Propozycje udoskonaleń autoamtycznego generowania NMT

• Autorzy: Majde A.

Warianty tytułu

EN

Proposals for improving automatic generation of Digital Terrain Model

• Języki publikacji: PL

Abstrakty

PL

W pracy zawarto: krótką charakterystykę poziomu doskonałości, osiąganego przy automatycznym generowaniu NMT; opis pierwszego automatycznego systemu pomiaru wysokości i jego porównanie z systemami współczesnymi; propozycje modyfikacji, dających szansę podwyższenia wiarygodności wyników automatycznej korelacji obrazów.

EN

High accuracy of automatic measuring heights in photogrammetric digital stations is commonly known. But level of reliability is not parallel to this accuracy, as the systems, oriented at the most precise tonal correlation of pair surroundings at a priori defined points, were not equipped with tools enabling interpretation or classification of images. Based on experience of system’s operators and analysis of first and recent image correlator the main types of correlation errors were found, as well as types of land use, more susceptible to their emergence. The proposals of modifications, presented at the next part of article, were divided into two groups: simple improvements, based on maximum use of results obtained on previously correlated points; precedence of correlation process with automatic delineation of potentially troublesome sub-areas, supplemented with proposals of measurement strategies for some of these areas. Simple improvements are concentrated on dynamic definition of approximations and interval for currently correlated point and on rigorous use of measure of correlation quality for slight modification of measurement strategy. Proposal for urban areas is concentrated on trial of its measuring penetration through transportation routes, which can be treated as a frame to be used for overlaying the interpolated terrain surface. Such a surface can be further treated as a more valuable approximation, than that used previously.

Słowa kluczowe

PL

NMT; numeryczny model terenu

• Wydawca: Instytut Geodezji i Kartografii
• Czasopismo: Prace Instytutu Geodezji i Kartografii
• Rocznik: 2001
• Tom: T. 48, z. 104
• Strony: 181--187

Twórcy

autor

Majde A.

• Instytut Geodezji i Kartografii, Warszawa