1 Scope
This standard specifies the data requirements of holographic location maps, the form of location expression and the content of location frame data.
This standard applies to the organization and production of holographic location map data.
2 Normative reference documents
The following documents are essential for the application of this document. Where the reference document is dated, only the dated version is applicable to this document
Where the reference document is not dated, its latest version (including all the revision sheets) applies to this document.
GB/T 19710- 2005 Geographic Information Metadata
GB 22021, National Basic Technical Provisions for Heaven and Earth Survey
CH/T8024 Technical Specification for Airborne LiDAR Data Acquisition
CH/T9015 Specification for three-dimensional geographic information model data products
CH/T 9016 Three-dimensional geographic information model production specifications
CH/T9017 Specification for three-dimensional geographic information model database
3 terms and definitions
This figure hides
The following terms and definitions are applicable to this document.
3.1
Holographic location map holo-graphic location-based map
A form of map organization in which various types of information with direct and indirect location references or location marker objects are related by location.
Note: It supports the aggregation and fusion of location-based information by means of a map space-oriented location index.
3.2
Location
The geometric space that a point, or an object or person may occupy.
3.3 location
direct location
A location described by a set of coordinates in a coordinate reference system.
3.4
Indirect location
Indirect location
A location that cannot be described by a - set of coordinates in the coordinate reference system.
3.5
Location information
Information with a spatial location reference or location marker, consisting of three parts: location, time and information entity.
Note: Location refers to the spatial unit where the information entity is located, and time indicates the temporal characteristics of the birth, release and evolution of the information entity.
3.6
Information entity
information entity
A collection of information of an object.
Note: The main presentation form of information entity is text, graphics, pictures, audio, video, etc., encapsulated in a - certain digital media, which can be obtained from the Internet according to the Uniform Resource locator URI.
3.7
Location framework
location framework
The location information is located in the map space of the location carrier, and its positioning means refers to the location of the location information in a map space.
The technical means to place the location in the corresponding spatial unit in a map space.
3.8
two-dimensional map
two-dimensional map
A map that is stored in digital form according to the two-dimensional data organization method.
3.9
Three-dimensional map
three-dimensional map
A map that is stored in digital form according to the three-dimensional data organization method.
3.10
image map
photo map; image map
A map based on aerial or space remote sensing images, geometrically corrected, with line drawing and a few notes, and the mapping object
map on the map surface.
[GB/T 16820- 2009, Definition 7.94]
3.11
real scene image
A near-ground image that is consistent with the visual perception of the human eye and reflects the real spatial relationships, time, and human and social environmental information of a geographical scene.
digital image.
[GB/T 35628- 2017, Definition 3.1]
3.12
Single image
An image taken with a single field of view.
[GB/T 35628- 2017. Definition 3.6]
4 Holographic location map data requirements
4.1 Data composition
Holographic location map data includes: location information, location frame data and metadata.
4.2 Location Information
4.2.1 The location information should have valid information entity, valid time and valid location.
4.2.2
The expression of the valid location shall be of the type of its location in chapter 5.
5 Location expressions
5.1 Location expressions and classification
5.1.1 The location expression form in the holographic location map should be divided into direct location type and indirect location type, as specified in Table 1.
Among them:
a) The direct location type contains coordinate subtypes;
b) indirect location type contains geographic grid subtype, place name subtype, address subtype, postal code subtype, fixed telephone number
subtype, fixed IP subtype, and linear reference subtype.
5.1.2 The basic properties of the various location subtypes are further described in 5.2 to 5.9.
5.2 Coordinate subtypes
The coordinate subtypes contain two-dimensional coordinate subtypes and three-dimensional coordinate subtypes. Among them:
a) The basic properties of the 2D coordinate subtype are described in Table 2;
b) The basic properties of the 3D coordinate subtype are described in Table 3.
Note: The coordinate subtype is a direct position.
6 Position frame data
6.1 Classification of position frame data
6.1.1 Overview
According to the spatial characteristics of the map carrying location information, the location frame data should be divided into two-dimensional map and three-dimensional map data. Image map data, live image data and point cloud data, etc.
