Topographic effects on ventifacts development Mojave Desert, California
Investigations into processes of ventifact formation in the east-central Mojave Desert confirm the importance of topography as a control in the location, orientation, and intensity of ventifact abrasion.
Streamlined, oval-shaped, orientedtopographic highs in Massachusetts Bay are identified as the erosional remnants of drumlins. The topographic highs correlate with outlines of lag gravel deposits on the sea floor and both the highs and lag gravel
seafloor footprint have a distinct east-southeast long axis trend. This trend is similar to the preferred orientation of the long axes of drumlins in the Boston Basin and indicates the flow direction of the late Wisconsinan Laurentide Ice Sheet
is represented accurately and in detail. On thematic maps, which differ widely with regard to both scale and content, only ancillary topographical signs are precisely located because they serve as orientation in the geographical space, whereas the signs related
The scale is of greater importance on topographical maps than on thematic maps. On topographic ones, which also use standard scales established by convention, only conventional cartographical signs are used by means of which the content on the maps
to the main content (theme) on the map are usually much larger than the scale would allow and are often located also outside the actual topographical position. As examples, the A. includes tests with maps at different scales representing the smallest political
The orientation, size and shape of 578 lakes on Tuktoyaktuk Peninsula were obtained from 1 : 250 000 Canadian National Topographic Survey map sheets, using Arc View geographic information system. The coincidence of the modelled orientation and lake
statistics supports the efficacy of cross wind-induced effects in orienting the lakes. The similar orientation of existing lakes and former basins suggests that these processes have been effective for at least several centuries.
Three-dimensional topographic on the foreshore zone of sandy beaches
Topographic surveys are carried out to elucidate the characteristics of topographic changes in the foreshore zone of two study sites on the Kashima Coast, Ibaraki Prefecture (Kanto). Three types of topographic change were put in order and a three
There is very little soil water data in Slovenia. Most of them point oriented and is therefore very difficult to generalize on larger areas. The distribution of soil water was estimated using relief data. For quantitative measure of soil water
topographical wetness index (TWI) had been used. Topographical wetness index shows water accumulation in a given location and is a function of slope and upslope specific catchment area. - (IKR)
The influence of trade winds, local air-masses and topographic obstacles on the eolian movement of sand particles and the origin and distribution of dunes and ergs in the Sahara and Australia
Les ergs sahariens sont composés de formes éoliennes très variées alors qu'en Australie les dunes longitudinales sont les principales formes. Les ergs sont situés le long de courants de matériel éolien qui sont orientés approximativement NE-SW au
Cretaceous and Permo-Carboniferous sedimentary series. They examine joint orientation using field measurements and 3D seismic tomography. The orientation of linear topographic features (morpholineaments) shows a clear dependency on two perpendicular joint
systems, which exhibit either a ne-sW or a nW-se orientation. - (EN)
The maps are classified into general geographical and thematic maps. The general geographical maps can be topographic or chorographic maps, which show objects that help orientation. The thematic maps are made with another objective: to represent
The dynamics of water and energy fluxes in the high mountains of central Norway was studied along micro-spatial topographic gradients in different altitudes and regions of the Scandes. Landscape ecological processes like snow accumulation during
winter, snow melting, evaporation, percolation, soil moisture variability and temperature variations were quantified. Combining spatio-temporal data on physical environment functioning and vegetation patterns resulted in a process-oriented
This paper outlines an initial study examining the factors possibly responsible for a marked variation in dunefield migration trends. These factors include grain size variations, topographic effects on local winds, shoreline orientation
Topographic swath profile analysis : a generalization and sensitivity evaluation of a digital terrain analysis tool
Alpine Foothills. This analysis helped to identify topographic rims, tilted remnant surfaces and fluvial incision within the study area, even where these features are obscured by the dissected topography. Using this area as an example, sensitivity
to swath width, swath orientation and swath horizontal resolution was assessed in terms of comparison diagrams and numerical statistics (RMSE, tilt and step para meters). As a result, it is concluded that swath profiles and quantitative landform parameters
Topographical effects on the equilibrium-line altitude on glaciers
The most useful parameter to quantify the climatic effects on a glacier is the equilibrium-line altitude (ELA) : a line on the glacier where accumulation equals ablation. In this paper, the topographical and morphological effects on the ELA
Sous l'antiquité, le Yémen constituait un espace culturel important entre le Proche-Orient, l'Afrique du Nord et l'espace méditerranéen oriental. La République Fédérale d'Allemagne est depuis 1969 très active au Yémen dans le travail de fouilles
Official topographic cartography in Germany looks back on a history of more than two hundred years. Through various stages of development its analogue map products reached their highest level in the nineteen-eighties. Since 1990, i.e
. the reunification of Germany and the introduction of the topographical ATKIS-information system, topographic cartography and its new digital products developed as an integral part of the new system. At present, German official topographic cartography
excellent 3D geological exposure. These ridges are orientated north-south or along the most probable line of LGM ice margin retreat. The AA. combine topographic and geomorphic observations to explain the changing style of volcanism in space, and attribute
The AA. describe and explain a regional topographic and geomorphic expression of sub-glacial volcanism, namely that at Kverkfjöll, Iceland. This area comprises a series of parallel sub-glacially-erupted volcanic edifices, which together give
Automated identification of geomorphological and topographical features of the seabed by object based image analysis of digital terrain models
The aim of this study was to assess whether a successful Oriented or Object Based Image Analysis (OBIA) is feasible in the characterization of bedforms using a Digital Terrain Model (DTM) and certain of its derivatives toward fully automating seabed
Thermo-topographically induced winds in the boundary layer over the Etosha Pan
Boundary layer winds over the Etosha Pan in Namibia reveal a diurnal oscillation. An analysis of this phenomenon is presented with relation to synoptic forcing and thermo-topographical forcing. - (AJC)