GGF 2 GEO

Do you want to see more videos like this? Then subscribe and turn on notifications! Don't forget to subscribe to my YouTube channel and RuTube channel. Rutube : https://rutube.ru/video/9f8c2e773a0b281898496203bed08c36/ Program implementira konverziju geoidnog modela iz binarnog GGF (Geoid Grid File) formata u tekstualni GEO (Leica GEOID Model File) format, prilagodjen za upotrebu u Leica geodetskim uredjajima. Ulazni GGF fajl sadrzi mrezu geoidnih separacija (razlika izmedju elipsoidne i geoidne visine) u WGS84 (World Geodetic System 1984) datumu, organizovanu u pravougaonu mrezu sa poznatim geografskim granicama. Algoritam koristi pametno citanje zaglavlja sa visestrukim pokusajima ocitavanja koordinata kako bi podrzao razlicite varijante GGF formata. Detektuje kompresovane naspram punih fajlova na osnovu odnosa stvarnog broja podataka i deklarisanih dimenzija mreze. Primenjuje dinamicko odredjivanje dimenzija mreze (broj redova × kolona) i razlikuje stvarne nule (validne geoidne separacije = 0 m) od laznih nula (nedostajuci podaci zbog kompresije ili greske u fajlu). Matematicki model se zasniva na bilinearnom pozicioniranju tacaka unutar mreze Program inteligentno filtrira lazne nule tako sto analizira njihov broj u odnosu na stvarne nule. Ako lazne nule znacajno premasuju broj stvarnih (sto ukazuje na kompresiju fajla), one se preskacu samo u zavrsnom delu mreze (donji desni kvadrant, priblizno poslednjih 20 % redova i kolona), gde se najcesce javljaju kao posledica skracivanja binarnog zapisa. Ovaj selektivni pristup cuva integritet podataka u gornjem levom, gornjem desnom i donjem levom delu mreze, dok istovremeno eliminise artefakte u izlaznom GEO fajlu, cime se osigurava visoka pouzdanost i preciznost konvertovanog geoidnog modela za upotrebu u terenskoj geodeziji. The program performs the conversion of a geoid model from the binary GGF (Geoid Grid File) format into the textual GEO (Leica GEOID Model File) format, developed for use in geodetic devices made by Leica. The input GGF file contains a grid of geoid separations (differences between ellipsoidal and geoidal heights) in WGS84 (World Geodetic System 1984) datum, organized in a rectangular grid with known geographic boundaries. The algorithm uses intelligent header reading with multiple attempts at reading coordinates to support the different variants of the GGF format. Detection of compressed versus full files will be based on the ratio of actual data points to declared grid dimensions. It does dynamic determination of grid dimensions through the number of rows × columns and distinguishes real zeros (valid geoid separations = 0 m) from fake zeros (missing data due to compression of a file or other errors). The mathematical model is based on bilinear positioning of points within the grid. The program intelligently filters fake zeros by analyzing their quantity relative to real zeros. If fake zeros significantly exceed the number of real ones (indicating file compression), they are skipped only in the final part of the grid (lower right quadrant, approximately the last 20% of rows and columns), where they most commonly occur as a result of binary record truncation. This selective approach preserves data integrity in the upper left, upper right, and lower left parts of the grid, while simultaneously eliminating artifacts in the output GEO file, ensuring high reliability and precision of the converted geoid model for use in field geodesy. RuTube Channel : https://rutube.ru/channel/1400643/ Youtube Channel : https://www.youtube.com/channel/UCNnd6dzXmsw7MeC1QlP4C4A LinkeDin : https://www.linkedin.com/in/sasalazic/ SrbsBuk : https://srbsbuk.com/members-2/donlaki/ Telegram : https://t.me/geoalatiplus web pages: http://geoalatiplus.in.rs #gnss #gps #agro #agriculture #latitude #longitude #geodetic #geodesy #surveyor #survey #surveying #srbija #projection #ellipsoid #etrs #etrf #itrs #itrf #landsurveyor #geo #геодезия #геодезија #geodezija #WGS #pravougle #koordinate #cors #latitude #longitude #agros #rgz #GNSS #PPP #RTK #Navigacija #Inzenjerstvo #GLONASS #GPS #Galileo #BeiDou #NavIC #NaukaITehnologija