PRISM (Parameter-elevation Regressions on Independent Slopes Model) is a climate analysis system that uses point data, a digital elevation model (DEM), and other spatial datasets to generate gridded estimates of annual, monthly and event-based climatic parameters (Daly et al. 1994). Originally developed in 1991 for precipitation estimation, PRISM has been generalized and applied successfully to...

Highly accurate geometric correction is fundamental to the application of satellite images. In highly accurate geometric correction of remote sensing images for precise match to the base maps, the difficulties in capturing ground control points (GCPs), insufficient number of GCPs and low accuracy of the geo-referenced images remain to be frequent issues. In search for solutions to these issues,...

This paper presents the applications of Kriging spatial interpolation methods for meteorologic variables, including temperature and relative humidity, in regions of Vietnam. Three types of interpolation methods are used, which are as follows: Ordinary Kriging, Universal Kriging, and Universal Kriging plus Digital Elevation model correction. The input meteorologic data was collected from 98 grou...

Causal or conditional probability networks (CPNs) are shown to provide a natural framework for combining a time sequence of classified satellite images with other maps for environmental monitoring. The key features of CPNs are described by way of application to an example involving the monitoring of salinisation of farmland over time using satellite images and an ancillary data set derived from...

Video Streams of optical camera system are analysed by a video processing software which detects moving objects in the video. They are presented in image pixel coordinates. With the knowledge of the direction of the camera and the field of view this information can be georeferenced using maps of Digital Terrain Elevation Data (DTED). The output are plots in polar coordinates which are processed...

Most environmental modelling takes place within the toposequence. Conventionally, the terrain variables for these purposes have been derived from digital elevation models (DEMs) produced from large scale topographic maps (e.g. 1:25,000 (approx 30 meters)) or topographic data at that scale. Coverage in Australia of this scale DEM is very limited. However, global and continental coverage of DEMs ...

This paper presents a method for predicting areas at risk from dryland salinity using information derived from multi-temporal Landsat Thematic Mapper satellite images combined with landform data derived from high-quality digital elevation models. The method aims to reproduce expert opinion about the future extent of salinity by using decision trees to determine the relationship between salinity...

In this paper, we propose two methods aiming at updating Geographic Information System (GIS) urban maps using satellite high-resolution remote sensed images. Both methods are based on the input of a priori knowledge provided by GIS data, and a Digital Surface Model (DSM). This article introduces theoretical aspects of our methods; implementation is currently ongoing.

Skeleton lines of terrain, i.e. ridge and valley lines are essential features on topographic maps. A skeleton line is the one with minimum slope among the slope lines. Slope lines are the lines of the steepest slope. Skeleton lines are used for a wide range of aims, e.g. emphasizing land forms, generation of high fidelity digital terrain models, terrain generalization, determining characteristi...

The region of North-west Bohemia has been influenced by the open cast mining for more than the last hundred years. During this period has the coal mining activity become very intense leaving huge change on the landscape. We may require the original landscape for many purposes (historical, landscape renewal). One of the ways how to reconstruct the original shape of the landscape is the usage of ...