Milan Mikoláš

Application of terrestrial photogrammetry to the creation of a 3D model of the Saint Hedwig Chapel in the Kaňovice

AbstractThe present article focuses on application of terrestrial photogrammetry for the purposes of creation of photogrammetric documentation of building structures with the use of digital camera – a widely accessible device. First, the article briefly describes the individual intermediate operations of the whole process leading to the creation of a three-dimensional structure. Next, attention is given to operations related to camera calibration, reconnaissance of the locality of interest, photographing itself, creation of the 3D model as well as to presentation of graphical output. In conclusion, the article focuses on determining the accuracy of photogrammetric measuring.

Measuring shifts base to calibrate test equipment GNSS

Abstract This article deals with monitoring the stability of the geodetic base Skalka. Introduction of the article briefly describes the history and purpose of the geodetic base Skalka, gradually resulting in the current characteristics of the base. Main part of the article deals with monitoring the stability of points of the inner and partly outer part of the base. The result is the evaluation of performed geodetic works with the assessment of the testing base stability. Identified vertical and horizontal shifts show that the base can be considered stable in terms of both geological and geodetic points of view.

Evaluation Methods of Swot Analysis / Metody Vyhodnocení Swot Analýzy

Abstract Strategic management is an integral part of top management. By formulating the right strategy and its subsequent implementation, a managed organization can attract and retain a comparative advantage. In order to fulfil this expectation, the strategy also has to be supported with relevant findings of performed strategic analyses. The best known and probably the most common of these is a SWOT analysis. In practice, however, the analysis is reduced to mere presentation of influence factors, which does not allow more precise determination of a strategic concept. The content of the article tries to remove this drawback, submitting for public discussion two possible approaches to evaluate the SWOT analysis providing important information for the selection process of an organizations strategic orientation. Abstrakt Strategické řízení je neoddělitelnou součástí vrcholového managementu. Formulací správné strategie a její následnou realizací může řízená organizace získat a udržet komparativní výhodu. Aby strategie naplnila toto očekávání, je mimo jiné nezbytné, aby byla opřena o relevantní závěry provedených strategických analýz. Nejznámější a zřejmě i nejpoužívanější z nich je SWOT analýza. V praxi je však analýza redukována na pouhé uvedení vlivových faktorů, což neumožňuje exaktnější určení strategické koncepce. A právě tento nedostatek se snaží odstranit obsah článku, kterým jsou oborné veřejnosti předkládány k diskusi dva možné přístupy k vyhodnocení SWOT analýzy poskytující významné informace pro process volby strategické orientace organizace.

Comparison of Tacheometry and Laser Scanning Methods for Measuring the Quarry in Jakubčovice Nad Odrou / Porovnání Tachymetrie A Laserového Skenování Při Zaměření Části Lomu V Jakubčovicích Nad Odrou

Abstract The presented this method is more efficient for surveying a site. Part of this is the calculation of the volumes of excavated muck using 3D models and their comparison. The comparison of the measurements of part of the quarry in Jakubčovice nad Odrou using the tacheometry and laser scanning techniques was performed. The final assessment was in favour of the laser scanning method which provides capturing the entire object surface with a chosen level of detail compared to the tacheometry method, in which only characteristic points of the measured object, such as edges, are captured. Abstrakt Předložený článek se zabývá srovnáním klasické geodetické metody (tachymetrie) s metodou laserového skenování s cílem rozhodnout, která z uvedených metod je pro zaměření dané lokality efektivnější. Součástí je i výpočet objemů odtěžené rubaniny na příslušných 3D modelech a jejich srovnání. Bylo provedeno porovnání mezi zaměřením části kamenolomu v Jakubčovicích nad Odrou tachymetricky a pomocí laserového skenování se závěrečným hodnocením ve prospěch skenování. Skenování poskytuje zachycení celého povrchu objektu se zvolenou mírou detailu oproti tachymetrii, při které jsou zachyceny pouze charakteristické body objektu, jako například hrany apod.

