Download Digital Terrain Modelling: Development and Applications in a by Robert Joseph Peckham, Gyozo Jordan PDF

By Robert Joseph Peckham, Gyozo Jordan

This book is the 1st publication at the improvement and alertness of electronic terrain modelling for local making plans and coverage help. it's a compilation of analysis effects via overseas examine teams on the ecu Commission's Joint study Centre, offering medical help to the advance and implementation of european environmental coverage. functions contain the pan-European River and Catchment Database, eu Flood Alert procedure, ecu electronic Soil Database and substitute solar power assets, all mentioned in a GIS framework within the context of the INfrastructure for SPatial info in Europe (INSPIRE). This practice-oriented ebook is usually recommended to working towards environmental modellers and GIS specialists engaged on neighborhood making plans and coverage aid functions.

Show description

Read or Download Digital Terrain Modelling: Development and Applications in a Policy Support Environment PDF

Similar computers books

STACS 2004: 21st Annual Symposium on Theoretical Aspects of Computer Science, Montpellier, France, March 25-27, 2004. Proceedings

This publication constitutes the refereed court cases of the twenty first Annual Symposium on Theoretical features of machine technology, STACS 2004, held in Montpellier, France, in March 2004. The fifty four revised complete papers awarded including invited contributions have been rigorously reviewed and chosen from greater than 2 hundred submissions.

Declarative Agent Languages and Technologies IV: 4th International Workshop, DALT 2006, Hakodate, Japan, May 8, 2006, Selected, Revised and Invited Papers

This ebook constitutes the completely refereed post-proceedings of the 4th overseas Workshop on Declarative Agent Languages and applied sciences, DALT 2006, held in Hakodate, Japan in could 2006 as an linked occasion of AAMAS 2006, the most overseas convention on self reliant brokers and multi-agent platforms.

Languages and Compilers for Parallel Computing: 20th International Workshop, LCPC 2007, Urbana, IL, USA, October 11-13, 2007, Revised Selected Papers

This e-book constitutes the completely refereed post-conference complaints of the twentieth overseas Workshop on Languages and Compilers for Parallel Computing, LCPC 2007, held in Urbana, IL, united states, in October 2007. The 23 revised complete papers offered have been rigorously reviewed and chosen from forty nine submissions.

Bio-inspired Modeling of Cognitive Tasks: Second International Work-Conference on the Interplay Between Natural and Artificial Computation, IWINAC 2007, La Manga del Mar Menor, Spain, June 18-21, 2007, Proceedings, Part I

The 1st of a two-volume set, this publication constitutes the refereed complaints of the second one foreign Work-Conference at the interaction among ordinary and synthetic Computation, IWINAC 2007, held in los angeles Manga del Mar Menor, Spain in June 2007. The 126 revised papers provided are thematically divided into volumes.

Extra resources for Digital Terrain Modelling: Development and Applications in a Policy Support Environment

Sample text

In other words, an inaccurately acquired DEM will produce inaccurate gradient estimations. It is noted however that topographic slope and aspect can be obtained by direct field measurement circumventing the problem of derivative calculations from an inaccurate DEM. LIDAR and RADAR data represent earth surface, therefore these data sources are inaccurate representations of the topographic surface especially in densely vegetated or built-up areas. Thus, some pre-processing is required to obtain topographic elevation before gradient calculations.

Valley line (drainage line) 12. Ridge line (watershed divide). 21 flow boundaries Singular points, inflexion points, valley lines and ridge lines are called ‘surface specific points’ because they are calculated only for certain isolated locations (points and lines). In contrast, elevation, gradient and curvature are calculated for points of areas. In practice, first points of the topographic surface are classified as regular and singular points. Next, singular points are classified into peaks, pits, passes and flats, and are then excluded from further analysis.

Wilson and Gallant (2000) found that aspect estimations are relatively insensitive to DEM resolution. Evans (1980) noted the sensitivity of curvature to grid spacing. Plan curvature was found to be less sensitive to DEM resolution than profile curvature (Wilson and Gallant 2000). In general, terrain attributes measured on different scales should not be compared (Evans 1980). Large pits can also result from insufficient grid spacing that cannot resolve pit outlet elevation and create artificial dams.

Download PDF sample

Rated 4.45 of 5 – based on 10 votes