Results 31 to 40 of about 7,005 (231)

Some key facts for the realization of a modern National Geodetic Reference System/Frame: The Hellenic case [PDF]

open access: yesMicro, Macro & Mezzo Geoinformation
The realization of a modern National Geodetic Reference System/Frame (NGRSF) for each country plays a crucial role in many applications, such as cadastre, public works, and, lately, the monitoring of climate change (at least at the local scale).
Dimitrios Ampatzidis   +2 more
doaj   +1 more source

The Geodetic Infrastructure of Ungheni District of the Republic of Moldova

open access: yesBulletin of the Polytechnic Institute of Jassy: Constructions, Architechture Section, 2021
Starting from 1999 a new geodetic reference system MOLDREF99 based on the ITRF97 and ETRS89 was established in Republic of Moldova. The realization of MOLDREF99 is the national GNSS Network with density about 1 point per 15 sq. km.
Chiriac Vasile, Nuca Dumitru
doaj   +1 more source

Predictive Distribution Modeling of the Medicinal Leech <i>Hirudo verbana</i> Carena, 1820 (Hirudinea, Hirudinidae) in Sicily: Implications for Conservation. [PDF]

open access: yesEcol Evol
A predictive distribution model for Hirudo verbana in Sicily was developed using 1980–2024 occurrence data and environmental variables. The species is associated with densely vegetated, high‐elevation lentic habitats and avoids human‐disturbed areas.
Liuzzo M, Utevsky S, Marrone F.
europepmc   +2 more sources

The dual choice of geodetic horizontal reference systems for Ukraine

open access: yesGeodesy and Geodynamics, 2023
Almost all European countries use at least two horizontal reference systems, which allow them to minimize all risks when changing the coordinate system.
Elena Novikova   +2 more
doaj   +1 more source

Canvi de sistema de referència ED50 a ETRS89

open access: closedRevista Catalana de Geografia, 2009
Grau, Joel, Bosch, Ernest
openaire   +2 more sources

Challenges and Harmonization of Local Datum Transformations within the Coordinate Reference Systems of North Macedonia [PDF]

open access: yesMicro, Macro & Mezzo Geoinformation
Accurate, reliable, and interoperable coordinate reference systems (CRS) form the basis of all modern geospatial, surveying, engineering, and cadastral activities.
Zoran Cvetkovski, Nikola Ribaroski
doaj   +1 more source

State of heavy metals pollution of flooded agricultural land in the North part of Republic of Srpska [PDF]

open access: yesAgroznanje, 2016
This paper presents the results of the research of soil contamination in flooded area located at the confluence of Bosna and Sava rivers. The sampling was performed according to a network of points Etrs89 reference European Network based on grid points ...
Predić Tihomir   +3 more
doaj   +1 more source

A Practical Procedure to Integrate the First 1:500 Urban Map of Valencia into a Tile-Based Geospatial Information System

open access: yesISPRS International Journal of Geo-Information, 2019
The use of geographic data from early maps is a common approach to understanding urban geography as well as to study the evolution of cities over time. The specific goal of this paper is to provide a means for the integration of the first 1:500 urban map
Miriam Villar-Cano   +2 more
doaj   +1 more source

An All-in-One Application for Temporal Coordinate Transformation in Geodesy and Geoinformatics

open access: yesISPRS International Journal of Geo-Information, 2020
Over the years, Global Navigation Satellite Systems (GNSS) have been established in the geosciences as a tool that determines the positions of discrete points (stations) on the Earth’s surface, on global to local spatial scales in a very simple and ...
Antonio Banko   +3 more
doaj   +1 more source

The NKG2008 GPS campaign – final transformation results and a new common Nordic reference frame

open access: yesJournal of Geodetic Science, 2016
The NKG 2008 GPS campaign was carried out in September 28 – October 4, 2008. The purpose was to establish a common reference frame in the Nordic- Baltic-Arctic region, and to improve and update the transformations from the latest global ITRF reference ...
Häkli P.   +8 more
doaj   +1 more source

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