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    Number 76/77

    January - December 2003

 

C O N T E N T S

Nota editorial
ANTONIO HERNÁNDEZ NAVARRO

Radicación Industrial y Complejidad Ambiental en la Ciudad de Tandil, Provincia de Buenos Aires, República Argentina
ANA C. ULBERICH

The Astronomical Longitude of Paramaribo
KENNETH W. BLESCH

Physical Environment in Land Use Designation. A Holistic Method and a Case of Cundinamarca, Colombia
JORGE M. MOLINA

El Catastro en España: Consolidación de un Modelo Multipropósito
MANUEL ALCAZAR

Carta Gravimétrica de la República Mexicana
ANTONIO HERNÁNDEZ NAVARRO

On Some Numerical Aspects of Primary Indirect Topographical Effect Computation in the Stokes-Helmert Theory of Geoid Determination
ROBERT TENZER
PETR VANÍCEK
SANDER VAN ECK VAN DER SLUIJS
ANTONIO HERNÁNDEZ NAVARRO

Algunos Aspectos Sobre Alturas Ortométricas y Normales
PETR VANÍCEK
MARCELO SANTOS
ROBERT TENZER
ANTONIO HERNÁNDEZ NAVARRO

Reunión Técnica de la Comisión de Cartografía

Nota Aclaratoria

La Realización del Sistema Geocéntrico de Referencia en Venezuela dentro del Marco del Proyecto SIRGAS
JOSÉ NAPOLEÓN HERNÁNDEZ

Plan de Trabajo de la Comisión de Cartografía del IPGH Periodo 2003-2005

Procedimiento para Obtener la Categoría de Socio Cooperador del IPGH

 

A B S T R A C T S

EDITORIAL NOTE

Antonio Hernández Navarro

2003 was a year full of events for our Institute, one of them, the death of Ing. Carlos A. Carvallo Yánez, motivated movements to the interior of the Commission of Cartography, therefore Dr Santiago Borrero Mutis happened to hold the position of Secretary General of the IPGH, and his place in our Commission was occuppied by TCL. Ing. Geog. Rodrigo Belly Vargas, whereas in the Vice-presidency by Dra. Alejandra Coll Escanilla.

Once again, our publication, firstly semestral, has been reduced to one issue for this year, nevertheless the quality of articles included is excellent, because of the works written by outstanding personalities of the University of New Brunswick, Canada.

In order to reduce costs, for the first time the Revista Cartográfica is published in electronic format, so the articles presented will arrive with greater fluidity to all interested in the matters included in our publication. We hope that this modality would be to our readers liking.

 

RADICACIÓN INDUSTRIAL Y COMPLEJIDAD AMBIENTAL EN LA CIUDAD DE TANDIL, PROVINCIA DE BUENOS AIRES, REPÚBLICA ARGENTINA

Ana C. Ulberich

The area of study comprises the urban section of the city of Tandil as well as the Industrial Park, the Industrial Area and sectors of environmental interest.

The objective (of the work) was to locate and delimit the area affected by each industry according to levels of environmental complexity.

To that end, the “Industrial Census of the city of Tandil” was updated and the "Categorisation" stipulated by the Government of the Province of Buenos Aires was adopted for the evaluation of the industrial environmental impact.

The resulting information was correlated with the Industrial Zonings and the Actual Use of the Soil.

This analysis was done as a result of the interpretation and integration of diverse thematic maps that at the same time show the obtained results.

 

THE ASTRONOMICAL LONGITUDE OF PARAMARIBO

Kenneth W. Blesch

In 1911 Van Stockum determined the astronomical longitude of Paramaribo from an absolute moon height in combination with star observations.

It is proved that the astronomical longitude of Paramaribo as published by Roelofs in his book, Astronomy Applied to Land Surveying is based on the astronomical observations of Van Stockum from 1911, corrected for precession and nutation.

 

PHYSICAL ENVIRONMENT IN LAND USE DESIGNATION. A HOLISTIC METHOD AND A CASE OF CUNDINAMARCA, COLOMBIA

Jorge M. Molina

This paper describes a holistic and systemic methodology and a case of study for the Environmental Land Designation Plans – ELDP, by laying emphasis primarily on the physical environment. The various components considered to evaluate the physical environment of the territory include geomorphology, water (surface and ground), soils, mineral resources, as well as natural restrictions, hazards and the type of ecosystem. All them are assessed to get a potential value of the territory through indicators, here called Geopotential. Considering this Geopotential value and different Uses for the territory the Carrying Capacity for the same territory is determined. Also this is correlated with the demand of the human activities to establish some scenarios for the land use designation.

