
OVERVIEW
TITLE:
A GIS dataset of
geological features for the Mount McCusker map area
(94G/4), Peace River-Cassiar District, British Columbia.
FEATURE TYPE AND LOCATION INFORMATION:
Points, lines,
polygons, and attributes representing the geology of the area covered by
NTS map 94G/4 in British Columbia, Canada.
SPATIAL DOMAIN:
Bounding
Coordinates: Geographic coordinates (latitude/longitude) in
decimal degrees.
SW Bounding
Coordinate: 57.00 -124.00
SE Bounding
Coordinate: 57.00 -123.50
NW Bounding
Coordinate: 57.25 -124.00
NE Bounding
Coordinate: 57.25 -123.50
DATA CREATION ENVIRONMENT:
Platform: Desktop
Computer
Operating System:
Microsoft Windows2000
Application:
MicroStation/J, ArcInfo 8.2
DATA QUALITY INFORMATION:
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.
BASE MAP DATA: Vector data type topographical contours and
drainage
Projection:
Universal Transverse Mercator
Horizontal Datum:
North American Datum 1983
Vertical Datum:
Mean Sea Level
Scale: 1:50 000
Distance
Measurement Units: Metres
Elevation Units:
Feet
Type of Media:
Digital (DXF)
Source Producer:
Geomatics Canada
Data Acquisition
Date: 1985
GEOLOGICAL SOURCE DATA: Vector data type geological contacts and
orientation data points.
Original
Compilation: Geological Survey of Canada
Open File 3767
Projection:
Universal Transverse Mercator
Horizontal Datum:
North American Datum 1983
Vertical Datum:
Mean Sea Level
Scale: 1:50 000
Distance Measurement Units: Metres
Elevation Units:
Feet
Production Media:
Paper
Source Producer:
Geological Survey of Canada - Calgary
Publication Date:
2001
Recommended
Citation:
Cecile, M. P.,
Legun, A. S. 2001: Preliminary Geology of Mount McCusker
(94G/4), Peace River-Cassiar District, British Columbia; Geological
Survey
of Canada, Open
File map 3767, scale 1:50 000.
WELL DATA:
ASCII text from
GSC-Calgary's corporate database facilities.
Source
Projection: non-projected
Source Producer:
Government of British Columbia
Extraction Date:
January 2003
LINEAGE:
Geological data
was compiled from field inspection and scientific
interpretation.
ATTRIBUTE ACCURACY:
Independent
evaluation of the attribute and positional accuracy of the geological
data were conducted by peer review.
HORIZONTAL AND VERTICAL POSITIONAL ACCURACY:
The accuracy of
the source components that originated in the Geomatics Canada digital
files, the geological source data digital files, and the National Energy
Board of Canada data text files was maintained.
POSITIONAL DISCREPANCIES:
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.
PROCESS DESCRIPTION:
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.
SPATIAL DATA FILE TYPES:
Data are provided
in the following file types:
.e00 ArcInfo Export file type from ArcInfo 8.2 on a Windows platform
.shp ArcView
Version 3.2 format
.dxf Drawing Exchange Format
SPATIAL DATA
FILES:
The data are
arranged according to the following:
FILE NAME
FILE CONTENTS
gel94g4
geological contacts
srp94g4
orientation data
stp94g4
geological stations
una94g4
geological unit polygons
unl94g4
geological unit lines
wlp94g4
wells
ATTRIBUTE DATA DEFINITIONS:
Attributes are
defined here as the column names of the tables contained
both in the
ArcInfo Exchange Format (E00) and SHAPE dBase (.dbf) files.
