to determine the suitable indices for vegetation cover and production assessment based on the remote sensing data, simultaneous digital data with field data belonging to the spring rangeland of the semirom-isfahan province were analyzed. during two years of monitoring the annual, grass, forb, and shrub vegetation cover and the total production data from 86 were collected. the global positioning...

Soil salinity phenomena are one of the main problems of arid and semi-arid lands. Saline soils constitute a huge part of Iran, and also threaten its neighboring lands. Therefore, in order to optimum exploitation of such soils, qualitative monitoring is necessary. Recently, remote sensing techniques have been increasingly applied in monitoring soil characteristics. The present study was carried ...

Remote sensing data and information are shown great potential in supplying relevant spatial data and parameters at the appropriate scale for use in distributed hydrological models for water resource applications. In contrast with many conventional data normally represented by point measurements, remote sensing based measurements are spatially averages over the pixels can appropriate for distrib...

Since the first images acquired from airplanes (1915) and satellites (1960), remote sensing has had a great impact in diverse number of fields such as meteorology, military, topographic mapping, archaeology and forestry. Today remote sensing has even become a common tool for the general public, with location searches using high spatial resolution (< 1m) imagery on GoogleEarth or Bing Maps. The ...

Our study applies the object-oriented technology to extract urban green automatically, which could increase accuracy through evaluating and analyzing the quality of disaster spatial data by measuring the disfigurement points and disfigurement rate in disaster GIS based on error analysis. The study shows that for high resolution remote sensing images that the accuracy may increase about 20% base...

Remotely sensed imagery data from satellites and airborne platforms have become important tools to assess vulnerability of urban areas and to grasp damage distribution due to natural disasters. The platform and sensors of remote sensing should be selected considering the area to cover, urgency, weather and time conditions, and resolution of images. Satellites with optical and/or SAR sensors can...

1 National Institute of Hydrology, Roorkee-247 667, Uttarakhand, India 2 Department of Hydrology, Indian Institute of Technology-Roorkee, Roorkee-247 667, Uttarakhand, India 3 Center for Remote Sensing and Geo-Informatics, Sathyabhama University, Chennai-600 119, India 4 Indian Institute of Remote Sensing, ISRO, Dehradun-248 001, Uttarakahnd, India 5 Department of Water Resources Development an...

Schistosomiasis is a major healthy problem in China, which is one of most badly suffered four countries in the world, and Schistosoma japonicum infection is prevalent in China. In addition, the snail is the only intermediate snail host of Schistosoma japonicum. Therefore, elimination of snail is an important measure that controls and eliminates schistosomiasis. In order to find out the distribu...