U radu je analizirano precizno mjerenje duljina plivačkih staza olimpijskog bazena u bazenskom kompleksu Svetice u Zagrebu. Geodetska izmjera duljine 10 uzdužnih plivačkih staza bazena obavljena je ...ručnim laserskim daljinomjerom. Računskom obradom ustanovljeno je da su duljine plivačkih staza unutar dopuštenih odstupanja od dimenzija koje je propisala Međunarodna plivačka federacija. Analizom rezultata određeni su statistički pokazatelji mjerenih duljina bazena. Kao parametri kvalitete mjerenja iskazana su standardna mjerna nesigurnost A-vrste, standardna mjerna nesigurnost B-vrste, sastavljena standardna mjerna nesigurnost te proširena mjerna nesigurnost. Iskazan je odnos točnosti mjerenja vremena na plivačkim natjecanjima i duljine bazena. Ustanovljeno je da maksimalno dopušteno odstupanje od propisanih duljina plivačkih staza bazena nema utjecaj na rezultate koje ostvare plivači na natjecanjima.
For the most common geodetic tasks such as surveying, staking out and monitoring, GNSS RTK method has in many cases been limited by its measuring quality. Combining laser system with GNSS RTK system ...enables the increase of vertical accuracy of measurement to a millimetre level. Testing the above mentioned systems for height determination will be presented in this paper. Since December 2008 CROatian POsitioning System (CROPOS) has been operational. GPS RTK system combined with laser system has been tested with CROPOS service, because more and more users are using this system in every day geodetic tasks. Testing the vertical accuracy of measuring modes has been done on the calibration baseline of the Faculty of Geodesy in Zagreb. Heights were determined by four different measuring modes; GPS RTK method in combination with laser system, GPS RTK method in combination with laser system linked with CROPOS service (VPPS - Very Precise Positioning Service), GPS RTK method and GPS RTK method linked with CROPOS service (VPPS). The authors of the paper will try to examine whether it is possible to achieve higher accuracy of vertical component when GPS RTK system is combined with laser system. Finally, the advantages, possible disadvantages, and vertical quality comparison of all measuring modes will be shown in this paper
In recent years, many papers have been published on the topics of the blockchain (BC) and blockchain technology (BCT). Some papers put BCT in the context of land registries (LRs), land cadastres ...(LCs), land registration, land administration (LA) and land management (LM) and its implementation benefits. Some eight years later, from its beginnings in 2014, the question of the future of the proposed concept and whether it has one, has been raised. The Scopus database was analysed using bibliometric analysis methodology and Rstudio software with the Bibliometrix R-package and the Shiny package environment. Based on this research, significant interest and growth in the topic was found in both technical and land-governance directions. Different approaches to the topic have been established in the global north and global south. From today’s perspective, the future of BCT in both worlds is guaranteed.
Razvoj i modernizacija GNSS-a Zrinjski, Mladen; Barković, Đuro; Matika, Kristina
Geodetski list,
03/2019, Volume:
73 (96), Issue:
1
Journal Article
Peer reviewed
Open access
Rad opisuje trenutačan status i planirani razvoj četiriju globalnih navigacijskih satelitskih sustava, američkoga GPS-a, ruskoga GLONASS-a, europskog sustava Galileo i kineskog sustava BeiDou. Za ...svaki sustav iznesen je koncept, sažet kronološki pregled s ključnim povijesnim događajima koji su obilježili njihov razvoj, kao i ostvarenu i planiranu točnost apsolutnog pozicioniranja. Suvremenija tehnologija i novi civilni signali sustava Galileo i BeiDou potaknuli su GPS i GLONASS na modernizaciju. Pregledno su opisane glavne karakteristike modernizacije i poboljšanja koja one donose u pozicioniranju, navigaciji i određivanju vremena. Uz globalne sustave, Indija i Japan razvili su regionalne navigacijske satelitske sustave NavIC i QZSS, kojih je koncept i razvoj također iznesen u ovom radu. Na kraju je dana usporedna analiza osnovnih parametara svih GNSS-a s osvrtom na njihovu nezaobilaznu primjenu u različitim aspektima ljudskog života.
PDF