This paper focuses on a field test that locates roof areas with a high solar potential and predicts the solar “harvest” per m. The test analyzes 2.5D LIDAR data provided by official surveying and mapping sources. The primary LIDAR data is prepared by masking the roofs’ contours and afterwards filtering the point cloud by a threshold value. The remaining LIDAR data, which represents the building...

SUMMARY Three Dimensional Building models are excessively used in various applications. Digital Surface Model is the back bone of the 3D building modeling. The automatic DTM generation techniques are not adequate for the built-up areas. The manual 3D digitization of the stereo images is time consuming. Establishing a semi-automatic technique for the 3D building modeling is required. The main go...

Techniques for performing change detection are developed and applied to digital aerial photographs of the Tessina landslide in Italy. Several automatic thresholding algorithms are compared, and a variety of filters are employed to eliminate much of the undesirable residual clutter in the thresholded difference image, mainly as a result of natural vegetation and man-made land cover changes. This...

An urban growth model using stochastic cellular simulation was developed with motivation to understand the consequence of zone management policies in lowland cities. The model could integrate the growth, decline, spread, intensification, and protected areas of the urban growth into a single generalization of both the Eden and the p-models. Calibration strategy was demonstrated using historical ...

The Android app developed in this work enables the user to take aerial photographs by throwing the smartphone in the air. This involved overcoming inherent limitations of the underlying system, such as camera lag and sensor saturation. A motion detection algorithm is proposed which reliably detects the stages of a vertical throw and copes with the system’s limitation. Experiments show that the ...

There is a lack of information on the environmental effects of urban change and the dynamics of greenspace. Such information is essential for a better understanding of the sustainability of urban development processes, both planned and unplanned. We therefore investigated the changes in land use and land cover of 11 residential areas in Merseyside, UK, using aerial photographs taken in 1975 and...

12 13 Coastal changes on sandy shorelines are continuous and occur at diverse spatial and 14 temporal scales. Gaining knowledge on beach change processes increases our capability 15 to manage risks affecting the increasing population living in coastal areas, especially 16 shoreline erosion. Processes and factors involved in mediumand short-term beach 17 changes depend on the morphological and d...

The objective of this study was to assess the relationship betweenvegetation, landform and physicochemical properties of soil. At the first terrainmap unit were provided using the landsat thematic mapper (TM) satellite images,aerial photograph, topographical and geology map. Field sampling was done in therepresentative area using plot sampling. 104 plots 100 m2 were sampled in eachplot landform...

Recently, a lnorthern red oak tree was found on the Bent Creek Experimental Forest, Buncombe County, North Carolina, with an unusual and interesting group of aerial roots originating from the callused area surrounding an old wound. This tree, shown in the accompanying photograph, is about 100 feet high, has approximately 3 log lengths and is 33.5 inches in diameter at 4.5 feet above the ground....