6.1.2 Two-dimensional map and three-dimensional map data
6.1.2.1 - General requirements
6.1.2.1.1 The specifications of the two-dimensional map should conform to the provisions of GB/T 35634. The data format should be in common format, such as shp format, etc.
6.1.2.1.2 The model classification and specification, modeling unit division and model naming, data acquisition and processing, 3D model production and data organization and management of 3D maps shall conform to CH/T 9015, CH/T 9016, CH/T 9017.
obj format, etc.
6.1.2.2 Map spatial positioning of location information
The location information is positioned on the map space by its location expression, and the specific requirements are as follows:
When the location information is expressed in the form of coordinates, or relative position based on coordinates, the location frame data in map space should contain the spatial coordinate reference system.
The spatial coordinate reference system shall be included;
6.1.3 Image map data
6.1.3.1 General requirements
The definition, content and expression of image map data, quality inspection marks, etc. conform to GB/T 33175.GB/T 33178, GB/T 33179 and GB/T 33182.
The data format adopts common formats, such as tiff format, etc.
6.1.3.2 Spatial positioning of image map of location information
The spatial coordinate reference system of the location expression form of location information should be consistent with the image map. The spatial coordinate reference system of location information should be consistent with the image map.
See Appendix A for examples of location information.
6.1.4 Live image data.
6.1.4.1 - General requirements
The basic requirements of the live image data shall conform to the provisions of GB/T 35628- 2017.
The data format should be in common format.
6.1.4.2 Spatial positioning of live images of location information
6.1.5 Point cloud data
6.1.5.1 General requirements
The density and elevation accuracy of point cloud data should conform to the provisions of CH/T 8024. The data format shall be in common format.
6.1.5.2 Spatial positioning of point cloud of location information
The spatial coordinate system of the position expression form of the position information shall be consistent with the point cloud.
6.2 Positioning mode
6.2.1 Location frame data positioning mode, should be divided into direct positioning and indirect positioning. Among them:
a) direct positioning includes coordinate positioning;
b) indirect positioning includes geographic grid positioning, place name positioning, address positioning, zip code positioning, fixed telephone number positioning, fixed IP
address positioning, linear reference positioning, etc.
1 Scope
This standard specifies the data requirements of holographic location maps, the form of location expression and the content of location frame data.
This standard applies to the organization and production of holographic location map data.
2 Normative reference documents
The following documents are essential for the application of this document. Where the reference document is dated, only the dated version is applicable to this document
Where the reference document is not dated, its latest version (including all the revision sheets) applies to this document.
GB/T 19710- 2005 Geographic Information Metadata
GB 22021, National Basic Technical Provisions for Heaven and Earth Survey
CH/T8024 Technical Specification for Airborne LiDAR Data Acquisition
CH/T9015 Specification for three-dimensional geographic information model data products
CH/T 9016 Three-dimensional geographic information model production specifications
CH/T9017 Specification for three-dimensional geographic information model database
3 terms and definitions
This figure hides
The following terms and definitions are applicable to this document.
3.1
Holographic location map holo-graphic location-based map
A form of map organization in which various types of information with direct and indirect location references or location marker objects are related by location.
Note: It supports the aggregation and fusion of location-based information by means of a map space-oriented location index.
3.2
Location
The geometric space that a point, or an object or person may occupy.
3.3 location
direct location
A location described by a set of coordinates in a coordinate reference system.
3.4
Indirect location
Indirect location
A location that cannot be described by a - set of coordinates in the coordinate reference system.
3.5
Location information
Information with a spatial location reference or location marker, consisting of three parts: location, time and information entity.
Note: Location refers to the spatial unit where the information entity is located, and time indicates the temporal characteristics of the birth, release and evolution of the information entity.
3.6
Information entity
information entity
A collection of information of an object.
Note: The main presentation form of information entity is text, graphics, pictures, audio, video, etc., encapsulated in a - certain digital media, which can be obtained from the Internet according to the Uniform Resource locator URI.
3.7
Location framework
location framework
The location information is located in the map space of the location carrier, and its positioning means refers to the location of the location information in a map space.
The technical means to place the location in the corresponding spatial unit in a map space.
3.8
two-dimensional map
two-dimensional map
A map that is stored in digital form according to the two-dimensional data organization method.
