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Multi-level representation of terrain features on a contour map

Eric Guilbert
2012 Geoinformatica  
with other features at different levels of representation.  ...  The method extracts terrain features and stores them in a feature tree providing a description of the landscape at multiple levels of detail.  ...  The author would also like to acknowledge the Hydrographic and Oceanographic Service of French Navy (SHOM) who provided the bathymetric data.  ... 
doi:10.1007/s10707-012-0153-z fatcat:ycl25sawhbhztkan732vpini2e

GENERALISATION OF SUBMARINE FEATURES ON NAUTICAL CHARTS

E. Guilbert, X. Zhang
2012 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The definitions are introduced in a multi-agent system in order to perform automatic generalisation of a contour set.  ...  On most large scale and middle scale maps, relief is represented by contours and spot heights.  ...  ACKNOWLEDGEMENTS The work presented in this paper is supported by the Research Grants Council of Hong Kong under General Research Fund grant PolyU 5172/08E.  ... 
doi:10.5194/isprsannals-i-2-13-2012 fatcat:onfkerp5kfgz5npcz46b6up2ym

Mapping Disorder: An Exploratory Study [chapter]

David Fairbairn
2014 Lecture Notes in Geoinformation and Cartography  
on point features.  ...  The mapping of disorder requires a serious attempt at developing cartographic symbols and map representations which can optimise the portrayal of multi- dimensional phenomena, such that the complexity  ... 
doi:10.1007/978-3-319-07926-4_2 fatcat:jflubxtrlvfifozqn77qm4me64

Extracting Topographic Terrain Features from Elevation Maps

I Kweon
1994 Computer Vision and Image Understanding  
We develop new definitions for those topographic features based on the contour map.  ...  We build a contour map from an elevation map and generate the connectivity tree of all regions separated by the contours.  ...  The contour tree represents the relationships among contour lines on a contour map. We call this contour tree representation a fopographic change free (TC tree).  ... 
doi:10.1006/cviu.1994.1013 fatcat:ju3ohfmvtjfztcyaj4g6p5hmde

Extracting Topographic Terrain Features from Elevation Maps

I.S. Kweon, T. Kanade
1994 CVGIP: Image Understanding  
We develop new definitions for those topographic features based on the contour map.  ...  We build a contour map from an elevation map and generate the connectivity tree of all regions separated by the contours.  ...  The contour tree represents the relationships among contour lines on a contour map. We call this contour tree representation a fopographic change free (TC tree).  ... 
doi:10.1006/ciun.1994.1011 fatcat:tywx7plkxvbxvoi6w3fynga3ce

A Global Continuous Multi-Scale Terrain Contour Simplification Method Based on the Level Set

Haoyue Qian, Lin Yang, Zejun Zuo, Run Wang, Wenjie Zhen, Shunping Zhou
2021 Applied Sciences  
For the multi-scale representation of contour lines, simplification is a fundamental step in providing different levels of detail for linear features.  ...  CCSM can also effectively balance local and global structures and has potential applications in obtaining a continuous multi-scale representation of terrain contours.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app11093855 doaj:6144792856e8436a9320edb5cd717db4 fatcat:5xg2a5rnzjblhnnyjpv26hwvqa

Feature-Driven Generalization of Isobaths on Nautical Charts: A Multi-Agent System Approach

Eric Guilbert
2015 Transactions on GIS  
A nautical chart provides a schematic view of the seafloor where isobaths (contour lines joining points of same depth) and depth soundings are generalised to highlight undersea features that form navigational  ...  The seafloor is not perceived as a continuous depth field but as a set of discrete features composed by groups of isobaths.  ...  A set of operators were defined at feature level and the generalisation process was coordinated by a multi-agent system.  ... 
doi:10.1111/tgis.12147 fatcat:nkfn4dr46bemdib76sfmama4gm

A Novel Multi-feature Joint Learning Method for Fast Polarimetric SAR Terrain Classification

Junfei Shi, Haiyan Jin, Xiaohua Li
2020 IEEE Access  
Then, a multifeature joint sparse representation model(MF-JSR) is proposed by designing joint sparse constraints on the extracted features above.  ...  The proposed method extract three kinds of low-level features of PolSAR data at first.  ...  Secondly, based on the three types of features, a joint multi-feature sparse representation method is proposed by constructing three sets of codewords.  ... 
doi:10.1109/access.2020.2973246 fatcat:4kbq6g2qqfeb7fnvvvs2kwcfvu

