Slope Common Spatial Unit (CSU) in Data Alignment Measures for the Exchange of Planning, Lands and Public Works Data

Frequently anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  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?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
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  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Slope Safety Division, Geotechnical Engineering Office, Civil Engineering and Development Department, 200706, Slope Common Spatial Unit (CSU) in Data Alignment Measures for the Exchange of Planning, Lands and Public Works Data: Civil Engineering and Development Department (CEDD), Hong Kong.

   Other_Citation_Details:

   CEDD is the Data Agent of the Slope CSU which is responsible for the preparation of CSU data and the dissemination of data to Data Users. The Data Owners of the Slope CSU which are data source owners of CSU attributes. They are responsible to ensure the quality, completeness and accuracy of the provided data.

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?

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: Jun-2007

   Currentness_Reference: publication date

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: vector digital data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: The id of the slope feature

      This is a Point data set.

   2. What coordinate system is used to represent geographic features?

      The map projection used is Transverse Mercator.

      Projection parameters:

      Scale_Factor_at_Central_Meridian: 1.0

      Longitude_of_Central_Meridian: 114.1785554

      Latitude_of_Projection_Origin: 22.3121333

      False_Easting: 836694.05

      False_Northing: 819069.80

      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 Hayford (1910).
      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?

   BASIC_INFO

   It is the minimum information set for the slope features (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   DATA_SOURCE

   The source to provide data (Source: Slope CSU)

   Value	Definition
   Character	None

   UPDATED

   Updated data of Slope CSU data (Source: Slope CSU)

   Value	Definition
   Character	None

   LOCATION

   Location of the slope feature (Source: Slope CSU)

   Value	Definition
   Character	None

   LOCATION_CHI

   Location of the slope feature in Chinese (Source: Slope CSU)

   Value	Definition
   Character	None

   NORTH

   Map Coordinates (1980 Datum) North (Source: Slope CSU)

   Range of values
   Minimum:	800000
   Maximum:	848000
   Units:	metre
   Resolution:	1

   EAST

   Map Coordinates (1980) Easting (Source: Slope CSU)

   Range of values
   Minimum:	800000
   Maximum:	867500
   Units:	metre
   Resolution:	1

   TOE_ELV

   Elevation of the slope toe as measure at the middle of the toe(mPD) (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999.9
   Units:	metre
   Resolution:	0.1

   CONSEQ_CAT

   Consequence-to-life category if the slope feature failure. (Source: Slope CSU)

   Value	Definition
   1	Failures affecting occupied buildings or road with very heavy traffic
   2	Failures affecting heavily used open space or road with heavy traffic
   3	Failures affecting lightly used areas or road with low traffic

   TOE_DIST

   Distance from feature toe to toe facility (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999.9
   Units:	Metre
   Resolution:	0.1

   TOE_CODE

   Facility at the toe of the feature (Source: Slope CSU)

   Formal codeset
   Codeset Name:	FACILITY
   Codeset Source:	Slope CSU

   CREST_DIST

   Distance from feature crest to crest facility (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999.9
   Units:	metre
   Resolution:	0.1

   CREST_CODE

   Facility at the crest of the feature. (Source: Slope CSU)

   Formal codeset
   Codeset Name:	FACILITY
   Codeset Source:	Slope CSU

   SIFT_CLASS

   SIFT CLASS (Source: Slope CSU)

   Value	Definition
   A	Fill feature considered to have similar circumstances to the Baguio landslide site.
   B1	Fill feature meets registration criteria but does not meet criteria A and have been formed or substantially modified before 30/6/78
   B2	Fill feature meets registration criteria but does not meet criteria A and have been formed or substantially modified after 30/6/78, studied to GEO Stage 2, or equivalent or to be Housing Department feature
   C1	Cut feature meets registration criteria and have been formed or substantially modified before 30/6/78
   C2	Cut feature meets registration criteria and have been formed or substantially modified after 30/6/78, studied to GEO Stage 2, or equivalent or to be Housing Department feature