The proposed methodology is applied to the Cundinamarca Province in Colombia. Within this region basic resources are exploited to satisfy the economic and social necessities of the community. Like any other natural resource the ones from Cundinamarca present restrictions on their use. They are evaluated in terms of real supply and demand in order to determine the balance between them. Finally three different scenarios are discussed for the land use designation in the Cundinamarca Province.

 

EL CATASTRO EN ESPAÑA: CONSOLIDACIÓN DE UN MODELO MULTIPROPÓSITO

Manuel Alcazar

This article analyses the historical situation, which lead to the creation of Cadastre over the centuries, the projects undertaken and the institution’s present situation.

It makes special reference to the strengthening relations between Property Registers and Notaries and describes the organic structure and function of the Property Register’s Governing Body (Dirección General del Catastro).

Finally, it illustrates the present Spanish Property Register model together with present initiatives. Furthermore, it outlines the strategies that would presumably be articulated once the process of computerization to be implemented in order to improve the relationship between the administrative process and the citizens is totally strengthened.

 

CARTA GRAVIMÉTRICA DE LA REPÚBLICA MEXICANA

Antonio Hernández Navarro

As an additional product to centimetric geoid determination for Mexican area, and taking in account that gravimetrical information is useful for other earth sciences, the National Institute of Statistics, Geography and Informatics (INEGI), take the task to generate an assortment of cartographical products that show variations of terrestrial gravity field at interested region. In this paper are shown the theoretical aspect, as well as employed methodology.

 

ON SOME NUMERICAL ASPECTS OF PRIMARY INDIRECT TOPOGRAPHICAL EFFECT COMPUTATION IN THE STOKES-HELMERT THEORY OF GEOID DETERMINATION

Robert Tenzer
Petr Vanícek
Sander Van Eck Van Der Sluijs
Antonio Hernández Navarro

After solving the geodetic boundary value problem in the Helmert space, the co-geoid has to be transformed back into the real space to obtain finally the geoid. For this transformation, the indirect topographical and atmospheric effects on the geoidal heights have to be evaluated. Martinec and Vanícek (1994) discussed theoretical aspects of the primary indirect topographical effect. In this paper, some aspects of the numerical evaluation are investigated.

 

ALGUNOS ASPECTOS SOBRE ALTURAS ORTOMÉTRICAS Y NORMALES

Petr Vanícek
Marcelo Santos
Robert Tenzer
Antonio Hernández Navarro

For a long time, geodesists have been discussing which of the height systems is more appropriate for a practical realization of the vertical datum. These discussions are now heating up again in different parts of the world, as individual countries and group of countries are embarking on another wave of modernization of their height networks. This new wave has been sparked by the advent of GPS ability to measure relatively accurate geodetic height differences.

There are two basic concepts of heights that are being seriously considered for adoption in the next of modernization of national height networks. These are the system of orthometric heights or Molodensky’s concept of normal heights. In this paper we attempt to throw some light on these to concepts and to answer some of the principal questions arising from the comparison of these two concepts. Both height systems are equally accurate. In our conclusions we present a recommendation that the system of orthometric heights be the one adopted.

 

LA REALIZACIÓN DEL SISTEMA GEOCÉNTRICO DE REFERENCIA EN VENEZUELA DENTRO DEL MARCO DEL PROYECTO SIRGAS

José Napoleón Hernández

This paper show the accomplish of the geocentric reference system of Venezuela, inside SIRGAS project (Geocentric Reference system for the Americas), performing a GPS surveying program with the purpose to establish a modern geodetic network, compatible with measuring satellite technologies, named Red Geocéntrica Venzolana REGVEN; and to establish a permanent GPS network, in order to have an accurate geodetic control, with the same standards as SIRGAS.

To overtake the mentioned REGVEN’s goals, the Insituto Geográfico de Venezuela Simón Bolivar, as the rector organism in geodetic field, has made two GPS satellite surveying campaigns in the national territory, one simultaneously with 1995 SIRGAS campaign, and the other one with SIRGAS 2000.

We use GPS receiver dual-frequency, taken at least, two bench marks during six to eight hours measuring sessions. To process GPS data with precise ephemeredes, we use BERNESE software, developed at University of Berne, Switzerland.

The final quality of point positioning at REGVEN stations were more or least two centimeters.

Also the project to established permanent stations network is shown, to enforce the geocentric reference system of Venezuela.

 

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