This standard specifies the classification and code of basic land information data, which is used to identify basic land information in digital form and ensure the consistency of its storage and exchange. This standard applies to the collection, storage, retrieval, analysis, output and exchange of basic land information by various resource and environmental information systems. This standard should also be followed when conducting digital mapping and compiling and updating maps in digital form. GB/T 13923-1992 Classification and code of basic land information data GB/T13923-1992 Standard download decompression password: www.bzxz.net
This standard specifies the classification and code of basic land information data, which is used to identify basic land information in digital form and ensure the consistency of its storage and exchange. This standard applies to the collection, storage, retrieval, analysis, output and exchange of basic land information by various resource and environmental information systems. This standard should also be followed when conducting digital mapping and compiling and updating maps in digital form.

National Standard of the People's Republic of China
Classify and codes to the
national land information
1 Subject content and scope of application
1.1 Subject content
GB/T13923-92
This standard specifies the classification and codes to the
national land information data, which are used to identify the national basic information in digital form and ensure the consistency of its storage and exchange.
1.2 Scope of application
This standard is applicable to the collection, storage, retrieval, analysis, output and exchange of national basic information by various resource and environmental information systems. This standard should also be followed when conducting digital mapping and compiling and updating maps in digital form. 2 Terminology
2.1 Basic land information
Basic natural and social information on the earth's surface. This standard mainly refers to the information represented on the survey control points and the national basic scale series of topographic maps. It can be used for basic national conditions analysis and as a three-dimensional space carrier of professional information. It can also be used to compile or update topographic maps and thematic maps.
3 Classification and coding principles
This standard adopts linear classification method and classifies national basic information data according to the following principles. 3.1 Scientificity and systematicity
With the goal of being suitable for the application and screening of modern computer and database technology, strict scientific classification is carried out according to the attributes or characteristics of national basic information to form a systematic classification system.
3.2 Relative stability
The classification system is based on the most stable attributes or characteristics of each element and can remain unchanged for a long time. 3.3 Not limited by the scale of topographic maps
The same element has a consistent classification code in map databases of different scales. The classification is not fixed. Corresponding to topographic map elements of various scales, each type of cartographic symbol has a corresponding code. 3.4 Integrity and scalability
The classification reflects both the attributes of the elements and the relationship between the elements, and has integrity. The code structure leaves appropriate room for expansion. 3.5 Applicability
Classification names should follow customary names as much as possible to avoid confusion of concepts. Codes should be as short and easy to remember as possible. Coding method
Land basic information data is divided into nine categories, which are further divided into subcategories, primary and secondary categories. The classification code consists of a six-digit code, which was approved by the State Administration of Technical Supervision on December 8, 1992 and implemented on July 1, 1993
The structure is as follows:
Class code
GB/T 13923---92
Level code
Secondary code
Identification bit
The major category code, subcategory code, primary code and secondary code are arranged in numerical order. The identification bit is defined by the user for expansion. It is usually "0".