   CNPCS

   Score of the combined New Priority Classification Systems, (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999.99
   Units:	unit
   Resolution:	0.01

   CSU_STATUS

   Status of the Slope CSU life cycle. (Source: Slope CSU)

   Value	Definition
   Register	Status of a feature that is in the process of being define.
   Define	Status of a feature with complete definition and values for common attributes are complete
   Maintain	Status of a feature the has been assigned to the government departments or private sector owners for inspection and maintenance
   Deactive	Status of a feature that no longer exists or is maintained

   CSU_DATE

   Date of updating CSU status (Source: Slope CSU)

   Value	Definition
   Character	None

   FEATURE_TYPE

   Feature type of the slope feature (Source: Slope CSU)

   Value	Definition
   C	Cut Slope
   CR	Cut Slope with Retaining Wall
   F	Fill Slope
   FR	Fill Slope with Retaining Wall
   R	Retaining Wall
   DT	Disturb Terrain
   NS	Natural Terrain Stabilisation Measures
   ND	Natural Terrain Defence Measures

   MSLINK

   Unique number to link with the graphical boundary and the textual data, (Source: Slope CSU)

   Value	Definition
   Character	None

   PREP_DATE

   Data collection date by the data owner (Source: Slope CSU)

   Value	Definition
   Character	None

   CONSTRUCTION

   Entity containing construction information (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   CONSTRUCT_DATE

   Date of completion of construction/upgrading works (Source: Slope CSU)

   Value	Definition
   Character	None

   TYPE1_2

   Improved by Type 1 or 2 Prescriptive Measures (Source: Slope CSU)

   Value	Definition
   Y	Yes, with Type 1 or 2 Measures
   N	No

   TYPE3

   Improved by Type 3 Prescriptive Measures (Source: Slope CSU)

   Value	Definition
   Y	Yes, with Type 3 measures

   PRESCRIPT

   Upgraded by prescriptive design using in GEO Report No. 56 (Source: Slope CSU)

   Value	Definition
   Y	Yes, upgraded with prescriptive design
   N	No

   NPRESCRIPT

   Upgraded by non-prescriptive design including conventional design (Source: Slope CSU)

   Value	Definition
   Y	Yes, upgraded with non-prescriptive design
   N	No

   INFO_SA

   Other information - stability assessment carried out (Source: Slope CSU)

   Value	Definition
   Y	Yes, with stability assessment
   N	No

   INFO_DES

   Other information - evidence of design acceptance by GEO (Source: Slope CSU)

   Value	Definition
   Y	Yes, with evidence of design acceptance by GEO
   N	No

   REMARKS

   Remarks (Source: SLOPE CSU)

   Value	Definition
   Character	None

   REMARKS_CHI

   Remarks in Chinese (Source: Slope CSU)

   Value	Definition
   Character	None

   ND_INFO

   Entity containing information of defence measures on natural terrain (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   MEASURE_TYPE

   Type of Defence Measures (Source: Slope CSU)

   Value	Definition
   Check Dams	Using Check Dams for Defence Measure
   Earth Bunds	Using Earth Bunds for Defence Measure
   Earth Bunds	Using Boulder Fences for Defence Measure
   Others	Using Others Defence Measure to be defined in OTR_MEASURE

   LENGTH

   Length of Defence Measures (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9999
   Units:	metre
   Resolution:	1

   HEIGHT

   Maximum height of Defence Measure (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	metre
   Resolution:	1

   OTR_MEASURE

   Other type of Defence Measure (Source: Slope CSU)

   Value	Definition
   Character	None

   OTR_MEASURE_CHI

   Other type of Defence Measure in Chinese (Source: Slope CSU)

   Value	Definition
   Character	None

   FACILITY

   Lookup table for mapping the facility details of the code number stated in Toe and Crest Facility Type for the Basic_Info Entity (Source: Slope CSU)

