GIS terms starting with R

31 terms

  1. raster A cellular data structure composed of rows and columns for storing images. Groups of cells with the same value represent features. See also grid.
  2. real numbers Decimal numbers (e.g., 3.1417, 0.25, 1.8992, 6.0).
  3. record All the documents and evidence plus transcripts of oral proceedings in a case.
  4. Record Lot Defined by the DC Surveyor. These are official, platted, recorded subdivision lots created by the DC Surveyor's Office in compliance with the Subdivision…
  5. Recreation Recreational opportunities at more than 1,900 federal recreation sites managed by the Bureau of Reclamation and other federal agencies can be found at the…
  6. rectification The process by which an image or grid is converted from image coordinates to real-world coordinates.
  7. referential integrity The capability to ensure that changes to one table that affect other tables are transmitted to those other tables.
  8. region A coverage feature class used to represent a spatial feature as one or more polygons. Many regions can be defined in a single coverage.
  9. registered table A DBMS table which is part of an ArcStorm database is said to be 'registered' with the database.
  10. relate An operation that establishes a temporary connection between corresponding records in two tables using an item common to both (i.e., relate key).
  11. relate key The common set of columns used to relate two attribute tables. See also relate, primary key and foreign key.
  12. relation See table.
  13. relational database A method of structuring data as collections of tables that are logically associated to each other by shared attributes.
  14. Relational database management system (RDBMS) A database management system with the ability to access data organized in tabular files that can be related to each other by a common field (item).
  15. relational join The operation of relating and physically merging two attribute tables using their common item.
  16. Remote Procedure Call (RPC) A Remote Procedure Call (RPC) is a communication mechanism which allows one UNIX process to communicate with another UNIX process.
  17. remote sensing Method for determining characteristics of an object, organism or community from afar.
  18. resampling The process of reducing image data set size by representing a group of pixels with a single pixel.
  19. Reservations Lands acquired for use by the Federal Government after the original founding of the city. There are presently more than 750 US Reservations in DC.
  20. Resolution See DPI.
  21. Restore To transfer data from a backup medium (such as tapes) to an on-line system, often for the purpose of recovery from a problem, failure, or disaster.
  22. ridgeline A line representing the intersection or top between opposite slopes. Commonly used as a parcel line.
  23. roll back To cancel any changes to a database made during the current transaction. Compare with commit.
  24. Root mean square (RMS) error A measure calculated when registering a map to a digitizer, indicating the discrepancy between known point locations and their digitized locations.
  25. route A route of administration is a way of administering a drug to a site in a patient.
  26. route attribute table (RAT) Route attribute table. An RAT stores route attributes. There is one RAT for each route-system in a coverage.
  27. route measure A location along a route, defined as a measure from a start point, where measures include distance, time, milepost, address range.
  28. route-system A collection of routes representing separate instances of a common linear entity, for example, all school bus routes in a city.
  29. ROW Rest-of-World.
  30. rubber sheeting A procedure to adjust coverage features in a nonuniform manner. Links representing from- and to-locations are used to define the adjustment.
  31. run-length encoding A data compression technique for storing raster or gridded data. Run-length encoding stores data by row.