Table 5.21 -- EDCS Classifications whose label begins with R
| Label | Definition | Related concepts | Code |
| R_AND_D_BUILDING | A building supporting scientific experimentation or research, including scholarly investigation or inquiry, intended to ultimately result in commercial products. | EC R_AND_D_FACILITY | 693 |
| R_AND_D_FACILITY | A site and associated buildings supporting scientific experimentation or research, including scholarly investigation or inquiry, intended to ultimately result in commercial products. | EC R_AND_D_BUILDING | 694 |
| RACE_TRACK | A course for racing, e.g., horses or automobiles. | 695 | |
| RADAR_DEVICE | Equipment used for the reception of, or transmission of, radar signals. | 696 | |
| RADAR_LINE | Mid-channel lines corresponding to the lines in harbour radar displays. | 697 | |
| RADAR_MATERIAL_CHARSET | A set of radar-specific characteristics of the material composing an object, e.g., reflectivity. | 698 | |
| RADAR_RANGE | An ocean region within range of a radar surveillance station; inside this region a vessel may request shore based radar assistance, particularly in poor visibility. | 699 | |
| RADAR_REFERENCE_LINE | A line shown on a chart in proximity to a shipping route, along which ships are guided by a traffic control centre located in a radar station. | EC RADAR_LINE | 700 |
| RADAR_STATION | The location of a radar device. | EC RADAR_DEVICE | 701 |
| RADAR_TRANSMITTER | A device for transmitting and receiving radar signals | EC RADAR_DEVICE | 702 |
| RADIOLOGIC_HAZARD | A region in which a radiologic substance that can kill, seriously injure, or incapacitate a person or animal through its physiological properties, is present; usually dispersed over a surface or within the atmosphere. | EC BIOLOGIC_HAZARD, EC CHEMICAL_HAZARD | 703 |
| RAILHEAD | A location where materials can be loaded or unloaded from railroad wagons. | 704 | |
| RAILROAD | A rail or set of parallel rails on which a train or tram runs. | 705 | |
| RAILROAD_BUILT_UP_REGION_CN | An abstract description of the connectivity (centerline or nexus) afforded by one or more railroads passing through or meeting within a built up region. | EC BUILT_UP_REGION, EC RAILROAD | 706 |
| RAILROAD_SIDING | A short stretch of track used to store rolling stock or enable trains on the same line to pass. | EC RAILROAD, EC RAILROAD_SPUR | 707 |
| RAILROAD_SIDING_OR_SPUR | A stretch of railroad tracks connected to the main track by switches, and used for temporary storage and loading/unloading. May be further delineated specifically as EC RAILROAD_SIDING or EC RAILROAD_SPUR. | EC RAILROAD | 708 |
| RAILROAD_SIGNAL_BOX | Automated equipment from which signals are sent to control the movements of railway trains; e.g., a signal box or tower. | EC RAILROAD, EC RAILROAD_SIGNALMAN_HOUSE | 709 |
| RAILROAD_SIGNALMAN_HOUSE | A manned structure located adjacent to a railroad that displays control information to passing trains; e.g. signalman house. | EC RAILROAD, EC RAILROAD_SIGNAL_BOX | 710 |
| RAILROAD_SPUR | A short side track that connects with the main track (trunk line) of a railroad system. | EC RAILROAD, EC RAILROAD_SPUR | 711 |
| RAILROAD_STATION | A building or stopping place along a rail route for taking on and letting off passengers, or for servicing. | EC RAILROAD | 712 |
| RAILROAD_STRRPR_BUILDING | A building that is used for the servicing, repair and/or storage of rail cars and related railroad equipment. | EC RAILROAD | 713 |
| RAILROAD_STRRPR_FACILITY | A collection of one or more buildings, and related structures, used for the servicing, repair, and/or storage of rail cars and related railroad equipment. | EC RAILROAD, EC REPAIR_FACILITY | 714 |
| RAILROAD_SWITCH | A device integrated with a railroad line with which rails may be switched to permit access to another line. | EC RAILROAD | 715 |
| RAILROAD_TABLE | A rotating platform with railroad tracks used for turning locomotives or cars/carriages. | EC RAILROAD, EC ROUNDHOUSE | 716 |
| RAILROAD_TABLE_OR_HOUSE | A rotating platform with railroad tracks used for turning locomotives or cars/carriages, which may be enclosed within a structure. May be further delineated specifically as EC RAILROAD_TABLE or EC ROUNDHOUSE. | EC RAILROAD | 717 |
| RAILROAD_YARD | A system of tracks within defined limits, and associated structures, provided for loading/unloading and assembling trains, e.g., railroad or marshalling yard. | EC RAILROAD | 718 |
