Survey Control Information System

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

   Survey Division, Highways Department, Government of the Hong Kong Special Administrative Region, 20110706, Survey Control Information System: Database for Survey Control Information System continual updating, no issue information, Survey Division, Highways Department, Government of the Hong Kong Special Administrative Region, Hong Kong Special Administrative Region.

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?

   Beginning_Date: 2000

   Ending_Date: Present

   Currentness_Reference: Date of survey

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

   Geospatial_Data_Presentation_Form: digital data, tabular digital data and photo data

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. It contains the following vector data types (SDTS terminology):

      • G-polygon

   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 coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.001
      Ordinates (y-coordinates) are specified to the nearest 0.001
      Planar coordinates are specified in meters

      The horizontal datum used is Hong Kong 1980 Grid Datum.
      The ellipsoid used is International Hayford 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?

   HYDCLASSA

   Highways SCIS Class A Control Station (Source: Survey Division, Highways Department)

   FID

   Internal feature number in ESRI Shapefile format. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   DEPARTMENT

   Name of Data Creator Department. (Source: Survey Division, Highways Department.)

   Value	Definition
   H	Highways Department.

   SECTION

   Name of Survey Sections. (Source: Highways Department.)

   Value	Definition
   Q	Headquarters.
   H	Hong Kong (Old System).
   E	Kowloon East (Old System).
   W	Kowloon West (Old System).
   N	New Territories North (Old System).
   M	Major Works Project Management Office.
   S	New Territories South (Old System).
   C	Contractors in Major Works¡¦ Project.
   B	NT Region Survey Section.
   U	Urban Region Survey Sections.
   A	Works Survey Section.
   R	Railway Development Office.
   T	Task Force Unit.

   STN_NO

   Survey Control Station Number. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   CATEGORY

   Control Station Category. (Source: Survey Division, Highways Department.)

   Value	Definition
   33	Horz=High Order/Vert=High Order.
   32	Horz=High Order/Vert=Regular Order.
   31	Horz=High Order/Vert=Low Order.
   30	Horz=High Order/Vert=Not Surveyed.
   23	Horz=Regular Order/Vert=High Order.
   22	Horz=Regular Order/Vert=Regular Order.
   21	Horz=Regular Order/Vert=Low Order.
   20	Horz=Regular Order/Vert=Not Surveyed.
   13	Horz=Low Order/Vert=High Order.
   12	Horz=Low Order/Vert=Regular Order.
   11	Horz=Low Order/Vert=Low Order.
   10	Horz=Low Order/Vert=Not Surveyed.
   03	Horz=Not Surveyed/Vert=High Order.
   02	Horz=Not Surveyed/Vert=Regular Order.
   01	Horz=Not Surveyed/Vert=Low Order.
   00	Horz=Not Surveyed/Vert= Not Surveyed.

   HK80_NORTH

   Northing of control station in meter. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   HK80_EAST

   Easting of control station in meter. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   HKPD_LEVEL

   Height of the marks in meter above Hong Kong Principal Datum. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   MONU_TYPE

   Type of station marker. (Source: Survey Division, Highways Department.)

   Value	Definition
   Beacon	Beacon.
   CM	Cut Mark.
   BR	Brass Rod.
   EBM	Engineer Bench Mark.
   ESN	Engineer Survey Mark.
   IS	Iron Spike.
   IT	Iron Tube.
   LP	Lead Plug.
   NAIL	NAIL.
   PB	Picket Box.
   PEG	Peg.
   SSR	Stainless Steel Rod.
   Staple	Staple.
   USM	Urban Survey Mark.

   SKETCH

   Reference diagram or station sketch. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   SVY_COMPLE

   Date of survey completed and approved (dd/mm/yy). (Source: Survey Division, Highways Department.)

   Value	Definition
   Date	Date.

   FORMER_NAM

   The old name of the current control station. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   LOCALITY

   A place name or street name where the control station is located. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   DSO

   Name of District Survey Office where the control station is located. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   SHT_NO

   Survey Sheet No. of 1:1000 series. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   LOST_CONDI

   Current Status of the survey mark (missing/disturbed/re-valued/blank). (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   REMARK

   A verbal description of the access route. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   HYDCLASSB

   Highways SCIS Class B Control Station (Source: Survey Division, Highways Department)

   FID

   Internal feature number in ESRI Shapefile format. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   DEPARTMENT

   Name of Data Creator Department. (Source: Survey Division, Highways Department.)

   Value	Definition
   H	Highways Department.

   SECTION

   Name of Survey Sections. (Source: Highways Department.)

   Value	Definition
   Q	Headquarters.
   H	Hong Kong (Old System).
   E	Kowloon East (Old System).
   W	Kowloon West (Old System).
   N	New Territories North (Old System).
   M	Major Works Project Management Office.
   S	New Territories South (Old System).
   C	Contractors in Major Works¡¦ Project.
   B	NT Region Survey Section.
   U	Urban Region Survey Sections.
   A	Works Survey Section.
   R	Railway Development Office.
   T	Task Force Unit.

   STN_NO

   Survey Control Station Number. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   CATEGORY

   Control Station Category. (Source: Survey Division, Highways Department.)