   CODE

   Unique code number of facility (Source: Slope CSU)

   Value	Definition
   Character	None

   FAC_TYPE

   Facility type nearby the toe or crest (Source: Slope CSU)

   Value	Definition
   Character	None

   FAC_TYPE_CHI

   Facility type in Chinese nearby the toe and crest (Source: Slope CSU)

   Value	Definition
   Character	None

   Formation_API

   Entity containing the formation history of features from image interpretation on aerial photos (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   BEFORE_DATE

   The earliest known year of construction before year "YYYY" (Source: Slope CSU)

   Value	Definition
   Character	None

   AFTER_DATE

   The lastest known year for construction after "YYYY" (Source: Slope CSU)

   Value	Definition
   Character	None

   TYPE

   Modification types of slope features (Source: Slope CSU)

   Value	Definition
   Constructed	Newly constructed features
   Substantially Modified	Feature was substantially modified
   Modified	Feature was modified

   FEATURE_STATUS

   Entity indicates the latest status of slope feature. (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   STATUS

   Status of Slope Features (Source: Slope CSU)

   Value	Definition
   MB	Modified polygon
   MT	Modified feature ID
   MBT	Modified polygon and feature ID
   N	New feature ID
   D	Feature Deactivated
   TXT	Modified core textual attributes
   OTH	Modified other textual attributes

   SOURCE

   Source of data (Source: Slope CSU)

   Value	Definition
   DI	Data provided through Private owner
   EG	Change on existing slope, data provided by government department
   EP	Change on existing slope, data provided by private sector
   GN	New slope, data provided by government department
   PN	New slope, data provided by private sector

   RELEASE_DATE

   Released date of slope feature (Source: Slope CSU)

   Value	Definition
   Character	None

   MR

   Entity provides information on the party type responsible for the maintenance of the slope feature (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   INIT_PARTY

   Party initiated the slope registration (Government department / private party) (Source: Slope CSU)

   Value	Definition
   Character	None

   RESP_PARTY

   Responsible Part type (Source: Slope CSU)

   Value	Definition
   PPRI	Feature maintained by private sector
   PGVT	Feature maintained by government department
   MIX	Feature jointly maintained by government department and private sector
   PGVTMIX	Feature jointly maintained by government departments

   CEDD_DATE

   Release date of CEDD's slope data (Source: Slope CSU)

   Value	Definition
   Character	None

   LAND_DATE

   Release date of Lands Department's slope maintenance data (Source: Slope CSU)

   Value	Definition
   Character	None

   MR_PARTY

   Entity that provides information on the parties reponsible for the maintenance of the slope features (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   SUB_NO

   Identifier of apportioned slope feature for defining the slope maintenance responsibility (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	unit
   Resolution:	1

   INT_NO

   Internal reference information of maintenance responsibility responsibility boundary. (Source: Slope CSU)

   Value	Definition
   Character	None

   MR_PARTY

   Maintenance agent (Source: Slope CSU)

   Value	Definition
   Character	None

   RESP_PARTY

   Responsible parties (Government parties or lot owner who are responsible for the slope maintenance (Source: Slope CSU)

   Value	Definition
   Character	None

   PRIN_PARTY

   Principal party to take up the responsibility of the slope feature if more than one government departments (Source: Slope CSU)

   Value	Definition
   Character	None

   Endor_date

   The date of endorsing the slope maintenance responsibility (Source: Slope CSU)

   Value	Definition
   Character	None

   RENAMED_FEATURE

   Entity indicating changes of feature number (Source: Slope CSU)

   OLD_FEATURE

   Old Feature Number (Source: Slope CSU)

   Value	Definition
   Character	None

   NEW_FEATURE

   Features number renamed to (Source: Slope CSU)

   Value	Definition
   Character	None

   SLOPE_INFO

   Entity provides the detailed technical information on the slope part (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   SF_MAT

