Geospatial Metadata and GPS: Terms and Definitions, Quizzes of Geography

Download Geospatial Metadata and GPS: Terms and Definitions and more Quizzes Geography in PDF only on Docsity! TERM 1 Metadata DEFINITION 1 data about the content, quality, and condition of the data TERM 2 FGDC's standard for metadata DEFINITION 2 the objectives of the standard are to provide a common set of terminology and definitions for the documentation of digital geospatial data TERM 3 What is the ISO (2) DEFINITION 3 international Organization for Standardization19115 Geographic information- metadata TERM 4 Metadata categories (3) DEFINITION 4 description abstract: brief description of the dataset purpose: summary of why dataset was developed spatial coordinate system: map projection, datum spatial extent: min and max of X-Ys data model attributes field names TERM 5 Spatial data quality (6) DEFINITION 5 a general assessment of the quality if the data set lineage positional accuracy attribute accuracy logical consistency completeness processing TERM 6 Lineage (4) DEFINITION 6 source informationsource scale denominatortyper of data sourcetime period for material TERM 7 Positional accuracy DEFINITION 7 an assessment of the accuracy of the positions of spatial objects TERM 8 Attribute accuracy DEFINITION 8 an assessment of the accuracy of the identification of entities and assignments of attribute values in the dataset TERM 9 Logical consistency DEFINITION 9 an explanation of the fidelity of relationships in the dataset and the test used TERM 10 Completeness DEFINITION 10 `information about omissions, selection criteria, generalization, definitions used, and other rules used to derive the data set TERM 21 LORAN (2) DEFINITION 21 long range aids to navigationland based radio-navigation system for the continental US and Alaska TERM 22 What are the segments in the GPS (3) DEFINITION 22 spaceusercontrol TERM 23 How is position determined using GPS (2) DEFINITION 23 distances between satellites and GPS receivertrilateration using 4 satellite ranges TERM 24 What are the GPS services (2) DEFINITION 24 standard positioning service accuracy has been degraded available to civil users precise positioning service highest accuracy available to military and allies and federal employees TERM 25 What are the components in s GPS receiver (2) DEFINITION 25 handheld, backpack, or vehicle type receiver gps engine antennae display keypad optional remote antennae port data port TERM 26 What are the GPS-derived positions relative to (2) DEFINITION 26 WGS 84center of ellipsoid at center of Earth's mass, not orthometric height TERM 27 What is the GPS-derived time relative to DEFINITION 27 UTC- coordinated universal time TERM 28 L2C benefits (2) DEFINITION 28 better for locking on signalsame receiver power requirements as L1 TERM 29 Global navigation satellite systems (4) DEFINITION 29 GPSGLONASSGalileo (EU)Compass TERM 30 How accurate are the estimates using GPS DEFINITION 30 GPS based 67% of all calls must be within 50m 95% of all calls must be within 150m accuracy needed distance (100m) probability (100%, 67%) TERM 31 What are the major categories of GPS receivers DEFINITION 31 uses absolute positioning: determines position strictly from range estimates and uses relative positioning: determines position from range + local observed errorssingle frequency receiver (handheld)dual frequency receiver (mapping and surveying) TERM 32 What are the sources of error when using GPS (6) DEFINITION 32 ionospheretropospheremulti-pathsatellite clock errororbit errorgeometry of satellites TERM 33 What is differential correction DEFINITION 33 is based on the concept that observed errors in distance can be used to correct errors at other locations TERM 34 What are the sources of differentially corrected data (2) DEFINITION 34 post processing approach user supplied reference station continuously operating reference station real-time correction approach nationwide differential correction data wide area augmentation system virtual reference system