TABLE gel94g4
Purpose:
contains the attributes of geology lines
Columns:
type
The type of feature. Examples: fault, contact
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/4
TABLE srp94g4
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 or away from the station
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
station_id A unique identification of the
outcrop where the measurements
were taken
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/4
TABLE stp94g4
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
elevation Elevation of the station in feet
above Mean Sea Level
unit
The predominant geological unit at the outcrop
geologist
Observing geologist
nts_map National Topographic System
designator. Example: 94G/4
TABLE wlp94g4
Purpose:
contains the attributes of points representing oil, water and
gas wells
Columns:
uwi
Unique Wells Identifier
well_name
Well name
spud_date
Start date of drilling operations
td_form Total depth geological
formation
type
Type of well. Examples: gas, oil, water
activity
Status of production following given spud date
surf_lat Geographic latitude
value of the surface location of the well
surf_long
Geographic longitude value of the surface location of the well
source
Original data source. Example: National Energy Board of
Canada
nts_map
National Topographic System designator. Example: 94G/4
TABLE una94g4
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
nts_map National Topographic
System designator. Example: 94G/4
chron_age Sequential numbering of units from
youngest to oldest
for this 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 unl94g4
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
nts_map National Topographic
System designator. Example: 94G/4
chron_age Sequential numbering of units from
youngest to oldest
for this map area
PROCESS DESCRIPTION - DETAILED:
Orientation Data:
Process Step: Created table containing location, identification, and
description details of orientation data Process Description: Structure
Query Language scripts were used to organize the relevant data from
various MS
Access2000 tables into one table Produced: table srp94g4
Process Step: Created graphic file of orientation data locations and
identifiers Process Description: Interfaced MS Access2000 and
MicroStation/J utilizing ODBC driver. Plotted strike/dip symbols and
identifiers
utilizing custom BASIC programs. Produced: srp94g4.dgn
Process Step: Created dBase table of orientation data using table
srp94g4
Process Description: Exported srp94g4 from MS Access2000 to dBase
Version V
Produced: file srp94g4.dbf
Process Step: Created SHAPE files from srp94g4.dbf Process Description:
in ArcView 3.2
TABLES used "add" to import the srp94g4.dbf table and
with VIEW "add
event theme" Table: srp94g4.dbf X Field: Easting Y Field: Northing
(table columns in srp94g4.dbf). In ArcView 3.2 THEME used
"convert to shape
file" Produced: srp94g4.shp, srp94g4.shx, srp94g4.dbf
Process Step: Created ArcInfo 8.2 coverage from srp94g4 SHAPE files
Process Description: SHAPEARC srp94g4.shp srp94g4
Produced:
coverage srp94g4
Process Step: Deprojected ArcInfo 8.2 srp94g4 coverage Process
Description: used Government of Canada Geological Mapping System
v. 2.1 Customized
software for deprojection process
Produced:
coverage srp94g4
Process Step: Created SHAPE files from coverage srp94g4 Process
Description: ARCSHAPE srp94g4 srp94g4.shp Produced: srp94g4.shp,
srp94g4.shx, srp94g4.dbf
Process Step: Created ArcInfo 8.2 EXPORT file from coverage srp94g4
Process Description: ARCE00 srp94g4 srp94g4.e00
Produced: file
srp94g4.e00
Stations Data:
Process Step: Created table containing location, identification, and
description details of station data Process Description: Structure Query
Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table stp94g4
Process Step: Created graphic file of station locations and identifiers
Process Description: Interfaced MS Access2000 and MicroStation/J
utilizing
ODBC driver. Plotted station symbols and identifiers utilizing custom
BASIC
programs. Produced: stp94g4.dgn
Process Step: Created dBase table of station data using table stp94g4
Process Description: Exported stp94g4 from MS Access2000 to dBase
Version V
Produced: file stp94g4.dbf
Process Step: Created SHAPE files from stp94g4.dbf Process Description:
in ArcView 3.2
TABLES used "add" to import the stp94g4.dbf table and
with VIEW "add
event theme" Table: stp94g4.dbf X Field: Easting Y Field: Northing
(table columns in stp94g4.dbf). in ArcView 3.2 THEME used
"convert to shape
file" Produced: stp94g4.shp, stp94g4.shx, stp94g4.dbf
Process Step: Created ArcInfo 8.2 coverage from stp94g4 SHAPE files
