نتایج جستجو برای: wgs84
تعداد نتایج: 78 فیلتر نتایج به سال:
Electronic taxi dispatch systems are in wide use today. These systems have replaced the traditional VHF-radio dispatch by installing mobile data terminals in taxis, which typically provide GPS localization information and taximeter state. In the last couple of years, the broadcast-based radio messages for service dispatching were replaced by unicast-based messages between the taxi central and t...
روش مغناطیس سنجی از جمله مهم ترین روش های ژئوفیزیکی است، که به طور گسترده در اکتشاف کانسارها استفاده می شود. لذا برداشت، تفسیر و مدل سازی این داده ها از اهمیت خاصی برخوردار است و از جمله مهم ترین مراحل در اکتشافات ناحیه ای و تفصیلی محسوب می شود. با مدل سازی این داده ها می توان اطلاعات ارزشمندی از ساختار کانسار به دست آورد و از آن برای پیشنهاد موقعیت بهینه حفاری های اکتشافی استفاده کرد. کانسار س...
Spores and sclerotia are the main propagules that allow fungi to persist through unfavorable conditions and disperse into new environments. Despite their importance, very little is known about their longevity and dormancy, especially in ectomycorrhizal fungi. To assess the viability of ectomycorrhizal fungal spores in forest soil, we collected and buried non-sterile forest soil, in pots, in the...
The paper gives a general description of the Danube waterway data management in Croatia. For this purpose, we initiated the development of a specialized geographic information system (GIS), the so called River IS, which provides efficient waterway related data management for the Croatian part of the Danube River. In addition, Croatian activities in the Pan-European Programme Consortium Operatio...
Of the 6 cormorant species that inhabit the North Pacific, the Pelagic Cormorant (Phalocrocorax pelagicus) is the smallest and most widely distributed (Hobson 1997). Pelagic Cormorants breed from Baja California in the eastern Pacific north to the Bering and Chukchi Seas, and south across the western Pacific to southern China. North America supports an estimated one-third of the global populati...
In this paper we report our work on publishing linked data of the Trentino Region in Italy following the Open Government Data (OGD) Initiative and in compliance with INSPIRE directive. Introduction: As part of the Semantic Geo-Catalogue (SGC) project [15, 16], the Autonomous Province of Trento (PAT) published its geographical data as linked data in RDF. Within the INSPIRE Directive1, it is requ...
بهدلیل وجود منابع مختلف خطا در تعیین موقعیتهای مبتنی بر مشاهدات GNSS (Global Navigation Satellite System)، بویژه اثرات جوی، دقت حاصل از تعیین موقعیت مطلق لحظهای جوابگوی بسیاری از کاربردهای مورد نیاز نیست. برای چیرگی بر مشکل یادشده، روشهای ...
A Gps receiver can offer modern didactic opportunities for teaching different fields of physics, starting from working examples of space localisation and time scale comparisons. Our workshop showed how to implement the measurement set-up, and how to drive the active participation of the students in developing up-to-date experiments. In particular we gave new evidences of the difference between ...
Geostationary satellites, such as Meteosat Second Generation (MSG) or GOES, represent a key element in monitoring and forecasting the state of the Earth’s atmosphere [1]. Nevertheless, these satellites are useful for the estimation of solar irradiance, since the knowledge of the radiance reflected by clouds is the basis for the calculation of the transmitted irradiance. As a matter of fact, an ...
Following SPOT5 launch, Spot Image and French National Geographic Institute (IGN) have decided to design a worldwide accurate database called Reference3DTM using data from the High Resolution Stereoscopic SPOT5 instrument (HRS). This database consists in three information layers : Digital Elevation Model at 1 arc.second resolution, Orthoimage at 1/6th arc.second resolution and Quality Masks ; w...
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