5 Classification code table
Surveying control point
Plane control point
Earth origin
Triangulation point
Traverse point
Elevation control point
Watershed origin
Leveling point
Other control points
Astronomical point
Astronomical main point
Gravity point
Benchmark point
Generation point
Encryption point
GPS point
Multi-point
GB/T 13923—92
Other basic control points
Small triangulation points
Burial stone mapping points
Perennial river
Single-line river
Left half of double-line river
Right bank of double-line river
Seasonal riverbZxz.net
Single-line seasonal river
Left bank of double-line seasonal river
Right bank of double-line seasonal river
Disappearing river section
Disappearing river section of single line
Left bank of double-line disappearing river section
Right bank of double-line disappearing river section
Underground river section
GB/T 13923—92
Underground river section population
Canal, channel
Main channel
Above ground
General channel
Above ground
Abandoned ditch bridge
Water transmission tunnel (river)
Water transmission aqueduct
Perennial lake
Talk about water tide
Weishui Lake
Kushui Lake| |tt||Seasonal lake
Freshwater lake
Saltwater lake
Bitterwater lake
Water conservancy facilities
Reservoir under construction
Water outlet of reservoir
Spillway of reservoir
Left bank of spillway of reservoir
Right bank of spillway of reservoir
Main dike
Inner dike top
Outer dike top
GB/T 13923-92
Inner side embankment slope foot line
Outer side embankment slope foot line
General embankment
Water gate that can be used for traffic
Water gate that cannot be used for traffic
Dredging dam
Water retaining dam
Inner side slope top
Outer side slope top
Inner dam slope foot line
Outer dam slope foot line
Breakwater, water control dam
Reinforced bank
Ouerjing
Abandoned karez
Geothermal wells, geothermal pools
Artesian wells
Fish ponds in base pond areas
Reservoirs
Purification pools
Flood areas (flood diversion areas))
Other water system elements
Jianhuanquan
Water beaches
Steep banks with beaches
Steep banks without beaches
Commercial water boundaries
Marine elements
Coastline
Dry beaches
CB/T 13923—92
Sand and gravel beaches
Rock beaches
Coral beaches
Mud beaches
Sand and mud beaches
Mangrove beaches
Shellfish breeding beaches
GB/T 13923--92
River channel in dry beach
Tidal channel
Dangerous shore
Single
Single
Single
Coral reef
Aquaculture farm
Supplementary description of water system
Bottom annotation positioning point
River width and river depth position
River flow direction
General river
Tidal river
Tidal flow direction
Sea current flow direction
January sea current
July sea current
Water depth point
Isobath
GB/T 13923—92
Local average sea level
Residential area
Residential administrative level
Provincial, Baizhi District, Zhenxi City Government Seat
Provincial City (Prefectural-level City) Government Seat
Regional, Autonomous Prefecture, League Government Seat
City District, Prefectural City (County-level City) Government SeatCounty, Autonomous County, Banner Government Seat
Provincial Administrative Unit Government Seat
Town Government Seat|| tt||Township government seat
Residential areas below the township level
Residential buildings of government-enterprise integration units (agriculture, forestry, pasture, etc.)
High-rise building area
Scattered buildings
Common houses (independent houses, scattered houses)
Protruding houses
High-rise buildings
Damaged houses
Caves on the ground
Moss caves under the ground
Yurts, pastoral tents.Grazing point
Special buildings
Electrified railway
In construction
Ordinary railway
In construction
Narrow gauge railway
In construction
GB/T13923—92
Light rail, cableway
Aerial ropeway
Locomotive turntable
Signal lights, columns
Platform position and unknown vehicle Station
Expressway
Under construction
Planned
Surveyed
First-class highway
Under construction
Planned
Surveyed
Second-class highway
Under construction
Third-class highway
Under construction
Fourth-class highway
Under construction
Other highways||tt ||In construction
GB/T13923—92
Main highway (ordinary highway)\
In construction
General highway (simple highway)\)
In construction
Special highway
Urban road
Urban expressway
Urban trunk road
Urban secondary road
Urban branch line
Other in the city Road
Truck road, tractor road
Village road
Seasonal road, unfixed road
Mountain (pass)
Milestone
Main structures of railway and highway
Railway bridge
Highway bridge
Special bridge
Note: 1) The newly formulated national basic scale topographic map has quoted the national standard GB919-89. Highways are divided according to technical grades. Considering that the highways on the existing maps in my country are all classified according to comprehensive indicators, this category is temporarily retained, and the code
GB/T 13923—92
Railway-highway dual-purpose bridge
Upper approach bridge
Lower approach bridge
Overpass
Pedestrian bridge
Suspension bridge
Railway tunnel
Highway tunnel
Underwater tunnel
Navigation area level
Navigation station (tail navigation station)
Communication station (communication and navigation station)
International shipping route
Navigation Departure point
Route distance
Domestic (inland river, coastal) route
Navigation starting and ending points
Route one-way
Waterway grade
Navigation facilities
Ship lift
Navigation aids
Lighthouse, light pole
Signal station
Mooring buoy
Windling station
International trade port
Shore-side wharf
GB/T 13923—92
Breakwater (dug-in) pier
Floating pier
Breakwater
Passenger station
Shoresidence pier
Floating pier
Passenger station
Train ferry
Car ferry
Passenger ferry (people ferry
Walking field
Port channel
Airport
Airline
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