3.9
Three-dimensional map
three-dimensional map
A map that is stored in digital form according to the three-dimensional data organization method.
3.10
image map
photo map; image map
A map based on aerial or space remote sensing images, geometrically corrected, with line drawing and a few notes, and the mapping object
map on the map surface.
[GB/T 16820- 2009, Definition 7.94]
3.11
real scene image
A near-ground image that is consistent with the visual perception of the human eye and reflects the real spatial relationships, time, and human and social environmental information of a geographical scene.
digital image.
[GB/T 35628- 2017, Definition 3.1]
3.12
Single image
An image taken with a single field of view.
[GB/T 35628- 2017. Definition 3.6]
4 Holographic location map data requirements
4.1 Data composition
Holographic location map data includes: location information, location frame data and metadata.
4.2 Location Information
4.2.1 The location information should have valid information entity, valid time and valid location.
4.2.2
The expression of the valid location shall be of the type of its location in chapter 5.
5 Location expressions
5.1 Location expressions and classification
5.1.1 The location expression form in the holographic location map should be divided into direct location type and indirect location type, as specified in Table 1.
Among them:
a) The direct location type contains coordinate subtypes;
b) indirect location type contains geographic grid subtype, place name subtype, address subtype, postal code subtype, fixed telephone number
subtype, fixed IP subtype, and linear reference subtype.
5.1.2 The basic properties of the various location subtypes are further described in 5.2 to 5.9.
5.2 Coordinate subtypes
The coordinate subtypes contain two-dimensional coordinate subtypes and three-dimensional coordinate subtypes. Among them:
a) The basic properties of the 2D coordinate subtype are described in Table 2;
b) The basic properties of the 3D coordinate subtype are described in Table 3.
Note: The coordinate subtype is a direct position.
6 Position frame data
6.1 Classification of position frame data
6.1.1 Overview
According to the spatial characteristics of the map carrying location information, the location frame data should be divided into two-dimensional map and three-dimensional map data. Image map data, live image data and point cloud data, etc.
6.1.2 Two-dimensional map and three-dimensional map data
6.1.2.1 - General requirements
6.1.2.1.1 The specifications of the two-dimensional map should conform to the provisions of GB/T 35634. The data format should be in common format, such as shp format, etc.
6.1.2.1.2 The model classification and specification, modeling unit division and model naming, data acquisition and processing, 3D model production and data organization and management of 3D maps shall conform to CH/T 9015, CH/T 9016, CH/T 9017.
obj format, etc.
6.1.2.2 Map spatial positioning of location information
The location information is positioned on the map space by its location expression, and the specific requirements are as follows:
When the location information is expressed in the form of coordinates, or relative position based on coordinates, the location frame data in map space should contain the spatial coordinate reference system.
The spatial coordinate reference system shall be included;
6.1.3 Image map data
6.1.3.1 General requirements
The definition, content and expression of image map data, quality inspection marks, etc. conform to GB/T 33175.GB/T 33178, GB/T 33179 and GB/T 33182.
The data format adopts common formats, such as tiff format, etc.
6.1.3.2 Spatial positioning of image map of location information
The spatial coordinate reference system of the location expression form of location information should be consistent with the image map. The spatial coordinate reference system of location information should be consistent with the image map.
See Appendix A for examples of location information.
6.1.4 Live image data.
6.1.4.1 - General requirements
The basic requirements of the live image data shall conform to the provisions of GB/T 35628- 2017.
The data format should be in common format.
6.1.4.2 Spatial positioning of live images of location information
6.1.5 Point cloud data
6.1.5.1 General requirements
The density and elevation accuracy of point cloud data should conform to the provisions of CH/T 8024. The data format shall be in common format.
6.1.5.2 Spatial positioning of point cloud of location information
The spatial coordinate system of the position expression form of the position information shall be consistent with the point cloud.
6.2 Positioning mode
6.2.1 Location frame data positioning mode, should be divided into direct positioning and indirect positioning. Among them:
a) direct positioning includes coordinate positioning;
b) indirect positioning includes geographic grid positioning, place name positioning, address positioning, zip code positioning, fixed telephone number positioning, fixed IP
address positioning, linear reference positioning, etc.
