This paper sets out to discuss ongoing activities in the tide and chart datum components of hydrography and charting. It expands on the paper presented at FIG (Fédération Internationale des Géomètres) in Brighton 1998 by Mr Matt Higgins and is a revised and updated version of the paper Chart Datum for Hydrography by GPS delivered by the present authors to the Survey 99 Congress, Sunshine Coast,...

The purpose of this work is to perform the comparison heights global geoid models EGM08, EIGEN-6C4, GECO, and XGM2019e based on sector analysis that are obtained relative ellipsoid WGS84 GRS80 in order implement method GNSS leveling local areas. determined from should be reduced by −41 cm (“zero-degree term”) scale them calculated leveling. Heights increased +52 cm. Spatial system for northern ...

The accurate estimation of the zero-height geopotential level in a local vertical datum (LVD) is critical for linking traditional height reference systems to global system. In this paper, we investigate theoretical and practical challenges involved determining offset between North American (NAVD) (GVD). Drawing on classical theory system physical geodesy, define derive rigorous formulas its cal...

Society, including many European governments, has a strong belief in the reliability of today’s primary radio navigation system, GPS. Unfortunately, space-based as well as terrestrial-based systems have some serious limitations that cannot be ignored if continuity of service plays a keyrole in the process in which these systems are used. The paper indicates some weaknesses of radio navigation s...

There is increasing need to apply established standards for recording data on mosquito collection events, because of the diversity of potential data providers, and the growth and interoperability of online databases designed to host these collection records. In particular, adequate taxonomic and georeference data are needed for geodatabases such as Mosquitomap (http://www. mosquitomap.org/) tha...

The scourge of explosive devices such as landmines, improvised and unexploded ordnance, a product armed conflicts in several countries around the world, has set great precedent violation fundamental human rights. In Colombia, efforts government NGOs to reduce their effects have succeeded clearing minefields more than 8 million square metres destroying 7000 devices. standards for finding (Confir...

Atmospheric refraction is one of the most significant factors that affect geolocation accuracy high-resolution remote sensing images. However, current atmospheric correction methods based on empirical data neglect spatiotemporal variation pressure, temperature, and humidity atmosphere, inevitably resulting in poor geometric positioning accuracy. Therefore, terms problems mentioned above, this s...

The increasing spread of the Asian tiger mosquito, Aedes albopictus, in Europe and US raises public health concern due to the species competence to transmit several exotic human arboviruses, among which dengue, chikungunya and Zika, and urges the development of suitable modeling approach to forecast the spatial and temporal distribution of the mosquito. Here we developed a dynamical species dis...

Geocentric translation model (GTM) in recent times has not gained much popularity in coordinate transformation research due to its attainable accuracy. Accurate transformation of coordinate is a major goal and essential procedure for the solution of a number of important geodetic problems. Therefore, motivated by the successful application of Artificial Intelligence techniques in geodesy, this ...

Sea level is traditionally observed with tide gauges (TG). These measurements are relative to the Earth’s crust. To improve the understanding of sea level changes it is necessary to perform measurements with respect to the Earth’s center of mass. This can be done with satellite techniques. Global Navigation Satellite System (GNSS) is a tool that can solves several hundred kilometers vectors wit...