   Material Type (Source: Slope CSU)

   Value	Definition
   Soil	Soil Slope
   Rock	Rock Slope
   Soil & Rock	Soil and Rock Slope

   SF_HEIGHT

   Maximum Slope Height (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9999.9
   Units:	metre
   Resolution:	0.1

   SF_LENGTH

   Slope length (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	99999.9
   Units:	metre
   Resolution:	0.1

   SF_ANGLE

   Average Slope Angle (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	90
   Units:	degree
   Resolution:	1

   SF_BERM

   Numbers of berms (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	99
   Units:	unit
   Resolution:	1

   SF_BERMW

   Minimum width of berms (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9.9
   Units:	metre
   Resolution:	0.1

   SF_BARE

   Bare slope surface cover percentage (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	%
   Resolution:	1

   SF_CHUNAM

   Chunam slope surface cover percentage (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	%
   Resolution:	1

   SF_SHOTCRETE

   Shotcrete slope surface cover percentage (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	%
   Resolution:	1

   SF_VEGETATED

   Vegetated slope surface cover percentage (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	%
   Resolution:	1

   SF_CVR_OTHERS

   Other type of slope surface cover percentage (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	%
   Resolution:	1

   SW_SIZE

   Weep holes size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	mm
   Resolution:	1

   SW_SPC

   Weep holes spacing (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9.9
   Units:	metre
   Resolution:	0.1

   SC_CREST

   Channel at Crest size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	mm
   Resolution:	1

   SC_BERM

   Channel at berm size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	mm
   Resolution:	1

   SC_TOE

   Channel at toe size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	mm
   Resolution:	1

   SC_SLOPE

   Channel at slope size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	mm
   Resolution:	1

   SF_DOWNPIPE

   Downpipe on Slope size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	mm
   Resolution:	1

   NS_INFO

   Entity containing stabilisation measures on natural terrain (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   BOULD_BUTT

   Stabilised by Buttress (Source: Slope CSU)

   Value	Definition
   Y	Yes, with Buttress
   N	No

   BOULD_BUTT_NUM

   Total Nos. of Individual Buttress (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	unit
   Resolution:	1

   SOIL_NAIL

   Stabilised by Soil Nail (Source: Slope CSU)

   Value	Definition
   Y	Yes, with Soil Nail
   N	No

   SOIL_NAIL_NUM

   Total number of Soil Nail Installed (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	unit
   Resolution:	1

   SOIL_NAIL_LEN

   Maximum length of soil nail (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	metre
   Resolution:	1

   RAK_DRAINS

   Stabilised by Raking Drains Installed (Source: Slope CSU)

   Value	Definition
   Y	Yes, with Raking Drains installed
   N	No

   RAK_DRAINS_NUM

   Total number of raking drains installed (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	unit
   Resolution:	1

   RAK_DRAINS_LEN

   Maximum length of the raking drains (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	metre
   Resolution:	1

   OTR_MEASURE

   Stabilised by other stabilisation measures (Source: Slope CSU)

   Value	Definition
   Character	None

   OTR_MEASURE_CHI

   Stabilised by other stabilisation measures in Chinese (Source: Slope CSU)

   Value	Definition
   Character	None

   STRUCT_MEASURE

   Entity containing special structural measures upgrading the stability of the feature (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   MEASURE_TYPE

   Type of structural Measure (Source: Slope CSU)

   Value	Definition
   Soil Nails	Soil Nails installed
   Anchors	Anchors installed
   Reinforced Earth	Reinforced Earth installed
   Long Horizontal Drains	Long Horizontal Drains installed
   Rock Bolts	Rock Bolts installed
   Buttress Walls	Buttress Walls installed

   APPLY_TO

   Apply to either slope or wall part (Source: Slope CSU)

   Value	Definition
   Character	None

   OTR_MEASURE

   Other Special Measures (Source: slope CSU)