| RAILROAD_YARD_CN | An abstract description of the connectivity (centerline or nexus) afforded by one or more railroads passing through or meeting within a railroad yard. | EC RAILROAD, EC RAILROAD_YARD | 719 |
| RAIN_REGION | A region in which rain is falling, over land or water. | 720 | |
| RAMP | An inclined plane, usually man-made, for moving between two levels. | EC SLIPWAY | 721 |
| RAMPART | A defensive wall built to defend a fort, or a similar defensive work, which is sometimes equipped with guns, e.g., a bastion or rampart. | EC PREPARED_DEFENSIVE_REGION | 722 |
| RANGER_STATION | A building housing a warden employed to maintain and protect a forest or other natural site or region. | EC FOREST, EC FOREST_PRESERVE | 723 |
| RAPIDS | A place in a stream or river where the current is swift and the surface is usually broken by boulders and rocks. | 724 | |
| RECREATIONAL_COMPLEX | A site and associated buildings used for the purpose of refreshment of one's mind or body through activity that amuses or stimulates. | EC ATHLETIC_COMPLEX | 725 |
| RECREATIONAL_PIER | A structure extending into the water used as a platform for recreational purposes (e.g., fishing or promenade), and not intended as a berthing place for vessels. | 726 | |
| REEF | A rocky or coral elevation at or near enough to the surface of the sea to be a danger to surface navigation. | 727 | |
| REFORMATORY_BUILDING | A building used for the discipline, reformation, and training of young or first offenders. | EC REFORMATORY_FACILITY | 728 |
| REFORMATORY_FACILITY | A site and associated buildings for the discipline, reformation, and training of young or first offenders. | EC JAIL, EC PRISON, EC REFORMATORY_BUILDING | 729 |
| REFUELING_TRACK | A specific route designated for channelling the flow of traffic as necessary for the purpose of air refuelling. | 730 | |
| REFUGEE_COMPOUND | Facilities, usually temporary, constructed to house groups of persons fleeing from their community in search of refuge, as in times of war, political oppression, or religious persecution. | 731 | |
| REGIONAL_PARK | A significant tract of land set aside for public use, generally with few or no buildings and located away from urban regions, which is maintained for recreational and ornamental purposes. | EC BOTANICAL_GARDEN, EC LOCAL_PARK, EC NATIONAL_PARK | 732 |
| REGULATED_LINE | A boundary established to regulate matters between nations or groups over a specific territory, e.g., a mandate or convention line | 733 | |
| RELATED_OBJECT_SET | A collection of associated objects. | 734 | |
| RELATIVE_DISPLACEMENT_LINE | A line connecting points having a constant relative vertical offset from the terrain surface. | EC VARIABLE_DISPLACEMENT_LINE | 735 |
| REPAIR_BUILDING | A building used for restoring broken or damaged equipment or other goods to sound condition. | 736 | |
| REPAIR_FACILITY | A collection of one or more buildings used for restoring broken or damaged equipment or other goods to sound condition. | EC RAILROAD_STRRPR_FACILITY | 737 |
| RESERVE | A tract of land set apart by a governmental body for a special purpose, e.g., reserve or reservation. | 738 | |
| RESERVOIR | A man-made enclosure or basin formed for the storage of water. | EC LAKE | 739 |
| RESERVOIR_CN | An abstract description of the connectivity (centerline or nexus) afforded by a reservoir among related rivers or streams. | EC RESERVOIR, EC RIVER | 740 |
| RESIDENTIAL_REGION | A region of buildings primarily devoted to housing a population, as well as providing a variety of supporting services, e.g., postal services, grocery stores, dry cleaners, florists, restaurants, and small retail facilities. | 741 | |
| RESTAURANT | A building or outdoors site where meals are served to the public. | EC PUBLIC_INN | 742 |
| RESTRICTED_REGION | A region in which certain aspects of navigation are restricted. | 743 | |
| RETAIL_FACILITY | A site and associated buildings for the sale of goods or commodities in small quantities directly to consumers. | EC COMMERCIAL_BUILDING, EC MARKET, EC SHOPPING_CENTRE | 744 |
| RICE_FIELD | A parcel of land that is periodically covered with water and is used for growing rice. | 745 | |
| RIDGE_LINE | A line delineating the top of a ridge. | EC VALLEY_BOTTOM_LINE | 746 |