   Value	Definition
   33	Horz=High Order/Vert=High Order.
   32	Horz=High Order/Vert=Regular Order.
   31	Horz=High Order/Vert=Low Order.
   30	Horz=High Order/Vert=Not Surveyed.
   23	Horz=Regular Order/Vert=High Order.
   22	Horz=Regular Order/Vert=Regular Order.
   21	Horz=Regular Order/Vert=Low Order.
   20	Horz=Regular Order/Vert=Not Surveyed.
   13	Horz=Low Order/Vert=High Order.
   12	Horz=Low Order/Vert=Regular Order.
   11	Horz=Low Order/Vert=Low Order.
   10	Horz=Low Order/Vert=Not Surveyed.
   03	Horz=Not Surveyed/Vert=High Order.
   02	Horz=Not Surveyed/Vert=Regular Order.
   01	Horz=Not Surveyed/Vert=Low Order.
   00	Horz=Not Surveyed/Vert= Not Surveyed.

   HK80_NORTH

   Northing of control station in meter. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   HK80_EAST

   Easting of control station in meter. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   HKPD_LEVEL

   Height of the marks in meter above Hong Kong Principal Datum. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   MONU_TYPE

   Type of station marker. (Source: Survey Division, Highways Department.)

   Value	Definition
   Beacon	Beacon.
   CM	Cut Mark.
   BR	Brass Rod.
   EBM	Engineer Bench Mark.
   ESN	Engineer Survey Mark.
   IS	Iron Spike.
   IT	Iron Tube.
   LP	Lead Plug.
   NAIL	NAIL.
   PB	Picket Box.
   PEG	Peg.
   SSR	Stainless Steel Rod.
   Staple	Staple.
   USM	Urban Survey Mark.

   SKETCH

   Reference diagram or station sketch. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   SVY_COMPLE

   Date of survey completed and approved (dd/mm/yy). (Source: Survey Division, Highways Department.)

   Value	Definition
   Date	Date.

   FORMER_NAM

   The old name of the current control station. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   LOCALITY

   A place name or street name where the control station is located. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   DSO

   Name of District Survey Office where the control station is located. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   SHT_NO

   Survey Sheet No. of 1:1000 series. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   LOST_CONDI

   Current Status of the survey mark (missing/disturbed/re-valued/blank). (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   REMARK

   A verbal description of the access route. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   HIGHWAYS-PHOTO-CTR

   Highways Photo Control Point In Shapefile format (Source: Survey Division, Highways Department.)

   FID

   Internal feature number. (Source: ESRI Shapefile)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI Shapefile)

   Coordinates defining the features.

   CARD_ID

   CARD ID Number. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   HK80_EAST

   Easting of photo control point in meter. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   HK80_NORTH

   Northing of photo control point in meter. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   Z

   Reduced level of photo control point above Hong Kong Principal Datum. (Source: Survey Division, Highways Department.)

   Value	Definition
   Number with decimal places	Number.

   CARD_FRONT

   Card Front. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   CARD_BACK

   Card Back. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   PHOTO

   Image file name of related photo. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   PHOTO_DATE

   Date of photo. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   MISSING_DA

   Date of missing. (Source: Survey Division, Highways Department.)

   Value	Definition
   Date	Date.

   HK80_DATUM

   Hong Kong 1980 Grid Datum. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

   REMARK

   Remark. (Source: Survey Division, Highways Department.)

   Value	Definition
   String	String.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Survey Division, Highways Department, Government of the Hong Kong Special Administrative Region

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Survey Division, Highways Department, Government of the Hong Kong Special Administrative Region
   Attn: Senior Land Surveyor/Technical & Quality, Highways Department.
   10/F, Tower 1, Cheung Sha Wan Plaza
   Hong Kong, Hong Kong Special Administrative Region None
   People's Republic of China
   

   +852-23702934 (voice)
   +852-23108985 (FAX)
   slstq.sur@hyd.gov.hk
   

   Hours_of_Service: 8:30 - 17:00 (Monday to Friday)

Why was the data set created?

To store, retrieve and query survey control information.

How was the data set created?

1. From what previous works were the data drawn?

   None (source 1 of 1)

   Survey Sections, Highways Department, Government of the Hong Kong Special Administrative Region., 2011, Survey Control Data.: Survey Control Data. continual updating, no issue information., Highways Department., Hong Kong Special Administrative Region..

   Type_of_Source_Media: ground survey.

   Source_Scale_Denominator: 1000

   Source_Contribution: survey control data.

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

   Date: Unknown (process 1 of 1)

   Inapplicable

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 conducting a sampling test to ensure that the attributes after loading are the same as the original attributes for each test case.

2. How accurate are the geographic locations?

   varies

3. How accurate are the heights or depths?

   varies

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

   All latest available data is uploaded on the system

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

   ESRI ArcView will check and maintain the linkage and integrity between the graphical and textual data.

How can someone get a copy of the data set?

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

Access_Constraints:

The digital data is copyrighted by the Government of the Hong Kong Special Administrative Region and they are for internal use of Highways Department.

Use_Constraints:

Copyright should be observed and the data cannot be released to other parties without the written agreement from Highways Department.

Who wrote the metadata?

Dates:

Last modified: 06-Jul-2011

Metadata author:

Survey Division, Highways Department, of the Hong Kong Special Administrative Region
Attn: Senior Land Surveyor/Technical & Quality, Highways Department
10/F, Tower I, Cheung Sha Wan Plaza
Hong Kong, Hong Kong Special Administrative Region None
People's Republic of China

+852-23702934 (voice)
+852-23108985 (FAX)
slstq.sur@hyd.gov.hk

Metadata standard:

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