The paper presents the concept of digital geomorphology, situated on the boundary between geomorphology and geomatics. The digital geomorphology is characterized by: utilization of digitalterrain data, use of modern measurement technologies
in the fieldwork, utilization of the main GIS functions in the analysis of geographical data and geostatistical methods in the construction of the digital geomorphological model (DGM). The digital geomorphology opens new investigative research fields, which
Suchi chikei moderu no tokeiteki bunseki ni yoru Shikoku jima no chikei tokusei (Caractéristiques du relief dans Shikoku d'après l'analyse statistique selon DigitalTerrainModel )
Analyse statistique ; Géographie de l'Asie ; Géomorphométrie ; Japon ; Modèle DTM ; Relief ; Shikoku
L'analyse statistique à l'aide de DigitalTerrainModel permet l'expression quantitative du relief de Shikoku. - (SGA)
The production of digital elevation models for experimental model landscapes
Bassin-versant ; Erosion des sols ; Etude comparée ; Expérimentation ; Géomorphologie ; Modèle ; Modèle numérique de terrain ; Photogrammétrie ; Simulation de pluie
Comparative study ; Digital elevation model ; Experimentation ; Geomorphology ; Model ; Photogrammetry ; Rainfall simulation ; Soil erosion ; Watershed
Automated digital photogrammetry was used to produce digital elevation models of experimental model landscapes under controlled laboratory conditions as part of a series of rainfall erosion experiments looking at the evolution of landforms
in response to erosion. The method allowed the elevations of the experimental landscapes to be studied in great detail on a regular grid digitalterrain map. Digital photogrammetry produced elevation data at a resolution of 6 mm with a standard deviation
Bibliography ; Digital elevation model ; Error ; Methodology ; Model ; Physical geography ; Typology
This paper reviews research on the understanding, modelling and propagation of error in DEMs, with the aim of presenting a comprehensive statement of the issues surrounding these topics : sources of error in DEMs, error models, error propagation
Main features of geomorphology of the Sudetes re-assessed in the light of digital elevation model
Géomorphologie ; Modèle numérique de terrain ; Montagne ; Sudety ; Tchèque république ; Tectonique
Czech Republic ; Digital elevation model ; Geomorphology ; Mountain ; Sudety ; Tectonics
The Sudetes as a geomorphological region are distinguished by complicated spatial pattern of high- and low-altitude terrains and variable mean slope gradients across the range. An analysis of a digital elevation model and maps derived from the model
A digitalterrainmodel for large surfaces and direct storage access
Banque de données ; Cartographie automatique ; Donnée ; Généralités sur la géographie ; Interpolation ; Modèle numérique ; Pente ; Technique cartographique ; Topographie
Il s'agit d'un modèle de terrain construit sur une grille de points équidistants, avec interpolation non linéaire, et un stockage simultané des valeurs, y compris celles d'altitude et de pente. (MTG).
This article presents a review of the combined analysis of digitalterrainmodels (DTMs) and remotely sensed data in landscape investigations. The utilization of remotely sensed data with DTMs has become an important trend in geomatics in the past
Bathymetry ; Catalonia ; Digital elevation model ; Flood ; Gerona ; Global Positioning System ; Model ; Roughness ; Spain ; Stream ; Topography
The effects of the topographic data source and resolution on the hydraulic modelling of floods were analysed. Seven digitalterrainmodels (DTMs) were generated from three different altimetric sources : a global positioning system (GPS) survey
and bathymetry; high-resolution laser altimetry data LiDAR (light detection and ranging); and vectorial cartography (1:5000). Selection criteria were established for the different topographic models in order to assess their generation and treatment in relation
to the time-cost ratio for each methodology. the hydraulic modelling was carried out on a 2 km reach of the Ted River near Sant Juliá de Ramis near Girona in NE Spain.
Systematic selection of very important points (VIP) from digitalterrainmodel (DTM) for constructing triangular irregular networks (TIN) in Geographic information system development in China.