| RIG_OR_SUPERSTRUCTURE | A vertical structure fitted for drilling or lifting operations. May be further delineated specifically as EC DRILLING_RIG or EC DRILLING_RIG_SUPERSTRUCTURE. | 747 | |
| RIP_RAP | A loose assemblage of broken stones or similar material that is erected in water or on soft ground as either a foundation or to protect the underlying surface from erosion. | 748 | |
| RIVER | A natural flowing watercourse, e.g., a river or stream. | 749 | |
| RIVER_BANK | The limit line between the water portion of a river and the adjacent land. | 750 | |
| RIVER_CN | An abstract description of the connectivity (centerline or nexus) afforded by a river or stream. | EC CANAL_ROUTE, EC RIVER | 751 |
| RIVER_ROUTE | The route in a river suitable for the largest allowed vessels. | EC CANAL_ROUTE | 752 |
| RIVER_VANISHING_POINT | The point at which a river or stream passes into the ground. | 753 | |
| ROAD | An open way maintained for vehicular use. | 754 | |
| ROAD_BUILT_UP_REGION_CN | An abstract description of the connectivity (centerline or nexus) afforded by one or more roads passing through or meeting within a built up region. | EC BUILT_UP_REGION, EC ROAD | 755 |
| ROAD_INTERCHANGE | A connection designed to provide traffic access from one road to another. | 756 | |
| ROADSIDE_REST_STOP | A roadside place usually having facilities for people and/or vehicles. | 757 | |
| ROCK_SHED | A shelter built to protect a section of road or railroad from rockslides. | EC GALLERY, EC SNOW_SHED | 758 |
| ROCKY_LANDMARK | An isolated rocky formation or single large stone existing in its entirety above the high water mark, which is conspicuous, and which would appear to a mariner as a single point on land and would be appropriate for use in navigation. | EC ROCKY_OUTCROP | 759 |
| ROCKY_OUTCROP | A visual topographic outcrop, layers (strata), or beds of rock. | EC ROCKY_LANDMARK | 760 |
| ROLLING_BLOCK | A massive assemblage of material, usually in the form of concrete logs or blocks, positioned alongside a transportation route, ready to be activated as a potential barrier to an advancing enemy ground force, when needed. | EC ROLLING_BLOCK | 761 |
| ROUNDHOUSE | A circular building for housing and switching locomotives or cars/carriages. | EC RAILROAD, EC ROUNDHOUSE | 762 |
| ROUTE_MARKER | An emblem used to designate a road's name or identifying number, and its associated sign. | 763 | |
| ROUTE_SHOULDER | An adjacent strip of land along either side of a road or runway not normally used by vehicles or aircraft, but provided as an allowable margin in case of emergencies. | 764 | |
| ROWHOUSE | One of a series of essentially identical residential buildings situated side by side and joined by common walls. | EC APARTMENT_HOUSE, EC MULTI_UNIT_DWELLING | 765 |
| RUINS | The deteriorated remains of an unspecified structure. | EC ARCHAELOGICAL_SITE | 766 |
| RUNWAY | A defined tract of land, usually rectangular, used for the conventional landing and take-off of aircraft, excluding the overrun and stopway. | EC AIRFIELD, EC AIRPORT, EC RUNWAY_OVERRUN, EC RUNWAY_STOPWAY | 767 |
| RUNWAY_MARKINGS | Markings placed on the runway, which are used to define and outline runway regions such as perimeters, centrelines and taxiways in order to guide aircraft while on the ground; and to provide guidance to aircraft on approach for landing. | EC RUNWAY | 768 |
| RUNWAY_OVERRUN | In military aviation exclusively, a stabilized or paved tract of land immediately beyond the end of a runway, of the same width as the runway plus shoulders, centred on the extended runway centerline. | EC RUNWAY, EC RUNWAY_STOPWAY | 769 |
| RUNWAY_OVERRUN_OR_STOPWAY | A tract of land beyond the take-off runway designated as able to support an airplane during an aborted take-off. May be further delineated specifically as EC RUNWAY_OVERRUN or EC RUNWAY_STOPWAY. | EC AIRFIELD, EC AIRPORT, EC RUNWAY | 770 |
| RUNWAY_RADAR_REFLECTOR | A device, normally placed near the threshold of a runway, used for reflecting radar signals. | EC RUNWAY | 771 |
| RUNWAY_STOPWAY | A tract of land immediately beyond the takeoff runway no less wide than the runway and centred upon the extended centerline of the runway, able to support the airplane during an aborted takeoff, without causing structural damage to the airplane, and designated by the airport authorities for use in decelerating the airplane during an aborted takeoff. | EC RUNWAY, EC RUNWAY_OVERRUN | 772 |