Abstract
Abstract. The increasingly widespread implementation of databases with geographical component, as well as the impregnation of geolocation culture, is driving a transformation in the storage, management and exploitation of geospatial information. Real-world elements go from being modeled as mere geometric representations, with just cartographic purposes, to be features with their own entity. Unique identifiers and lifecycle management are assigned to these features, allowing interactions between feature instances from different databases, that is, facilitating digital transformation and, therefore, increasing exponentially the exploitation possibilities.In this regard, the National Geographic Institute of Spain (IGN, by its Spanish acronym) have implemented several processes in its National Topographic Database, such as the connection with the cadastral information, in order to take advantage of its updates and give feedback to improve cadastral data; or the link with the information, in addresses form, provided from different public administration, that is processed to geolocate features in the topographic database. Likewise, work is being done in order to implement new processes that allow linking with other data sets.These processes, in addition to reusing information produced by different public administrations, constitute an advance towards the objective of geospatial information databases continuous updating.
Highlights
A topographic database constitute an abstraction and digital modeling of a country, or an area, that collects a variety of topographic features such as elevations, communications, hydrography, populated sites, etc., through vector data structures that store two or three dimensional geometries using points, lines and polygons
Topographic databases are specially designed for the management and analysis of geographic information through the use of Geographic Information Systems (GIS), but they allow the generation of a variety of cartographic products, as well as the transformation to other data formats, such as the ones used in Computer Aided Design (CAD)
The National Topographic Database of Spain (BTN, by its Spanish acronym) constitutes the highest resolution, three-dimensional Geographic Information System, which covers consistently and homogeneously the whole country with topographic information of general purpose. It is the result of evolutions applied to the 1:25,000 National Topographic Map (MTN25, by its Spanish acronym) digital information, which have two main milestones:
Summary
A topographic database constitute an abstraction and digital modeling of a country, or an area, that collects a variety of topographic features such as elevations, communications, hydrography, populated sites, etc., through vector data structures (sequence of geographic coordinates) that store two or three dimensional geometries using points, lines and polygons. The National Topographic Database of Spain (BTN, by its Spanish acronym) constitutes the highest resolution, three-dimensional Geographic Information System, which covers consistently and homogeneously the whole country with topographic information of general purpose. At first, it is the result of evolutions applied to the 1:25,000 National Topographic Map (MTN25, by its Spanish acronym) digital information, which have two main milestones:. BTN creation, in 2005, based on the photogrammetric restitution files (data capture from stereoscopic pairs), with approximate scale 1:12,000, on which cartographic drafting processes have not been applied, what allows to obtain a database of greater resolution and with three-dimensional information. This made it possible to automatically ensure BTN integrity and spatial coherence
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