Operation of Water Jet System in a Sandstone Quarry and its Impact on Production

The experiments with pure water jets were performed both in laboratory and in a quarry. The basic information about water jet system operation in quarry conditions has been acquired and some relations between data from a quarry and the laboratory ones have been determined. The efficiency of the cutting system in quarry conditions is considered and discussed.

TESTING THE EFFECT OF UNDERMINING ON POSITIONAL ACCURACY OF THE DIGITAL TECHNICAL MAP OF OSTRAVA IN THE PŘÍVOZ CADASTRAL DISTRICT

Abstract Intensive underground exploitation took place in the area of the Ostrava corporate town in recent past. After the coal mining was shut down in 1994 gradual subsidence in the town area has slowed down, however, establishing of the Digital Technical Map of Ostrava (DTMMO) dates back to 1992. When working a seam the original geostatic and tectonic stress state in the surrounding rock mass changes, which is accompanied by rock transformation and displacement from the roof towards the stope. Undermining is manifested in landscape morphology in many different ways that we can divide to continuous and discontinuous deformations. Residual mining effects could therefore have impacted positional accuracy of DTMMO in the last 18 years. The Bohumin 8-9/43 topographic sheet was selected for testing purposes in the Přivoz cadastral district.

SHIFTS OF TRIGONOMETRIC POINTS IN THE AREA AFFECTED BY MINING ACTIVITIES POSUNY TRIGONOMETRICKÝCH BODŮ NA ÚZEMÍ OVLIVNĚNÉM HORNICKOU ČINNOSTÍ

Abstract In the underground mining of deposits, except the subsidence of layers also a horizontal shift occurs. The shift of trigonometric points is detected by the renewal of network. Formerly, the new triangulation of the overall area of interest has been carried out and since 1991 with the onset of modern observation techniques the GNSS technology has been used in full, which is not so time-consuming and economically demanding as triangulation works. Abstrakt Při hlubinném dobývání ložisek nastává nejen sedání vrstev, nýbrž i vodorovný posun. Tento posun trigonometrických bodů je zjištěn měřickou obnovou sítě. Dříve byla prováděna nová triangulace celého zájmového území a od roku 1991 s nástupem moderní observační techniky se využívá v plném rozsahu technologie GNSS, která není tak časově a ekonomicky náročná jako triangulační práce.

The rise of the mine water level in the area of the former Kohinoor II mine and the influence on the surrounding aquifer systems of abandoned mines in the central part of the North Bohemian Brown Coal Basin

MIKOLAS, M., VARADY, J., BAŽANT, J., ŽOCEK, F.: The rise of the mine water level in the area of the former Kohinoor II mine and the infl uence on the surrounding aquifer systems of abandoned mines in the central part of the North Bohemian Brown Coal Basin. Acta univ. agric. et silvic. Mendel. Brun., 2011, LIX, No. 3, pp. 135–142 The aim of this article is to evaluate the process of terminating the mine water pumping a er the liquidation of the Kohinoor II coal mine, situated in the central part of the North Bohemian Brown Coal Basin (NBB) and the subsequent resumption of pumping from the surface a er the mine water rise in the area of the former mine to the desired level. We analyzed previously known data, particularly the amount of mine water pumped from the mine area and the surrounding abandoned mines in the past. Further the evaluation of known surrounding abandoned mines aquifer systems, accumulated in the coal seam (underground accumulation of water) and the evaluation of the eff ect of increasing the water level in the Kohinoor II mine, focusing on the enlargement of the central mine aquifers and the evaluation of the eff ects of changes in the way of pumping on the surrounding coal seam and its mining with continued safe brown coal mining at the nearby Bilina mine, that can be ensured for at least another 25 years. mine liquidation, mine water pumping, abandoned mines aquifer, North Bohemian Brown Coal

CALIBRATING THE PHOTOGRAMMETRIC UNIT

The calibration of a digital camera for the purposes of processing a three-dimensional model of an object was performed under the PhotoModeler program. Prior to creating a three-dimensional model of an object, the digital camera needs to be calibrated. Calibration is the verification of the data the measuring device provides. The creation of any three-dimensional object requires the calibration of the photogrammetric unit. The above resulted in picturing a 3D view and a calibration protocol containing the elements of the internal orientation and the photographic device.