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OVERVIEW TITLE: A GIS dataset
of geological features for the Brown Lake map area (95C/7), Yukon
Territory. FEATURE TYPE AND LOCATION INFORMATION: Points, lines,
polygons, and attributes representing the geology of the area covered by
NTS map 95C/7 in southeastern Yukon Territory, Canada. Bounding Coordinates: Geographic coordinates (latitude/longitude) in decimal degrees. SW Bounding Coordinate: 60.25 -125.00 SE Bounding Coordinate: 60.25 -124.50 NW Bounding Coordinate: 60.50 -125.00 NE Bounding
Coordinate: 60.50 -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 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: Khudoley, A.K. 2002: Geology of the Brown Lake map area (95C/7), Yukon Territory; Geological Survey of Canada, Open File map 4267, 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: gel95c7 geological contacts srp95c7 orientation data stp95c7 geological stations una95c7 geological unit polygons
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/7 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/7 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 contacts A list of units in contact with the predominant unit sta_signif The significance of the station 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
PROCESS
DESCRIPTION - DETAILED: Process Description: Structure
Query Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table srp95c7 Process Description: Interfaced MS Access2000 and MicroStation/J utilizing ODBC driver. Plotted strike/dip symbols and identifiers utilizing custom BASIC programs. Produced: srp95c7.dgn Version V Produced: file srp95c7.dbf Process Description: in ArcView 3.2 TABLES used "add" to import the srp95c7.dbf table and with VIEW "add event theme" Table: srp95c7.dbf X Field: Easting Y Field: Northing (table columns in srp95c7.dbf). In ArcView 3.2 THEME used "convert to shape file" Produced: srp95c7.shp, srp95c7.shx, srp95c7.dbf Produced:
coverage srp95c7 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for deprojection process Produced:
coverage srp95c7 in Geographic coordinates, NAD83 Process Description: used ArcInfo ArcToolbox conversion utility Produced: srp95c7.shp,
srp95c7.shx, srp95c7.dbf Produced: file
srp95c7.e00 Process Description: Structure Query
Language scripts were used to organize the relevant data from various MS
Access2000 tables into one table Produced: table stp95c7 Produced: stp95c7.dgn Version V Process Description: in ArcView 3.2 TABLES used "add" to import the stp95c7.dbf table and with VIEW "add event theme" Table: stp95c7.dbf X Field: Easting Y Field: Northing (table columns in stp95c7.dbf). in ArcView 3.2 THEME used "convert to shape file" Produced: stp95c7.shp, stp95c7.shx, stp95c7.dbf Produced:
coverage stp95c7 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for deprojection process Produced: coverage stp95c7
in Geographic coordinates, NAD83 Process Description: used ArcInfo ArcToolbox conversion utility Produced: stp95c7.shp,
stp95c7.shx, stp95c7.dbf Produced: file
stp95c7.e00 Process Description: used MicroStation/J export utility Produced: file
gel95c7.dxf Process Description: Imported gel95c7.dxf into ArcInfo 8.2 Produced: coverage gel95c7 Process Description: used Government of Canada Geological Mapping System v. 2.1 Customized software for the deprojection process Produced: coverage gel95c7 Process Description: used ArcInfo ArcToolbox conversion utility Produced: gel95c7.shp,
gel95c7.shx, gel95c7.dbf Produced: file gel95c7.e00
Geological
Units Data: Process Description: used MicroStation/J export utility Produced: file
una95c7.dxf Process Description: Imported una95c7.dxf into ArcInfo 8.2 Produced: coverage una95c7 Process Description: used Government of Canada Geological Mapping System v. 2.1 customized software for deprojection process Produced:
coverage una95c7 Process Description: used ArcInfo ArcToolbox conversion utility Produced: una95c7.shp,
una95c7.shx, una95c7.dbf Produced: file
una95c7.e00 |
