By Qiming Zhou, Brian Lees, Guo-an Tang
Terrain research has been an energetic learn box for years and attracted study reviews from geographers, surveyors, engineers and machine scientists. With the fast progress of Geographical details process (GIS) know-how, rather the institution of excessive solution electronic Elevation versions (DEM) at nationwide point, the problem is now desirous about offering justifiable socio-economical and environmental advantages. The contributions during this publication symbolize the cutting-edge of terrain research equipment and methods in components of electronic illustration, morphological and hydrological types, uncertainty and functions of terrain research.
Read or Download Advances in Digital Terrain Analysis (Lecture Notes in Geoinformation and Cartography) (Lecture Notes in Geoinformation and Cartography) PDF
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Extra resources for Advances in Digital Terrain Analysis (Lecture Notes in Geoinformation and Cartography) (Lecture Notes in Geoinformation and Cartography)
The tendency of local variables to depend on grid mesh may appear not to be characteristic of some regional variables resulting in so-called scalefree variables (in contrast to scale-specific ones) that tend towards limit values as the grid mesh tends to zero (Shary et al. 2002, 2005). For example, the calculated depth of the Lake Baikal at a given point tends to the value one can measure from a boat (this is the limit value) as grid mesh tends to zero; note that corresponding regional variable is the depression depth, and that direct measurements from a boat are impossible for dry depressions (or for not completely filled ones, such as the Caspian depression) characteristic, for example, of large deserts (Shary et al.
National traditions have resulted in several meanings of the same term in the literature. g. g. Great Britain, USA), where it has come to denote a difference between maximal and minimal values of elevation. For example, King et al. (1999) used the first meaning, in contrast to Evans (1972). Geomorphometry is a science of quantitative land surface analysis (Pike 1995). The approaches under consideration may be attributed to general geomorphometry described by Evans (1972) as follows: ‘General geomorphometry as a whole provides a basis for the quantitative comparison even of qualitatively different landscapes, and it can adapt methods of surface analysis used outside geomorphology.
This may not be the case for regional attributes and landforms, because they are based on 52 Peter A. SHARY integrals that may exist even for non-smooth surfaces. The scale-free properties of some regional landforms were shown experimentally in Shary et al. (2002, 2005). g. g. grid mesh diminishes). Such topographic attributes do exist; examples are maximal catchment area in thalwegs (where it is an integral value), closed depression volume, and the maximal value of maximal catchment area that is reached at grid boundaries (Shary et al.