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OVERVIEW
TITLE: A GIS dataset
of geological features for the Dendale Lake map area (95C/15), Yukon
Territory and Northwest Territories. Points, lines,
polygons, and attributes representing the geology of the area covered by
NTS map 95C/15 in southeastern Yukon Territory and southwestern
Northwest Territories, Canada. Bounding Coordinates: Geographic coordinates (latitude/longitude) in decimal degrees. SW Bounding Coordinate: 60.75 -125.00 SE Bounding Coordinate: 60.75 -124.50 NW Bounding Coordinate: 61.00 -125.00 NE Bounding
Coordinate: 61.00 -124.50 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 Measurement Units: Metres Elevation Units: Feet Type of Media: Digital (DXF) Source Producer: Geomatics Canada Data
Acquisition Date: 1961 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: 2002 Recommended Citation: Fallas, K.M.
2002: Geology, Dendale Lake (95C/15), Yukon Territory and Northwest
Territories; Geological Survey of Canada, Open
File 1460, scale 1:50 000. 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: gel95c15 geological contacts srp95c15 orientation data stp95c15 geological stations una95c15 geological unit polygons unl95c15 geological unit lines
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: 95C/15 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 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: 95C/15 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 dom_lithol The dominant lithologies at the outcrop geologist
Observing geologist 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 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 unl95c15 Purpose: contains the attributes of lines representing geological units Columns: label Hardcopy map unit labels group Group name formation Unit name member Member name gen_descr
Unit description for this map area
various MS
Access2000 tables into one table Produced: table srp95c15 identifiers
utilizing custom BASIC programs. Produced: srp95c15.dgn Version V
Produced: file srp95c15.dbf in ArcView 3.2 TABLES used "add" to import the srp95c15.dbf table and with VIEW "add event theme" Table: srp95c15.dbf X Field: Easting Y Field: Northing (table columns in srp95c15.dbf). In ArcView 3.2 THEME used "convert to
shape file" Produced: srp95c15.shp, srp95c15.shx, srp95c15.dbf Produced:
coverage srp95c15 v. 2.1 Customized software for deprojection process Produced:
coverage srp95c15 Produced: file
srp95c15.e00 Version V in ArcView 3.2 TABLES used "add" to import the stp95c15.dbf table and with VIEW "add event theme" Table: stp95c15.dbf X Field: Easting Y Field: Northing (table columns in stp95c15.dbf). in ArcView 3.2 THEME used "convert to
shape file" Produced: stp95c15.shp, stp95c15.shx, stp95c15.dbf Produced:
coverage stp95c15 Description:
used Government of Canada Geological Mapping System v. 2.1 Customized
software for deprojection process Produced: coverage stp95c15 Produced: file
stp95c15.e00 Produced: file gel95c15.e00
Geological
Units Data: v. 2.1 customized software for deprojection process Produced:
coverage una95c15 Process Step:
Created DXF file from MicroStation design file Process Produced: file unl95c15.e00
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