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OVERVIEW
TITLE: A GIS dataset
of geological features for the Redfern Lake map area
(94G/5), British Columbia. FEATURE TYPE AND LOCATION INFORMATION: Points, lines,
polygons, and attributes representing the geology of the area covered by
NTS map 94G/5 in northeastern British Columbia, Canada. Bounding Coordinates: Geographic coordinates (latitude/longitude) in decimal degrees. SW Bounding Coordinate: 57.25 -124.00 SE Bounding Coordinate: 57.25 -123.50 NW Bounding Coordinate: 57.50 -124.00 NE Bounding
Coordinate: 57.50 -123.50 Platform: Desktop Computer Operating System: Microsoft Windows2000 Application:
MicroStation/J, ArcInfo 8.2 Geological
stations were positioned using uncorrected GPS NAD27 coordinates.
Coordinates were transformed to NAD83 using NTV2 software and
compilation was based on the positions of the stations. Prior to
compilation the base map data was converted from metric to Imperial
values in ArcInfo 8.2 using a conversion factor of 0.3048. This
conversion achieved consistency with Geomatics Canada hardcopy maps used
during field data collection and which were available only in Imperial
units. Projection: Universal Transverse Mercator Horizontal Datum: North American Datum 1983 Vertical Datum: Mean Sea Level Scale: 1:50
000 Distance Elevation Units: Feet Type of Media: Digital (DXF) Source Producer: Geomatics Canada Data
Acquisition Date: 1985 Original
Compilation: Geological Survey of Canada Projection: Universal Transverse Mercator Horizontal Datum: North American Datum 1983 Vertical Datum: Mean Sea Level Scale: 1:50
000 Elevation Units: Feet Production Media: Paper Source Producer: Geological Survey of Canada - Calgary Publication Date: 2001 Recommended Citation: Lane, L.S. 2001: Geology of the Redfern Lake map area (94G/5), British Columbia; Geological Survey of Canada, Open File 4172, scale 1:50 000.
LINEAGE: Geological
data was compiled from field inspection and scientific interpretation.
Independent
evaluation of the attribute and positional accuracy of the geological
data were conducted by peer review. The accuracy
of the source components that originated in the Geomatics Canada digital
files, and the geological source data digital files was maintained. This map may
contain discrepancies between feature positions located using an older
topographic base, and feature positions determined by more recent (GPS)
measurements. Inconsistencies (locally in excess of 100 metres) have
been resolved by creating a thematically consistent map (consistency
between geology and topography) while maintaining the spatial
accuracy of the outcrops (where located by GPS points). This may result
in apparent errors between the outcrop locations, and the positions of the
geological contact lines. Every effort has been made to reduce these
discrepancies while maintaining the accuracy of all source data. The Geomatics
Canada Drawing Exchange Format (DXF) files were uploaded to MicroStation/J
on a Windows2000 operating system. Geological linework was digitized
using MicroStation/J. Geological points were plotted by interfacing
MicroStation/J and a Microsoft Access2000 database. All data were edited
and finalized in ArcInfo 8.2. All data file types were created from
ArcInfo 8.2. Data are
provided in the following file types: .shp ArcView
Version 3.2 format SPATIAL DATA FILES: The data are
arranged according to the following: gel94g5 geological contacts srp94g5 orientation data stp94g5 geological stations fop94g5 fossils sap94g5 samples una94g5 geological unit polygons unl94g5 geological unit lines sel94g5 stratigraphic sections
Attributes are
defined here as the column names of the tables contained both in the ArcInfo Exchange Format (E00) and SHAPE dBase (.dbf) files. Purpose: contains the attributes of geology lines Columns: subtype Subdivision of the feature type. Examples: normal, approximate direction Directional information pertaining to asymmetric features. Example: dip direction of a fault nts_map National Topographic System designator. Example: 94G/5 Purpose: contains the attributes of points representing orientation measurements Columns: planar_id A unique identification for each planar measurement planar_typ The type of planar feature. Examples: bedding, cleavage modifier Description of the feature type. Examples: overturned, irregular strike Strike (according to the Right-Hand Rule) dip Dip