Process Description: SHAPEARC stp94g4.shp stp94g4
Produced:
coverage stp94g4
Process Step: Deprojected ArcInfo 8.2 stp94g4 coverage Process
Description: used
Government of Canada Geological Mapping System v. 2.1 Customized
software for deprojection process Produced: coverage stp94g4
Process Step: Created SHAPE files from coverage stp94g4 Process
Description: ARCSHAPE stp94g4 stp94g4.shp Produced: stp94g4.shp,
stp94g4.shx, stp94g4.dbf
Process Step: Created ArcInfo 8.2 EXPORT file from coverage stp94g4
Process Description: ARCE00 stp94g4 stp94g4.e00
Produced: file
stp94g4.e00
Wells Data:
Process Step: Created table containing location, identification, and
description details of station data Process Description: Structure Query
Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table wlp94g4
Process Step: Created graphic file of station locations and identifiers
Process Description: Interfaced MS Access2000 and MicroStation/J
utilizing
ODBC driver. Plotted station symbols and identifiers utilizing custom
BASIC
programs. Produced: wlp94g4.dgn
Process Step: Created dBase table of station data using table wlp94g4
Process Description: Exported wlp94g4 from MS Access2000 to dBase
Version V
Produced: file wlp94g4.dbf
Process Step: Created SHAPE files from wlp94g4.dbf Process Description:
in ArcView 3.2
TABLES used "add" to import the wlp94g4.dbf table and
with VIEW "add
event theme" Table: wlp94g4.dbf X Field: Easting Y Field: Northing
(table columns in wlp94g4.dbf). in ArcView 3.2 THEME used
"convert to shape
file" Produced: wlp94g4.shp, wlp94g4.shx, wlp94g4.dbf
Process Step: Created ArcInfo 8.2 coverage from wlp94g4 SHAPE files
Process Description: SHAPEARC wlp94g4.shp wlp94g4
Produced:
coverage wlp94g4
Process Step: Deprojected ArcInfo 8.2 wlp94g4 coverage Process
Description: used
Government of Canada Geological Mapping System v. 2.1 Customized
software for deprojection process Produced: coverage wlp94g4
Process Step: Created SHAPE files from coverage wlp94g4 Process
Description: ARCSHAPE wlp94g4 wlp94g4.shp Produced: wlp94g4.shp,
wlp94g4.shx, wlp94g4.dbf
Process Step: Created ArcInfo 8.2 EXPORT file from coverage wlp94g4
Process Description: ARCE00 wlp94g4 wlp94g4.e00
Produced: file
wlp94g4.e00
Geological Lines Data:
Process Step: Created DXF file from MicroStation design file Process
Description: used MicroStation/J export utility Produced: file
gel94g4.dxf
Process Step: Created ArcInfo 8.2 gel94g4 coverage Process Description:
Imported gel94g4.dxf into ArcInfo 8.2 Produced: coverage gel94g4
Process Step: Deprojected coverage gel94g4 Process Description: used
Government of Canada Geological Mapping System v. 2.1 Customized
software for the deprojection process Produced: coverage gel94g4
Process Step: Created SHAPE files from coverage gel94g4 Process
Description: ARCSHAPE gel94g4.shp gel94g4 Produced: gel94g4.shp,
gel94g4.shx, gel94g4.dbf
Process Step: Created ArcInfo 8.2 EXPORT file from coverage gel94g4
Process Description: ARCE00 gel94g4 gel94g4.e00
Produced: file
gel94g4.e00
Geological Units
Data:
Process Step: Created DXF file from MicroStation design file Process
Description: used MicroStation/J export utility Produced: file
una94g4.dxf
Process Step: Created ArcInfo 8.2 una94g4 coverage Process Description:
Imported una94g4.dxf into ArcInfo 8.2 Produced: coverage una94g4
Process Step: Deprojected ArcInfo 8.2 coverage una94g4 Process
Description: used Government of Canada Geological Mapping System
v. 2.1 customized
software for deprojection process
Produced:
coverage una94g4
Process Step: Created SHAPE files from una94g4 coverage Process
Description: ARCSHAPE una94g4 una94g4.shp Produced: una94g4.shp,
una94g4.shx, una94g4.dbf
Process Step: Created ArcInfo 8.2 EXPORT file from una94g4 coverage
Process
Description: ARCE00 una94g4 una94g4.e00 Produced: file una94g4.e00
Process Step:
Created DXF file from MicroStation design file Process
Description: used MicroStation/J export utility Produced: file
unl94g4.dxf
Process Step: Created ArcInfo 8.2 unl94g4 coverage Process Description:
Imported unl94g4.dxf into ArcInfo 8.2 Produced: coverage unl94g4
Process Step: Deprojected coverage unl94g4 Process Description: used
Government of Canada Geological Mapping System v. 2.1 Customized
software for the deprojection process Produced: coverage unl94g4
Process Step: Created SHAPE files from coverage unl94g4 Process
Description: ARCSHAPE unl94g4.shp unl94g4 Produced: unl94g4.shp,
unl94g4.shx, unl94g4.dbf
Process Step: Created ArcInfo 8.2 EXPORT file from coverage unl94g4
Process Description: ARCE00 unl94g4 unl94g4.e00
Produced: file
unl94g4.e00
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