V prispevku je obravnavana problematika zagotavljanja kakovosti podatkov aerolaserskega skeniranja. Predstavljeni so delni rezultati projekta, imenovanega »Lasersko skeniranje in aerofotografiranje ...Slovenije 2011«. Opisani so postopki nadzora kakovosti rezultatov s poudarkom na georeferenciranju, ki bi ustrezalo merilom za njihovo uporabo pri upravljanju voda. Izpostavljeni so dejavniki, ki vplivajo na kakovost podatkov. Dosežena kakovost neposrednega georeferenciranja je ocenjena na podlagi izkušenj, pridobljenih pri nadzoru kakovosti rezultatov projekta. Obravnavana je tudi kakovost transformacij v državni ravninski in višinski referenčni sistem. Podana so priporočila za naknadno izboljšanje kakovosti podatkov, ki bo mogoče z vzpostavitvijo novega državnega višinskega referenčnega sistema in novega modela geoida ; This paper deals with the problems of quality assurance for airborne laser-scanning data. Partial results of the project entitled ‘Laser Scanning and Aerial Photographing of Slovenia 2011’ are presented, and the quality control procedure is described. The focus is on the quality assurance of the geo-referencing used for water resource management. Important issues with an impact on the quality of data are addressed and evaluated. The quality of direct geo-referencing was investigated, and some experiences gained in the quality control of the project results are presented. The quality of the transformation of data into the national horizontal and height reference systems is also discussed. Some recommendations for the quality improvement of airborne laser-scanning data are given. This will be possible with the realisation of the new national height reference system and with the creation of the new geoid model.
Water quality refers to the chemical, physical, biological, and radiological characteristics of water. It is a measure of the condition of water for the purposes intended for. It is most frequently ...used by reference to a set of standards against which compliance can be assessed. The most common standards used to assess water quality relate to health of ecosystems, safety of human contact and potable drinking water. A range of diverse topics in the field of water quality modelling, statistical evaluation and guidelines pertaining to the best management practices in different locations around the world is given herein. Modelling of water quality in rivers and lakes, statistical methods and membrane filter performance are subject matters of interest considering in-situ water, potable water, water re-use, etc.
V prispevku so predstavljeni vse večji pomen kakovosti geodetskih in prostorskih podatkov, določbe o kakovosti prostorskih informacij v direktivi INSPIRE in predpisih, sprejetih na njeni podlagi, ter ...zahteve, povezane s kakovostjo prostorskih podatkov in storitev, ki jih pred slovenske ponudnike podatkov in storitev postavlja evropska zakonodaja ; This article presents the growing importance of the quality of geodetic and spatial information. It describes the contents related to the data quality in the INSPIRE Directive, regulations for its implementation and guidelines, as well as the requirements related to the quality of spatial data and services set for Slovenian suppliers of data by European legislation.
The data quality of topographic maps involves a degree of deviations of geometric and thematic content from their actual position and status in nature, respectively. For determining the geometric ...accuracy, comparative way of testing is usually applied, namely the comparison of measured values of topographic maps with "true" or "conditionally true" values (numeric data of positional and elevation network or data of a map in a larger scale, where the content errors of individual elements could be neglected in comparison due to differences in the scale of mapping). This method gives a direct accuracy assessment of printed maps and reproduction originals, as opposed to the experimental method which considers and determines errors in certain phases in the process of making topographic maps. Geometric, and to a large extent thematic accuracy of topographic maps are not always reliable enough and depend on the way of surveying and the type of contents, i.e. from geodetic control points, which are more accurate, to vegetation whose positional accuracy is the worst.
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