   Value	Definition
   Character	None

   OTR_MEASURE_CHI

   Others special measure in Chinese (Source: Slope CSU)

   Value	Definition
   Character	None

   WALL_INFO

   Entity containing detailed technical information on the wall part (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   WF_Location

   Location (Type) of the retaining wall (Source: Slope CSU)

   Value	Definition
   Retaining wall with level platform	Retaining wall with level platform
   Wall at crest	Retaining wall at crest of slope
   Wall at toe	Retaining wall at toe of slope
   Wall at mid-slope	Retaining wall at mid-slope

   WF_MATERIAL

   Wall Material (Source: Slope CSU)

   Value	Definition
   Random rubble	Wall made of random rubble
   Masonry	Wall made of masonry
   Gabion	Wall made of gabion
   Concrete	Wall made of concrete
   Others	Wall made of other material

   WF_HEIGHT

   Wall Height (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	99.9
   Units:	metre
   Resolution:	0.1

   WF_LENGTH

   Wall length (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	99999.9
   Units:	metre
   Resolution:	0.1

   WF_ANGLE

   Wall Face Angle (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	90
   Units:	degree
   Resolution:	1

   WF_BERM

   Number of Berms (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	99
   Units:	unit
   Resolution:	1

   WF_BERMW

   Minimum berm width (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9.9
   Units:	metre
   Resolution:	0.1

   WW_SIZE

   Weep holes size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	mm
   Resolution:	1

   WW_SPC

   Weep holes spacing (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9.9
   Units:	metre
   Resolution:	0.1

   WC_CREST

   Channel at Crest Size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9999
   Units:	mm
   Resolution:	1

   WC_TOE

   Channel at toe size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9999
   Units:	mm
   Resolution:	1

   WF_DOWNPIPE

   Down pipe on wall size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	999
   Units:	mm
   Resolution:	1

   UTILITY_SERVICE

   Entity indicating the type and magnitude of utility services on the slope features. (Source: Slope CSU)

   FEATURE

   Unique identifier of Slope CSU (Source: Slope CSU)

   Value	Definition
   Character	None

   UTIL_TYPE

   Utility Service Type (Source: Slope CSU)

   Value	Definition
   Water Main	Water main exist
   Sewer/Drain	Sewer/Drain exist
   Telecom	Telecom exist
   Cable	Cable ducting exist
   Electricity	Electricity ducting exist
   Gas	Gas ducting exist

   UTIL_SIZE

   Utiltiy service size (Source: Slope CSU)

   Range of values
   Minimum:	0
   Maximum:	9999
   Units:	mm
   Resolution:	1

   UTIL_LOCATION

   Utilty service location (Source: Slope CSU)

   Value	Definition
   On Slope	The utility located on slope
   On Crest	The utility located on crest of slope

   Entity_and_Attribute_Overview:

   The data owners are the data source owners of Slope CSU attributes.

   Entity_and_Attribute_Detail_Citation:

   The data owners are responsible to make reasonable effort to ensure the quality, completeness and currency of the provided data.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Slope Safety Division, Geotechnical Engineering Office, Civil Engineering and Development Department

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Slope Safety Division, Geotechnical Engineering Office, Civil Engineering and Development Department
   7/F, Civil Engineering and Development Building, 101 Princess Margaret Road, Homantin.
   Hong Kong, Hong Kong Special Administrative Region none
   The People's Republic of China
   

   (852) 2762 5284 (voice)
   hkss@cedd.gov.hk
   

Why was the data set created?

The Slope CSU is defined for exchange of geospatial data of slope features between departments in HKSAR Government.

How was the data set created?

1. From what previous works were the data drawn?

   Unknown (source 1 of 1)

   Survey Division, Civil Engineering and Development Department, Private Developer through Buildings Department, and Government departments which are Slope Owners, Unpublished material, None.