EFFICIENT TECHNIQUE FOR AUTOMATIC EXTRACTION AND IDENTIFICATION OF ELEVATION FROM A REFERENCE IMAGE

Mohan Pratap Pradhan, Mrinal Kanti Ghose, Gourav Mittal
2005 INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY  
digital surface model of a terrain.  ...  In Geographic information system (GIS) identification of elevation detail pertaining to a contour in a reference map or topological map plays an important role while creating digital elevation model or  ...  Segmentation of contour and elevation The contour map pertaining to a terrain consists of several feature, of the set of features most important feature are contour and its elevation.  ... 
doi:10.24297/ijct.v4i1c.3117 fatcat:re4xqmwupjccpo5ip3iz6rzkgi

Topological Landscapes: A Terrain Metaphor for Scientific Data

Gunther Weber, Peer-Timo Bremer, Valerio Pascucci
2007 IEEE Transactions on Visualization and Computer Graphics  
The basic idea is to construct a terrain with the same topology as a given dataset and to display the terrain as an easily understood representation of the actual input data.  ...  In this projection from an n-dimensional scalar function to a two-dimensional (2D) model we preserve function values of critical points, the persistence (function span) of topological features, and one  ...  ACKNOWLEDGEMENTS We would like to thank Hamish Carr and Scott Dillard for making available the code used to compute contour trees and the branch decomposition and Peter Lindstrom for making available the  ... 
doi:10.1109/tvcg.2007.70601 pmid:17968092 fatcat:hdkqvk53ibde5knyzppdqj7og4

A robust three-stage approach to large-scale urban scene recognition

Jinglu Wang, Yonghua Lu, Jingbo Liu, Long Quan
2017 Science China Information Sciences  
First, we develop a joint semantic labeling method to obtain a semantic labeling of the triangular mesh-based representation by exploiting both image features and geometric features.  ...  To obtain the ultimate high-level description of urban scenes, we propose a three-stage approach to recognizing the 3D reconstructed scene with efficient representations.  ...  Conflict of interest The authors declare that they have no conflict of interest. Supporting information The supporting information is available online at info.scichina.com and link.springer. com.  ... 
doi:10.1007/s11432-017-9178-8 fatcat:cs7viahb3rbghhdh7mrbj2ml7e

Terrain Generalization with Multi-scale Pyramids Constrained by Curvature

Bernhard Jenny, Helen Jenny, Lorenz Hurni
2011 Cartography and Geographic Information Science  
The level of generalization can be adjusted seamlessly from the foreground to the background of the 3D map.  ...  This is relevant for 3D maps in central perspective projection considerably compressing distant terrain features.  ...  We neglect the generalization of representations (such as contour lines) derived from terrain models.  ... 
doi:10.1559/15230406382110 fatcat:m6vqfdcnyvhulc2kzcpfg6wpti

Scientific visualization of landscapes and landforms

Helena Mitasova, Russell S. Harmon, Katherine J. Weaver, Nathan J. Lyons, Margery F. Overton
2012 Geomorphology  
gaining recognition as a powerful tool for analyzing landscape structure based on multiple return Light Detection and Ranging (LiDAR) data.  ...  SECURITY CLASSIFICATION OF: Scientific visualization of geospatial data provides highly effective tools for analysis and communication of information about the land surface and its features, properties  ...  Engineers, North Carolina Floodplain Mapping Program and the National Oceanic and Atmospheric Administration Coastal Services Center.  ... 
doi:10.1016/j.geomorph.2010.09.033 fatcat:r342xw4wtnh63ofe44vbb43bei

Differential Digital Terrain Model Applied to Evaluate Changes in the Relief Features

IZABELA PIECH, LITWIN URSZULA
2007 Romanian Review of Regional Studies  
Under this research study, on the example of a village of Kasinka Mała, a possibility of applying a Digital Terrain Model (DTM) to evaluate changes in the cultural landscape was assessed.  ...  This type of representation of the terrain configuration and relief features is typical when using cartographic methods.  ...  A very important element of such map is that contour lines are very well drawn.  ... 
doaj:f2173e4dfe8d41eaaa197cf2767b40eb fatcat:loduzfot7nczzlfj5bsj2v27oe

Review and critical analysis on digital elevation models

Subbu Esakkipandian Lakshmi, Kiran Yarrakula
2019 Geofizika  
river channel and creating contour maps to extract the elevation and so on.  ...  To understand and analyze the nature of the terrain, DEM is required in many fields in the improvement of developing the product and decision making, mapping purpose, preparing 3D simulations, estimating  ...  Due to its low metric quality, people start preferring contoured topographical maps in which all the features present in the terrain are projected orthogonally on to a two-dimensional horizontal datum.  ... 
doi:10.15233/gfz.2018.35.7 fatcat:x4r2xk6nzncq3jkeiyu3bu5fq4
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