Identification_Information: Citation: Citation_Information: Originator: Geological Survey of Canada - Calgary Publication_Date: 200704 Title: RFGRD_V1.0 - COMPUTED REFERENCE GRIDS FOR CANADA WEST, NORTH, OFFSHORE AND DELPHI NTv2 COMPONENT Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Online linkage: http://gsc.nrcan.gc.ca/ Publication_Information: Publication_Place: Calgary, Alberta, Canada Publisher: Natural Resources Canada Other_Citation_Details: Open File 5578 Description: Abstract: Geographic reference grids are used to organize many types of spatially referenced information, including information about oil and gas exploration, development activities and lease holdings. As grid systems differ among jurisdictions, digital reference grids have been computed for British Columbia (BC Land grid); Manitoba, Saskatchewan, Alberta and the Peace River area of British Columbia (Dominion Land Survey grid); and Yukon, Nunavut and the Northwest Territories as well as Canada's offshore regions in the Atlantic, Arctic and Pacific Oceans (Canada Land grid). In addition a National Topographic System (NTS grid) has been computed for all of Canada that extends well into the offshore (40 to 84 degrees North, and 48 to 144 degrees West). Theoretically derived grids are presented as a single collection on DVD in geographic coordinates and provided in a commonly used spatial data format, ESRI SHAPE files. The NTv2 National transformation is used to convert between NAD27 and NAD83 datums. The 2 Delphi NTv2 components extend the Geomatics Canada NTv2 Developer's kit, written in FORTRAN, to Delphi developers as components that can be dropped on a form to provide conversions using the Geomatics Canada NTV2_0.GSB or MAY76V20.GSB grid shift data. Note the latter is used in some Ontario basemaps. Executables use the NTV2.bpl or MAY76.bpl run-time library. Purpose: The RFGRD_V1.0 reference grid data sets are general-purpose reference grids designed to provide polygon data in support of Geographic Information Systems applications. The grids are theoretically derived and are not intended for defining legal land ownership boundaries. The NTv2 components are designed to assist Delphi developers to make datum conversions. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 200101 Ending_Date: 999999 Currentness_Reference: Publication date Status Progress: Complete Maintenance_and_Update_Frequency: As needed RFGRD_Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -144.0 East_Bounding_Coordinate: -40.0 North_Bounding_Coordinate: 84.0 South_Bounding_Coordinate: 40.0 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Reference grids Theme_Keyword: RFGRD_V1.0 Theme_Keyword: BC Lands Theme_Keyword: Canada Lands Theme_Keyword: Dominion Land Survey Theme_Keyword: National Topographic System Theme_Keyword: DLS Theme_Keyword: NTS Theme_Keyword: Township Theme_Keyword: Range Theme_Keyword: Meridian Theme_Keyword: Sections Theme_Keyword: provincial boundaries Theme_Keyword: international boundaries Theme_Keyword: GeoGratis Theme_Keyword: GIS database Theme_Keyword: Spatial data Theme_Keyword: Vector data Theme_Keyword: Point data Theme_Keyword: SHAPE files Theme_Keyword: DXF files Theme_Keyword: DVD Theme_Keyword: NTv2 Theme_Keyword: Delphi Component Place: Place_Keyword_Thesaurus: None Place_Keyword: Canada Place_Keyword: British Columbia Place_Keyword: Alberta Place_Keyword: Saskatchewan Place_Keyword: Manitoba Place_Keyword: Yukon Place_Keyword: Northwest Territories Place_Keyword: Nunavut Place_Keyword: Canada Offshore Place_Keyword: Atlantic Provinces Place_Keyword: Offshore coverage Access_Constraints: None Use_Constraints: The grids are theoretically derived and are not intended for defining legal land ownership boundaries. This data is not to be used for legal land survey purposes. See the licence.txt file in the root area of the DVD product for details regarding the end-user agreement. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Paul Wozniak Contact_Organization: Geological Survey of Canada - Calgary Contact_Address: Address_Type: mailing address Address: 3303 33rd St. N.W. City: Calgary State_or_Province: AB Postal_Code: T2L-2A7 Country: Canada Contact_Voice_Telephone: Not Available Contact_Electronic_Mail_Address: pwozniak@nrcan.gc.ca Data_Set_Credit: D.W. Lepard, P.R.J. Wozniak, and P.H. Davenport Native_Data_Set_Environment: GISGRID program data output as DXF format processed in coverage format using Arc/Info V.7.2.1 ------------------------ Data_Quality_Information: Attribute_Accuracy: All primary attribute codes were checked against the source codes generated by the GISGRID program with no errors detected. Attribute_Accuracy_Report: Attribute codes are derived from the DXF-LAYER code of the source data by parsing that code string to populate the fields in a new table using an automated routine. The new table is joined with the Polygon Attribute Table (PAT) containing the DXF-LAYER code. A mismatch between the DXF-LAYER code and the primary field code of the new table would indicate an error. An equivalence comparison of the primary field code against the DXF-LAYER code was carried out for each polygon label with an error code generated if there was a mismatch. Each cover was then checked using the Arc/Info FREQUENCY command to check for error codes. No error codes were recorded for any of the covers. This is based on the assumption that the GISGRID program generates accurate attribute information. Logical_Consistency_Report: The data was checked for topological consistency with the Arc/Info BUILD command as a part of the automated processing. All dangles and gaps in the line work were removed. The Arc/Info command LABELERRORS was used to ensure that every polygon contained an attribute label and that no polygons contained multiple labels. The Arc/Info FREQUENCY command was used to check for unique codes using the primary field. For each cover the number of unique codes matched the number of polygons, i.e. each polygon contains a unique code. Completeness_Report: The number of points generated by the source application was compared to the number of polygon labels that exist in the processed data using the Arc/Info DESCRIBE command and found to match for all data sets. The number of polygons also matched the number of polygon labels. The data sets are complete based on the assumption that the GISGRID program generated complete grids for the designated areas. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The Horizontal Positional Accuracy is based on the calculations used by the GISGRID program (see Lineage below) to generate the vector/point data. Analysis to determine a value was not carried out. The GISGRID source application uses the NAD27 Datum to generate theoretical grids. The grids defined by latitude/longitude coordinates can be considered independent of a specified datum, i.e. they are datum neutral. These include the NTS, Canada Lands, and BC Land grid. Depending on end-user requirements, these grids can be defined as either NAD27 or NAD83 before being projected. The end-user is encouraged to check with the ministry responsible for legal surveys to determine which datum is most suitable and to acquire the actual survey data when required. The Dominion Land Survey grid is also theoretically derived but based on survey coordinates. The source datum for this set of grids is defined as NAD27 and the data must be transformed for use in a different datum. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Geological Survey of Canada - Calgary Publication_Date: 200011 Title: GISGRID Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Calgary Publisher: Natural Resources Canada Other_Citation_Details: Openfile 3105 Type_of_Source_Media: computer program Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Times: Calendar_Date: 200011 Source_Currentness_Reference: Publication dates Source_Citation_Abbreviation: GISGRID Source_Contribution: computer program generates source data, spatial and attribute, for the product data sets Process_Step: Process_Description: User input is processed by the GISGRID program to create area points bounded by intersecting strings that are written to an ASCII DXF format file using Lambert Conformal Conic Projection coordinates. The attribute data for each area is written to the DXF attribute DXF-LAYER as determined by the values of the strings bounding the area. If a finer level of detail is generated two DXF files are written; one containing only intersecting strings at a course level and a second containing only the finer level strings and all of the area points. Bounding strings for the areas are not duplicated between the course and fine files. The two files are combined when they are processed in Arc/Info. The DXF files are imported to Arc/Info coverages using the DXFARC command and checked for gaps and dangles that cannot be processed by automated routines. After initial editing the coverages are processed using automated routines written in Arc Macro Language (AML) with embedded Perl programs. These clean the data (create intersections and remove gaps and dangles), generate polygon topology, and parse the DXF-LAYER attribute codes to populate polygon attribute tables. The processed covers are projected from Lambert coordinates to Geographic (latitude and longitude) Decimal Degree coordinates. DXF SHAPE files are then created from the processed data. The SHAPE DBF files carry the attribute data from the polygon attribute table and the DXF-LAYER attribute is used to store original attribute data from the DXF files. Process_Date: 200011 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Paul Wozniak, David Lepard Contact_Organization: Geological Survey of Canada - Calgary Contact_Address: Address_Type: mailing address Address: 3303 33rd St. N.W. City: Calgary State_or_Province: AB Postal_Code: T2L-2A7 Country: Canada Contact_Voice_Telephone: (403)292-7000 Contact_Electronic_Mail_Address: pwozniak@nrcan.gc.ca, dlepard@nrcan.gc.ca Source_Information: Source_Citation: Citation_Information: Originator: University of Tennessee Publication_Date: 1995 Title: Lambert and Mercator Map Projections in Geology and Geophysics Geospatial_Data_Presentation_Form: document Publication_Information: Publication_Place: Exeter, England Publisher: Elsevier Science Ltd. Other_Citation_Details: Computers and Geosciences, An International Journal, Volume 21, Number 3, April 1995, p. 353-364 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Times: Calendar_Date: 1994 Source_Currentness_Reference: Publication dates Source_Citation_Abbreviation: Computers_&_Geosciences Source_Contribution: source code, equations and table values used for development of the GISGRID program and update of the TWP program Process_Step: Process_Description: Develop a computer program to generate reference grids in different projections and file formats for GIS applications. Process_Date: 200011 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Lepard Contact_Organization: Geological Survey of Canada - Calgary Contact_Address: Address_Type: mailing address Address: 3303 33rd St. N.W. City: Calgary State_or_Province: AB Postal_Code: T2L-2A7 Country: Canada Contact_Voice_Telephone: (403)292-7000 Contact_Electronic_Mail_Address: dlepard@nrcan.gc.ca Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1985 Title: Computer Programs for Common Map Projections Geospatial_Data_Presentation_Form: document Publication_Information: Publication_Place: Alexandria, VA, USA Publisher: US Geological Survey Other_Citation_Details: US Geological Survey Bulletin 1642 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Times: Calendar_Date: 1985 Source_Currentness_Reference: Publication dates Source_Citation_Abbreviation: USGS_Bulletin_1642 Source_Contribution: source code and equations used for development of the TWPGRID program Process_Step: Process_Description: Develop a computer program to generate reference grids in different projections for output as plot files Process_Date: 200011 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Lepard Contact_Organization: Geological Survey of Canada - Calgary Contact_Address: Address_Type: mailing address Address: 3303 33rd St. N.W. City: Calgary State_or_Province: AB Postal_Code: T2L-2A7 Country: Canada Contact_Voice_Telephone: (403)292-7028 Contact_Electronic_Mail_Address: dlepard@nrcan.gc.ca -------------------------------------- Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Township/Range/Section land survey designations. National Topographic System (NTS) map number designations. British Columbia Well Site Plan descriptions. Direct_Spatial_Reference_Method: Point and Vector ------------------------------ Spatial_Reference_Information: Geographic: Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: NAD27 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio:294.9786982 --------------------------------- Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Although line and point data are included the RFGRD_V1.0 data sets primarily contain attribute coding for polygon features. The area features represent three land survey systems, British Columbia Well Site Plan descriptions, Canada Lands Survey, and the Dominion Land Survey generated by the GISGRID program as described in the GISGRID documentation. The attribute designations have changed in the data set but corresponding values are provided in Attribute Descriptions for each data set in the DVD documentation. Attributes for the line data are the same for all grids. Entity_and_Attribute_Detail_Citation: Documentation that accompanies the GISGRID program is included in the HTML documentation for the DVD product and provides some background on attributes. Listings of the ArcInfo tables under Metadata/Attributes in the HTML documentation provide attribute details. The line data only contains two character (text) fields, SCR_DATUM - source datum GISGRID used to created the data, and GRID_TYPE - level of detail each line represents (e.g. TWP-RGE or SECTION) for display purposes. ------------------------- Distribution_Information: Distributor: Contact_Information Contact_Organization_Primary: Contact_Organization: Geological Survey of Canada - Calgary Contact_Address: Address_Type: mailing address Address: 3303 33rd St. N.W. City: Calgary State_or_Province: AB Postal_Code: T2L-2A7 Contact_Voice_Telephone: (403)292-7030 Contact_Facsimile_Telephone: (403)299-3542 Contact_Electronic_Mail_Address: gsc_calgary@nrcan.gc.ca Hours_of_Service: 0800-1200, 1300-1600 Contact_Instructions: Check http://gsc.nrcan.gc.ca/ for current information. Distribution_Liability: The digital data and software supplied in this product is under crown copyright. The crown assumes no liability for the data. Any use and interpretation is solely the responsibility of the end-user. Any references to proprietary software in the documentation, and/or any use of proprietary data formats in this release does not constitute endorsement by the Geological Survey of Canada of any manufacturer's product. [While an attempt will be made to answer questions concerning the data, there is no guaranteed level of support expressed or implied.] In accepting this software/data, the end-user undertakes to abide by the legal requirements implicit in the use of the data as outlined by the Natural Resources Canada END-USER AGREEMENT FOR DIGITAL DATA. The grid data is theoretically derived and not intended for defining legal land ownership boundaries. This data is not to be used for legal land survey purposes. Standard_Order_Process: Digital_Form: DVD Digital_Transfer_Information: Format_Name: SHAPE Format_Information_Content: spatial objects with unique identifiers for polygons Digital_Transfer_Information: Format_Name: SHAPE Format_Information_Content: spatial objects with unique identifiers for lines File_Decompression_Technique: Self-unarchiving zip files created with WinZip 9.0. WinZip is not required but the self-extracting EXE files can only be executed on Microsoft Windows 95/98/NT/2000/XP OS platforms. Microsoft Windows 3.1 and MSDOS were not tested but may be able to open the files, which are compatible with Zip 2.0 file format and can be unzipped with PKUNZIP. Compatibility_Information: Once the data sets are uncompressed the data can be moved to other platforms. Technical_Prerequisites: The SHAPE formats is an open published format that most mapping, CAD, and/or GIS packages can read. The SHAPE format has polygon attribute fields useful for querying the data. The line files have attributes included for display of grid resolutions at multiple scales. ------------------------------- Metadata_Reference_Information: Metadata_Date: 200704 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Paul Wozniak Contact_Organization: Geological Survey of Canada - Calgary Contact_Address: Address_Type: mailing address Address: 3303 33rd St. N.W. City: Calgary State_or_Province: AB Postal_Code: T2L-2A7 Country: Canada Contact_Voice_Telephone: Not Available Contact_Electronic_Mail_Address: pwozniak@nrcan.gc.ca Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 ---------------------------------