Computerized Slope Registration and Location Plan System (CSRLP)

Metadata also available as - [Outline]

Frequently anticipated questions:

What does this data set describe?

Title:
Computerized Slope Registration and Location Plan System (CSRLP)
Abstract:
The CSRLP system maintains a digital map database as an up-to-date registrar of all registered slope features in the Hong Kong Territories. This dataset contains attributes of slope features which are identified as cut slope, cut slope with retaining wall, fill slope, fill slope with retaining wall, retaining wall, disturbed terrain, natural terrain with stabilization measures and natural terrain with defence measures. Slope Location Plans (SLP) are the graphical presentations of the registered slopes in digital form and record the shapes and locations of the slope features. Basemap information in the SLPs are supplied by the Land Information Centre (LIC) of the Lands Department.
  1. How might this data set be cited?
    Survey Division, Civil Engineering & Development Department, 200704, Computerized Slope Registration and Location Plan System (CSRLP): Master Location Plan None, Civil Engineering & Development Department, Hong Kong.

    Online Links:

    • No online linkage

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: 113.825
    East_Bounding_Coordinate: 114.408
    North_Bounding_Coordinate: 22.572
    South_Bounding_Coordinate: 22.138
  3. What does it look like?
    The 1:5000 series survey sheets' naming convention as adopted by the Survey and Mapping Office (SMO) of the Lands Department with extension. SLP makes up the syntax of the file names. (ArcMap 'FGDB' format.)
    The file contains all registered slope features being identified by polygons with different colours according to their types. Their associated slope numbers are annotated also.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: Jun-2011
    Currentness_Reference:
    Publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Annotated Vector Map
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set.
    2. What coordinate system is used to represent geographic features?
      The map projection used is Transverse Mercator.
      Projection parameters:
      False_Easting: 836694.05
      False_Northing: 819069.80
      Latitude_of_Projection_Origin: 22.3121333
      Longitude_of_Central_Meridian: 114.1785554
      Scale_Factor_at_Central_Meridian: 1.0
      Planar coordinates are encoded using distance and bearing
      Planar coordinates are specified using distance and bearing values. Resolution of distance values: 1
      Resolution of bearing values: 0.0002778
      Bearing is specified in units of Degrees and decimal minutes
      Bearing is measured North
      Bearing is measured from the Magnetic meridian
      Planar coordinates are specified in Millimeters
      The horizontal datum used is Hong Kong 1980 Geodetic Datum.
      The ellipsoid used is International 1924.
      The semi-major axis of the ellipsoid used is 6378388.
      The flattening of the ellipsoid used is 1/297.0.
  7. How does the data set describe geographic features?
    Slope Registrar (SLOPE)
    The slope registrar stores textual information of slopes such as the feature type, the 1:5000 series survey sheet no. where it refers, date of registration, the slope status, and the coordinates of the centroid of the slope polygon. (Source: CSRLP System Slope Master Table)
    OBJECTID
    Internal feature number. (Source: Esri) Unique positive integer
    SLOPE_ID
    An identity number indicates the slope within the CSRLP system. (Source: CSRLP System Slope Master Table)
    Range of values
    Minimum:1
    Maximum:999999
    SLOPE_NO
    Unique identifier for every single slope polygon (Source: CSRLP System Slope Master Table) -
    STATUS
    Status of the slope that identifies whether it is current and approved or deleted. (Source: CSRLP System Slope Master Table)
    ValueDefinition
    CCurrent and approved
    DDeleted
    S5K_NO
    Survey sheet number of 1:5000 series. (Source: CSRLP System Slope Master Table)
    ValueDefinition
    Naming convention of 1:5000 survey sheet series.-
    FEATURE_TYPE
    Feature type of the slope as identified. The type forms part of a valid slope number. (Source: CSRLP System Slope Master Table)
    ValueDefinition
    CCutt Slope
    FFill Slope
    RRetaining Wall
    DTDisturbed Terrain
    NSNatural Terrain with Stabilisation Measures
    NDNatural Terrain with Defence Measures
    FEATURE_SUBTYPE
    Feature subtype defines, if feature type is either 'C' or 'F', whether the feature type is attached to a retaining wall. It forms part of a valid slope no. (Source: CSRLP System Slope Master Table)
    ValueDefinition
    R-
    FEATURE_NO
    A sequential number indicates the slope feature number within a slope feature type. (Source: CSRLP System Slope Master Table)
    Range of values
    Minimum:1
    Maximum:999999
    REG_DATE
    Date when the slope is registered. (Source: CSRLP System Slope Master Table) -
    TAG_X
    Easting coordinate of centroid of the slope feature. (Source: CSRLP System Slope Master Table)
    Range of values
    Minimum:800000
    Maximum:875000
    TAG_Y
    Northing coordinate of centroid of the slope feature. (Source: CSRLP System Slope Master Table)
    Range of values
    Minimum:800000
    Maximum:848000
    SHAPE
    Feature geometry. (Source: Esri) Coordinates defining the features
    SHAPE.AREA
    Area of feature in internal units squared. (Source: Esri) Positive real numbers that are automatically generated.
    SHAPE.LEN
    Length of feature in internal units. (Source: Esri) Positive real numbers that are automatically generated.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
    The Land Information Centre of Lands Department provides topographic basemaps to the graphic files.
  3. To whom should users address questions about the data?
    Survey Division, Civil Engineering & Development Department
    Senior Land Surveyor / Geo Engineering
    7/F, Survey Division, South Tower, West Kowloon Government Offices, 11 Hoi Ting Road, Yau Ma Tei, Kowloon
    Hong Kong, Hong Kong Special Administrative Region
    The People's Republic of China