location Distance/direction from the station if measured between
stations trend Trend of linear feature (value of 999 if no measurement available) plunge Plunge of linear feature (value of 999 if no measurement available) linear_typ The type of linear feature. Examples: ripple crests, fold axis comment
Notes relating to measurement disp_ang Achieves Right-Hand Rule orientation of symbols in ArcView. Derived using the formula (270-strike) nts_map
National Topographic System designator. Example: 94G/5 Purpose: contains the attributes of points representing outcrops Columns: station_id A unique identification of each outcrop where observations were made easting UTM NAD83 easting coordinate value of the station northing
UTM NAD83 northing coordinate value of the station unit The predominant geological unit at the outcrop geologist
Observing geologist Purpose: contains the attributes of points representing fossils Columns: station_id A unique identification of each out crop where fossils were collected sample Sample number of fossil curation
Curation number of fossil northing UTM NAD83 northing coordinate value of station elevation Elevation
of the station in feet above Mean Sea Level year Year fossil was collected purpose Purpose of fossil nts_map National Topographic System designator. Example: 94G/5
TABLE sap94g5 Purpose: contains the attributes of points representing samples Columns: station_id A unique identification of each outcrop where samples were collected sample Sample number easting UTM NAD83 easting coordinate value of station northing
UTM NAD83 northing coordinate value of station lithology Lithology from which the sample was collected purpose Reason for collecting the sample nts_map National Topographic System designator. Example: 94G/5
TABLE una94g5 Purpose: contains the attributes of polygons representing geological units Columns: label Hardcopy map unit labels group Group name formation Unit name member Member name gen_descr
Unit description map area
Some formations are locally represented by lines rather than polygons, where their thicknesses are less than the 1:50 000 map resolution.
TABLE unl94g5 Purpose: contains the attributes of points representing geological units Columns: label Hardcopy map unit labels group Group name formation Unit name member Member name gen_descr Unit description map area
TABLE sel94g5
stratigraphic sections or type-localities segment A unique identification of any segments within a composite
section
Process Description: Structure
Query Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table srp94g5 Produced: srp94g5.dgn Version IV Produced: file srp94g5.dbf Process Description: in ArcView 3.2 TABLES used "add" to import the srp94g5.dbf table and with VIEW "add event theme" Table: srp94g5.dbf X Field: Easting Y Field: Northing (table columns in srp94g5.dbf). In ArcView 3.2 THEME used "convert to shape file" Produced: srp94g5.shp, srp94g5.shx, srp94g5.dbf Produced:
coverage srp94g5 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for deprojection process Produced:
coverage srp94g5 in Geographic coordinates, NAD83 Process Description: used ArcInfo ArcToolbox conversion utility Produced: srp94g5.shp,
srp94g5.shx, srp94g5.dbf Produced: file
srp94g5.e00 Process Description: Structure Query
Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table stp94g5 Process Description: Interfaced MS Access2000 and MicroStation/J utilizing ODBC driver. Plotted station symbols and identifiers utilizing custom BASIC programs. Produced: stp94g5.dgn Produced: file stp94g5.dbf Process Description: in ArcView 3.2 TABLES used "add" to import the stp94g5.dbf table and with VIEW "add event theme" Table: stp94g5.dbf X Field: Easting Y Field: Northing (table columns in stp94g5.dbf). in ArcView 3.2 THEME used "convert to shape file" Produced: stp94g5.shp, stp94g5.shx, stp94g5.dbf Produced:
coverage stp94g5 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for deprojection process Produced: coverage stp94g5
in Geographic coordinates, NAD83 Process Description: used ArcInfo ArcToolbox conversion utility Produced: stp94g5.shp,
stp94g5.shx, stp94g5.dbf Produced: file
