013011 RAB Revue Centre de documentation En réserve L003 Disponible A multi-scale approach to mapping canopy height / Gordon M. Green in Photogrammetric Engineering & Remote Sensing, PERS, vol 79 n° 2 (February 2013)
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Titre : A multi-scale approach to mapping canopy height Type de document : Article/Communication Auteurs : Gordon M. Green, Auteur ; C. Ahearn, Auteur ; W. Ni-Meister, Auteur Année de publication : 2013 Article en page(s) : pp 185 - 194 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] analyse multiéchelle
[Termes IGN] base de données d'occupation du sol
[Termes IGN] carte de la végétation
[Termes IGN] données altimétriques
[Termes IGN] données ICEsat
[Termes IGN] données laser
[Termes IGN] Etats-Unis
[Termes IGN] fusion de données
[Termes IGN] hauteur de la végétation
[Termes IGN] occupation du sol
[Termes IGN] service web géographiqueRésumé : (Auteur) Mapping vegetation height over large areas presents a problem of scale: height varies with the individual tree or stand, but the resolution of available datasets is too low to characterize this variability sufficiently for many applications. We address this problem by fusing 1 km resolution canopy height data derived from satellite-based laser altimetry with higher-resolution land-cover data, resulting in 30 m resolution estimates of canopy height. These are downscaled further to 1 m resolution by simulating individual trees. A web service architecture is used, which allows processing to occur on demand without preprocessing large datasets. We compared the resulting canopy volumes to reference airborne lidar data from 262 randomly located 1 km2 areas within nine study sites. Results at 30 m resolution show an RMSE of 33 percent of the mean reference volume and an R2 of 0.77; at 1 m the RMSE is 66 percent and the R2 is 0.38. Numéro de notice : A2013-078 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.14358/PERS.79.2.185 En ligne : https://doi.org/10.14358/PERS.79.2.185 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32216
in Photogrammetric Engineering & Remote Sensing, PERS > vol 79 n° 2 (February 2013) . - pp 185 - 194[article]New insights into the concept of orienteering maps / Angel Munoz-Nieto in Cartographic journal (the), vol 50 n° 1 (February 2013)
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Titre : New insights into the concept of orienteering maps Type de document : Article/Communication Auteurs : Angel Munoz-Nieto, Auteur ; Pablo Rodriguez-Gonzalvez, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 91 - 97 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie
[Termes IGN] carte thématique
[Termes IGN] conception cartographique
[Termes IGN] course d'orientation
[Termes IGN] rédaction cartographiqueRésumé : (Auteur) Orienteering is both a mental and physical activity. A compass and maps are the basic tools of orienteering, and orienteering requires specialized maps that have been adapted and standardized to guarantee fair competition. Map-making for orienteering has become a highly specialized cartographic task. This paper aims to answer three main questions: What is an orienteering map (o-map)? How should we categorize o-maps? What are its essential components? The answers to these questions provide insight into the concept and nature of o-maps. By analysing the functions of this type of maps and by searching for similarities and differences between o-maps, topographic maps, and nautical charts, we attempt to comprehensively characterize and conceptualize o-maps to contribute to their improvement. Numéro de notice : A2013-192 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277412Y.0000000006 En ligne : https://doi.org/10.1179/1743277412Y.0000000006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32330
in Cartographic journal (the) > vol 50 n° 1 (February 2013) . - pp 91 - 97[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 030-2013011 RAB Revue Centre de documentation En réserve L003 Disponible Portail cartographique de l'espace Mont-Blanc / D. Beni in Géomatique suisse, vol 111 n° 2 (01/02/2013)
PermalinkR-Pod, essais en forêt dense ivoirienne avec un drone / N. Delley in Géomatique suisse, vol 111 n° 2 (01/02/2013)
PermalinkSpectral angle mapper and object-based classification combined with hyperspectral remote sensing imagery for obtaining land use/cover mapping in a Mediterranean region / George P. Petropoulos in Geocarto international, vol 28 n° 1-2 (February - May 2013)
PermalinkPermalinkAnalyse par télédétection des paysages agraires des villages de Barani, Sampieri et Orodara (Burkina Faso) / Marius Yao (2013)
PermalinkAnamorphose : déformer pour montrer la réalité ? / Cécile Marin in Carto, le monde en cartes, n° 15 (janvier - février 2013)
PermalinkApport du système de navigation GLONASS à la surveillance de l'ionosphère au dessus de l'Europe / Emilie Pelletier (2013)
PermalinkPermalinkCartographie d'un circuit touristique concernant les lieux de fréquentation de la Commedia dell'Arte à Paris dans le 2ème arrondissement et ses environs au XVIIIème [18ème] siècle / Jean-Loup Chatenet (2013)
PermalinkLa cartographie et la géomatique au service de la santé pour la région Ile-de-France / Carlos Garcia (2013)
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