    (852) 3842 7313 (voice)
    (852) 2714 0174 (FAX)
    slsge.svy@cedd.gov.hk
    Hours_of_Service: 0900 Hrs to 1745 Hrs

Why was the data set created?

The CSRLP system provides easy search and inspection of the existing slope location by internal staff.

How was the data set created?

  1. From what previous works were the data drawn?
    MLP (source 1 of 2)
    Survey Division, Civil Engineering & Development Department, Unknown, Master Location Plan: Civil Engineering & Development Department, Hong Kong.

    Online Links:

    • None

    Type_of_Source_Media: Paper maps, textual records and digital files of slope map
    Source_Scale_Denominator: 1000
    Source_Contribution:
    Paper maps and textual records from which spatial and attribute information are interpreted.
    None (source 2 of 2)
    Slope Safety Division, Civil Engineering & Development Department, Unknown, Proposed slope location: Civil Engineering & Development Department, Hong Kong.

    Type_of_Source_Media: Paper maps, textual records and digital files of slope map
    Source_Scale_Denominator: 1000
    Source_Contribution:
    Paper maps and textual records from which spatial and attribute information are interpreted.
  2. How were the data generated, processed, and modified?
    Date: Apr-2007 (process 1 of 1)
    All slope boundaries are stored in Oracle database. New slope and any amendment of existing slope will input into the system's database via ArcMap. Graphic linking between each textual record and its associated graphic elements was established by the in-house customized programme of CSRLP. Person who carried out this activity:
    Survey Division, Civil Engineering & Development Department
    -
    Data sources used in this process:
    • CSRLP
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Attribute accuracy is checked by manual comparison of the hard copy plots with the source. In addition, CSRLP customized software tests the spatial data against a master set of valid slope attributes.
  2. How accurate are the geographic locations?
    Horizontal positional accuracy for the digital data is checked by visual comparison of hard copy plots with the source.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    All registered slopes are included.
  5. How consistent are the relationships among the observations, including topology?
    When building topology, all slope boundaries are closed polygons. All slopes' centroid must be enclosed by their associated polygons. Every polygon is associated with an annotation box pointing to it. Annotation texts indicating slope numbers have to be placed inside the boxes. Each polygon is associated with an unique slope number.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints:
Hardcopy browse graphic and digital data are for internal use only
Use_Constraints: None
  1. Who distributes the data set? (Distributor 1 of 1)
    Survey Division, Civil Engineering & Development Department
    7/F, Survey Division, South Tower, West Kowloon Government Offices, 11 Hoi Ting Road, Yau Ma Tei, Kowloon
    Hong Kong, Hong Kong Special Administrative Region
    The People's Republic of China

    (852) 3842 7313 (voice)
    (852) 2714 0174 (FAX)
    slsge.svy@cedd.gov.hk
  2. What's the catalog number I need to order this data set?
    Oracle export file in text format
  3. What legal disclaimers am I supposed to read?
    none
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    none

Who wrote the metadata?

Dates:
Last modified: 01-Jun-2016
Last Reviewed: 08-Jan-2024
Metadata author:
Survey Division, Civil Engineering & Development Department
7/F, Survey Division, South Tower, West Kowloon Government Offices, 11 Hoi Ting Road, Yau Ma Tei, Kowloon
Hong Kong, Hong Kong Special Administrative Region
The People's Republic of China

(852) 3842 7325 (voice)
(852) 2714 0174 (FAX)
lsgi.svy@cedd.gov.hk
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Generated by mp version 2.9.50 on Wed Jan 10 11:10:11 2024