stp94g5.e00 Process Description: Structure Query
Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table fop94g5 Process Description: Interfaced MS Access2000 and MicroStation/J
utilizing
ODBC driver. Plotted fossil symbols and identifiers utilizing custom
BASIC Produced: fop94g5.dgn Version IV Produced: file fop94g5.dbf Process Description: in ArcView 3.2 TABLES used "add" to import the fop94g5.dbf table and with VIEW "add event theme" Table: fop94g5.dbf X Field: Easting Y Field: Northing (table columns in fop94g5.dbf). In ArcView 3.2 THEME used "convert to shape file" Produced: fop94g5.shp, fop94g5.shx, fop94g5.dbf Produced:
coverage fop94g5 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for deprojection process Produced: coverage fop94g5
in Geographic coordinates, NAD83 Process Description: used ArcInfo ArcToolbox conversion utility Produced: fop94g5.shp,
fop94g5.shx, fop94g5.dbf Produced: file
fop94g5.e00 Samples Data:
Process Step: Created table containing location, identification, and Process Description: Structure Query
Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table sap94g5 Process Description: Interfaced MS Access2000 and MicroStation/J
utilizing
ODBC driver. Plotted sample symbols and identifiers utilizing custom
BASIC Produced: sap94g5.dgn Version IV Produced: file sap94g5.dbf Process Description: in ArcView 3.2 TABLES used "add" to import the sap94g5.dbf table and with VIEW "add event theme" Table: sap94g5.dbf X Field: Easting Y Field: Northing (table columns in sap94g5.dbf). In ArcView 3.2 THEME used "convert to shape file" Produced: sap94g5.shp, sap94g5.shx, sap94g5.dbf Produced:
coverage sap94g5 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for deprojection process Produced: coverage sap94g5
in Geographic coordinates, NAD83 Process Description: used ArcInfo ArcToolbox conversion utility Produced: sap94g5.shp,
sap94g5.shx, sap94g5.dbf Produced: file sap94g5.e00
Wells Data: Process Description: Structure Query
Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table wlp94g5 Process Description: Interfaced MS Access2000 and MicroStation/J
utilizing
ODBC driver. Plotted well symbols and identifiers utilizing custom
BASIC Produced: wlp94g5.dgn Version IV Produced: file wlp94g5.dbf Process Description: in ArcView 3.2 TABLES used "add" to import the wlp94g5.dbf table and with VIEW "add event theme" Table: wlp94g5.dbf X Field: Easting Y Field: Northing (table columns in wlp94g5.dbf). In ArcView 3.2 THEME used "convert to shape file" Produced: wlp94g5.shp, wlp94g5.shx, wlp94g5.dbf Produced:
coverage wlp94g5 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for deprojection process Produced: coverage wlp94g5
in Geographic coordinates, NAD83 Process Description: used ArcInfo ArcToolbox conversion utility Produced: wlp94g5.shp,
wlp94g5.shx, wlp94g5.dbf Produced: file
wlp94g5.e00 Process Description: used MicroStation/J export utility Produced: file
gel94g5.dxf Process Description: Imported gel94g5.dxf into ArcInfo 8.2 Produced: coverage gel94g5 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for the deprojection process Produced: coverage gel94g5 Process Description: used ArcInfo ArcToolbox conversion utility Produced: gel94g5.shp,
gel94g5.shx, gel94g5.dbf Produced: file gel94g5.e00
Geological
Units Data: Process Description: used MicroStation/J export utility Produced: file
una94g5.dxf Process Description: Imported una94g5.dxf into ArcInfo 8.2 Produced: coverage una94g5 Process Description: used Government of Canada Geological Mapping System v. 2.1 customized software for deprojection process Produced:
coverage una94g5 Process Description: used ArcInfo ArcToolbox conversion utility Produced: una94g5.shp,
una94g5.shx, una94g5.dbf Produced: file
una94g5.e00
Process Step: Created DXF file from MicroStation design file Process Description: used MicroStation/J export utility Produced: file
unl94g5.dxf Process Description: Imported unl94g5.dxf into ArcInfo 8.2 Produced: coverage unl94g5 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for the deprojection process Produced: coverage unl94g5 Process Description: used ArcInfo ArcToolbox conversion utility Produced: unl94g5.shp,
unl94g5.shx, unl94g5.dbf Produced: file unl94g5.e00
Stratigraphic
Sections Data: |
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