Warianty tytułu
Photogrammetric data acquisition for the polish infrastructure for spatial information
Języki publikacji
Abstrakty
On a global scale, the main task of surveyors at present is to create and update databases covering the themes of economic and planning activities at different management levels. Exchange of information between different countries will be possible with the use of data exchange standards based on ISO standards and on XML and GML formats of data exchange. In Poland the following actions were taken:1) a concept of National Geographic Information System has been drawn out; 2) technical standard for creation of Topographical Databases with the accuracy of topographical maps of 1:10 000 has been worked out and works on creation of such a database have begun; 3) by 2005, topographical database with accuracy of 1:50 000 meeting the NATO standard Vmap Level 2 will be established jointly by civilian and military services for the area of the whole country; 4) legislative works are underway on amendments to the Law on Geodesy and Cartography paying special attention to proper regulations concerning functioning of the National Spatial Information Infrastructure. In view of high costs of creation and updating of the databases required, application of photogrammetry and remote sensing were considered appropriate as effective and economically justified ways of source data acquisition. In the paper we present: 1) state of the art in photogrammetric technologies, 2) new organisation of the State Geodetic and Cartographic Resources, 3) a proposal to build an imagery portal, 4) photogrammetric works of national scope currently carried out. Attention was drawn to the growing role of digital solutions in photogrammetry: digital cameras; registration of parameters and external orientation by means of GPS and INS systems, which eliminate aerotriangulation in middle scale mapping; automatic aerotriangulation in large scale mapping; ever wider application of satellite imagery. Three basic photogrammetric products are decribed: 1) digital vector map, 2) digital elevation modeland 3) digital orthophotomap. Attention is paid to the growing role of digital orthophotomap created in automatic processing of scanned aerial images and, recently, of high resolution digitally recorded satellite images. Advantages of the use of digital aerial cameras and satellite images are presented. The synchronized registration of an object in a few ranges of electromagnetic radiation (most often Pan, R, G, B and IR) enables creation of a variety of products and can provide, according to the requirements, panchromaticorthophotomaps, maps in natural colours or infrared, thus expanding the information potential and creating conditions for meeting the needs of a wider range of potential users of orthophotomaps. In the summary it was emphasised that: 1) up-to-date photogrammetric methods are very effective and efficient - they allow to meet the full scope of needs from cadastral databases to topographical ones; 2) the present state of works coordinated by the Head Office of Geodesy and Cartography shows that already in 2005 the whole area of the country will be covered by a uniform digital orthophotomap; 3) the digital orthophotomap will constitute the basic reference layer of the National Spatial Information Infrastructure and will be a source layer for many other reference or thematic databases;4) a priority task is to create an imagery portal as an element of the National Spatial Information Infrastructure.
Twórcy
- Główny Urząd Geodezji i Kartografii Instytut Fotogrametrii i Kartografii Politechniki Warszawskiej
Bibliografia
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BPW6-0010-0014
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