   Type_of_Source_Media: Paper

   Source_Scale_Denominator: 1000

   Source_Contribution:

   Paper maps and textual records form which spatial and attribute information is interpreted

2. How were the data generated, processed, and modified?

   Date: Not complete (process 1 of 1)

   Slope boundaries on paper maps were digitized and stored in MicroStation DGN format. Textual data from paper records were input into the system via standard input form. Graphic linking between each textual record and its associated graphic elements was established by using the customised programme of the CSRLP.

   Person who carried out this activity:
   

   Slope Safety Division, Geotechnical Engineering Office, Civil Engineering and Development Department
   7/F, Civil Engineering and Development Building, 101 Princess Margaret Road, Homantin .
   Hong Kong, Hong Kong Special Administrative Region None
   The People's Republic of China
   

   (852) 2762 5284 (voice)
   (852) 2762 2389 (FAX)
   hkss@cedd.gov.hk
   

   Data sources used in this process:

   • CSRLP

3. What similar or related data should the user be aware of?

   Survey Division, Civil Engineering and Development Department, 200503, Computerized Slope Registration and Location Plan System (CSRLP): Master Location Plan None, Civil Engineering and Development Department, Hong Kong.

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

1. How well have the observations been checked?

   Attribute Accuracy is tested by manual comparison of the hard copy plots with the source. Textual attributes will be submitted through standard input form and upload to the system. The system customised software test 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 tested by visual comparison of hardcopy plots with the source.

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   The coverage of Slope CSU includes six slope feature types: (a) Cut/Cut & Retaining Wall - any cut slopes and any associated retaining walls greater than 3m high. (b) Retaining Wall - any retaining wall greater than 3m high. (c) Fill/Fill & Retaining Wall - any fill slopes and any associated retaining walls greater than 5m high or which pose a direct risk to life, i.e. consequence_to_life category 1 or 2. (d) Disturbed Terrain Feature - includes repairs to landslide scars and/ or a series of composite cut and /or fill slopes where the ground surface has been disturbed, and the natural slope gradient is greater then 15 degrees. (e) Natural Terrain Stabilisation Measures - includes measures constructed on natural hillsides to prevent failure. (f) Natural Terrain Defence Measures - includes measures to contain landslide debris and hence protect buildings and infrastructure at the toe in case of landslide or boulder fall from the natural terrain above.

5. How consistent are the relationships among the observations, including topology?

   CEDD tested the logical consistency manually such as lines intersection and all slope features are closed polygon when uploaded to the system.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:

The Slope CSU data are disseminated to Data Users to departments in HKSAR Government.

Use_Constraints:

The Data Users are responsible to map the Slope CSU to their internal computer systems.

1. Who distributes the data set? (Distributor 1 of 1)
   Slope Safety Division, Geotechnical Engineering Office, Civil Engineering and Development Department
   7/F, Civil Engineering and Development Building, 101 Princess Margaret Road, Homantin, Kowloon
   Hong Kong, Hong Kong Special Administrative Region None
   The People's Republic of China
   

   (852) 2762 5284 (voice)
   (852) 2762 2389 (FAX)
   hkss@cedd.gov.hk
   

2. What's the catalog number I need to order this data set?

   ArcInfo E00, MicroStation DGN and DB4 database

3. What legal disclaimers am I supposed to read?

   none

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	DGN (version MicroStation Version 7.2)
     Media you can order:	CD-ROM (format DGN files)

     Data format:	E00
     Media you can order:	CD-ROM (format E00 Text file format)

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: Mar-2007

Metadata author:

Slope Safety Division, Geotechnical Engineering Office, Civil Engineering and Development Department
7/F Civil Engineering and Development Building, 101 Princess Margaret Road, Homantin, Kowloon
Hong Kong, Hong Kong Special Administrative Region none
The People's Republic of China

(852) 2762 5284 (voice)
(852) 2762 2389 (FAX)
hkss@cedd.gov.hk

Metadata standard:

FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)