Airborne Laser Scanning (ALS) is capable of estimating a variety of forest parameters using different metrics extracted from the normalized heights of the point cloud using a Digital Elevation Model (DEM). In this study, six interpolation routines were tested over a range of land cover and terrain roughness in order to generate a collection of DEMs with spatial resolution of 1 and 2 m. The accu...

Spatial and temporal variability analysis of precipitation is an important task in water resources planning and management. This study aims to analyze the spatial and temporal variability of precipitation in the northeastern corner of Iran using data from 24 well-distributed weather stations between 1991 and 2015. The mean annual rainfall, precipitation concentration index (PCI), and their coef...

In India, near Chennai, Pammal Panchayat of Tambaram Taluk, there are more than 145 tannery industries functioning since 1945, covering six square kilometre area. To assess the level of chemical contamination of the study area, 3D model Triangulated Irregular Network (TIN) has been generated using GIS software such as Arc Sene, Arc Map. Using the cross validation technique from the software ana...

Objectives: The increasing incidence of dengue fever has become a priority health issue for Sri Lanka. Recent dengue outbreaks in Sri Lanka show two trends: yearly increase of total number of dengue incidence and increasing dengue outbreaks outside the endemic urbanised areas in the south and the west. Identification of factors responsible for dengue outbreaks and the mapping of potential risk ...

Epidemiological studies have identified associations between mortality and changes in concentration of particulate matter. These studies have highlighted the public concerns about health effects of particulate air pollution. Modeling fine particulate matter PM2.5 exposure risk and monitoring day-to-day changes in PM2.5 concentration is a critical step for understanding the pollution problem and...

Natural disasters in Indonesia have become an annual cycle, example is flooding. This study aims to determine the flood risk potential Mempawah watershed and places likely be flooded. The method used was a survey interpretation of secondary data from topographic maps, Sentinel-2A images, Digital Elevation Model images. Furthermore, analysis includes Standardized Precipitation Index (SPI), Norma...

Precipitation plays a crucial role from social and economic perspective in Subtropical Argentina (STAr). Therefore, it renders the need for continuous reliable precipitation records to develop serious climatological researches. However, this region are frequently inhomogeneous scarce, which makes necessary deal with data filling methods. Choosing best method complete series relies on rain gauge...

This paper focuses on designing and implementing parallel adaptive inverse distance weighting (AIDW) interpolation algorithms by using the graphics processing unit (GPU). The AIDW is an improved version of the standard IDW, which can adaptively determine the power parameter according to the data points' spatial distribution pattern and achieve more accurate predictions than those predicted by I...

Spatial discontinuity often causes poor accuracy when a single model is used for the surface modeling of soil properties in complex geomorphic areas. Here we present a method for adaptive surface modeling of combined secondary variables to improve prediction accuracy during the interpolation of soil properties (ASM-SP). Using various secondary variables and multiple base interpolation models, A...