Chine ; Généralités sur la géographie ; Modèle numérique de terrain ; Système d'information géographique ; Topographie ; Triangulation
Estimation of regional material yield from coastal landslides based on historical digitalterrainmodelling
Bilan sédimentaire ; California ; Etats-Unis ; Glissement de terrain ; Lithologie ; Littoral ; Modèle numérique de terrain ; Photogrammétrie ; Système d'information géographique
California ; Coastal environment ; Digital elevation model ; Geographical information system ; Landslide ; Lithology ; Photogrammetry ; Sediment budget ; United States of America
High-resolution historical (1942) and recent (1994) digitalterrainmodels were derived from aerial photographs along the Big Sur coastline in central California to measure the long-term volume of material that enters the nearshore environment
Mapping contemporary magnetic mineral concentrations in peat soils using fine-resolution digitalterrain data
Cartographie ; England ; Modèle numérique de terrain ; Propriétés du sol ; Ravinement ; Royaume-Uni ; Sol hydromorphe ; Susceptibilité magnétique ; Topographie ; Tourbière ; Yorkshire
Cartography ; Digital elevation model ; England ; Gully erosion ; Hydromorphic soil ; Magnetic susceptibility ; Peat bog ; Soil properties ; Topography ; United Kingdom ; Yorkshire
Recent adavances in the field od digitalterrain analysis and the avaibility of fine-resolution digital elevation models means that the relationship between the concentration of magnetic minerals in peat soils and topography can be explored using
Channel head location and characteristics using digital elevation models
Australie ; Bassin-versant ; Distribution spatiale ; Hydrologie ; Modèle numérique de terrain ; Northern Territory ; Pente de versant ; Réseau de drainage
Australia ; Digital elevation model ; Drainage network ; Hydrology ; Northern Territory ; Slope gradient ; Spatial distribution ; Watershed
extent channel head location can be predicted by the area-slope relationship and the cumulative area distribution. The effect of digital elevation model grid resolution on the ability to locate channel head position and assess hillslope length will also
Geomorphometric mapping of Asia Minor from GLOBE digital elevation model
Analyse des groupes ; Anatolie ; Asie ; Asie du Sud-Est ; Cartographie ; Géomorphométrie ; Modèle numérique de terrain ; Montagne ; Pénéplaine ; Turquie
Anatolia ; Asia ; Cartography ; Cluster analysis ; Digital elevation model ; Geomorphometry ; Mountain ; Peneplain ; South-Eastern Asia ; Turkey
This paper focuses on the mapping of landscapes in Asia Minor on the basis of the moderate resolution digital elevation model GLOBE that provides a regional relief representation. Finally, the classification identifies 2 branches. In between
Relict shorelines and ice flow patterns of the northern Puget Lowland from lidar data and digitalterrainmodelling
British Columbia ; Canada ; Datation C 14 ; Etats-Unis ; Glaciaire ; Glacio-isostasie ; Modèle numérique de terrain ; Mouvement vertical ; Niveau marin ; Paléo-environnement ; Quaternaire ; Télédétection ; Washington State
British Columbia ; C 14 dating ; Canada ; Digital elevation model ; Glacial features ; Glacial isostasy ; Palaeo-environment ; Quaternary ; Remote sensing ; Sea level ; United States of America ; Vertical movement ; Washington State
The aim of this paper is to show how digitalterrainmodelling using high-resolution lidar (Light Detection And Ranging) data of Whidbey and Camano islands, combined with an understanding of process-form relations can be used to provide information
Automated identification of yatsu valleys based on a semantic modeling of landforms using digital elevation models
Algorithme ; Classification ; Géomorphologie ; Honshū ; Japon ; Modèle numérique de terrain ; Modélisation ; Pente de versant ; Topographie ; Topologie ; Vallée
Algorithm ; Classification ; Digital elevation model ; Geomorphology ; Honshu ; Japan ; Modelling ; Slope gradient ; Topography ; Topology ; Valley
The aim of this study is to develop algorithms for identifying Yatsu valleys by topological measurements based on the semantic modeling of landforms using a DEM. Yatsu valleys are valleys with flat floors dissecting into the uplands and hills
Evaluation on the accuracy of digital elevation models
Chine ; Concept ; Erreur ; Modèle ; Modèle numérique de terrain ; Méthode des moindres carrés ; Méthodologie ; Rugosité ; Système d'information géographique
China ; Concept ; Error ; Geographical information system ; Least squares method ; Methodology ; Model ; Roughness
There is a growing interest in investigating the accuracy of digital elevation model (DEM). However people usually emphasize DEM sampling errors, but ignore the impact of DEM resolution and terrain roughness on the accuracy of terrain representation
. This research puts forward the concept of DEM terrain representation error (Et). A multi-resolution and multi-relief comparative approach is used as the major methodology in this research. The experiment reveals a quantitative relationship between the error
and the variation of resolution and terrain roughness at a global level. Root mean square error (RMS Et) is regressed against surface profile curvature (V) and DEM resolution (R) at 10 resolution levels.
cartographie par ordinateur et des modèles de terrain numériques pour la réalisation de cartes géomorphologiques)
Cartographie ; Cartographie automatique ; Cartographie géomorphologique ; Généralités sur la géographie ; Modèle numérique
A program package (COREA) was developed, which computes a DigitalTerrainModel (grid-DTM) from digitized contour lines, spot elevations and breaklines. From the DTM a Digital Slope Model and a Digital Curvature Model is derived. A comparison