Full Table of Contents. Math Forum - Ask Dr. Math. DICTIONARY OF ABBREVIATIONS AND ACRONYMS IN GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING. By Philip Hoehn and Mary Lynette Larsgaard (Librarian Emeritus, Map & Imagery Laboratory, University of California, Santa Barbara Library) Designed by John Creaser This dictionary decodes abbreviations and acronyms found in various publications including maps and websites. These abbreviations or acronyms, therefore, are not necessarily authoritative or standardized in format or content. Contact Phil Hoehn (philhoehn at juno com) Mary Lynette Larsgaard (mary at library ucsb edu) A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X-Y-Z | Numbers Other Lists Acknowledgements A Return to index B Return to index C Return to index D Return to index E Return to index F Return to index G Return to index H Return to index I Return to index J Return to index KReturn to Index Abbreviations L-Z.
GeodSci Global Earth Science. Welcome to macpurity's web site for Earth science and applied mathematics with emphases on geodesy and geophysics. This site provides resources and information for the topics listed below. Note: This website is perpetually subject to revision. Introduction. Land Surveying and Geomatics: Geodesy. GPS Site Motion Vector/Crustal Velocity Archive | Science Product Support | UNAVCO. GPS Site Motion Vector/Crustal Velocity Archive Composite GPS Velocity Map from sources in table below, showing solutions from GPSVEL 0.2, IGS ITRF96, and SCEC 2.0 in NNR ("no net rotation" frame). (Click on image to load UNAVCO's interactive Voyager map tool.) Description and Disclaimer NUVEL-1A-NNR plate velocities (yellow vectors) compared with GPS velocities (purple) at IGS sites and SCEC in the ITRF system.
Description: This is a list of station velocity files either linked to their source on the World Wide Web or archived at the UNAVCO Boulder Facility. Disclaimer: This archive is intended to be resource for finding information that is either published or on the World Wide Web. Submissions: Site motion vector/crustal velocity archive submission form GPSVEL GPSVEL Overview Products to date Methodology SINEX Submissions Related Pages: Stable North America Reference Frame (SNARF) Working Group Comments or questions about this page?
Unavco.org) Goddard Space Flight Center's Very Long Baseline Interferometry. The International Terrestrial Reference Frame (ITRF) ...About Geodesy: A Simple Way to Open Your Mind About it. What is Geodesy? Geodesy is the discipline that deals with the measurement and representation of the earth and other celestial bodies and their respective gravity fields, in a three-dimensional time varying space. What is Geomatics? Geomatics is the modern scientific term referring to the integrated approach of measurement, storage and display of the descriptions and location of earth-based data, often termed spatial data. These data come from many sources, including earth orbiting satellites, air and sea-borne sensors and ground based instruments. It is processed and manipulated with state of the art information technology using computer software and hardware.
What is concerned with? Everyday the results of the work of Geomatics Engineers are found around us, from the legal security of your property boundaries, the appropriate location of mobile telephone transmitters, the safe navigation of ships, to the protection of environmental resources. Some Applications of Geodesy. Satellite Geodetic Observatory. International Laser Ranging Service Home Page. Mirages and Green Flashes. Introduction First of all, what's a mirage? Mirages are not optical illusions, as many people (and Web sites!) Think. They are real phenomena of atmospheric optics, caused by strong ray-bending in layers with steep thermal gradients.
Because mirages are real physical phenomena, they can be photographed. Optical illusions, on the other hand, are perceptual quirks of human vision, in which the observer sees something that does not exist physically. In a mirage, there is at least one inverted image of some object. Often, a mirage contains multiple images, alternately erect and inverted. In addition, there are the recently-recognized “mock mirage” and Alfred Wegener's “late mirage” or Nachspiegelung.
Common misconceptions Sometimes people think that the erect image of a classical mirage is “the object itself,” and that the inverted one is “just a mirage,” and somehow not real. Indeed, from the point of view of geometrical optics, it is the inverted images that are “real images.” Transforming Remote Sensing Data into Information and Applications.