Geological Map of Canada (CD-ROM) Map D1860A GIS database structure ---------------------- Cartographic projection ----------------------- All of the spatial data in the Arc/Info coverages, and in the *.E00 and *.SHP files is stored in the same projection described by the following set of projection parameters: Geological Map of Canada projection parameters ---------------------------------------------- Parameter Value ---------------------------------------------------------- Type Lambert Conformal Conic projection Datum North American Datum 1927 (NAD27) Units metres Spheroid Clarke, 1866 Lambert standard 49 00 00 N parallels 77 00 00 N Projection origin 95 00 00 W (central meridian) 49 00 00 N False origin (easting, northing)=(0, 0) The \CANADA\SHPGEO\... *.SHP files contain geographic (longitude, latitude) co-ordinates. Data sets --------- The following tables describe the database fields which appear in the Arc/Info workspaces, *.E00 files and .DBF files which accompany the *.SHP files. The codes used for directory and file names correspond to either the compilation block (ARC, SUP, etc.) and/or data type (ROX, RIV, BND, etc.). Geological data sets -------------------- ROX: geology (polygons and linework) Geological unit areas are defined as polygons and geological contacts are defined as lines. The following items are attached to each polygon: Database fields for ROX polygons -------------------------------- Field Description --------------------------------------------------- SYMBOL symbol number COMP compiler's name English UNIT unit code DOMAIN onshore/offshore/ice COUNTRY country ERA age at the era level PERIOD age at the period level EPOCH age at the epoch or period level REWORKAG age of reworking/intense metamorphism RXTP general rock category SUBRXTP specific rock category if applicable AGERXTP age/rock type combination for viewers METGRADE metamorphic grade GEOLPROV geological province NAME unit name French UNITE French equivalent of 'UNIT' field DOMAINE French equivalent of 'DOMAIN' field PAYS French equivalent of 'COUNTRY' field ERE French equivalent of 'ERA' field PERIODE French equivalent of 'PERIOD' field EPOQUE French equivalent of 'EPOCH' field AGETRANS French equivalent of 'REWORKAG' field TPRCH French equivalent of 'RXTP' field SUBTPRCH French equivalent of 'SUBRXTP' field AGETPRCH French equivalent of 'AGERXTP' field NIVMET French equivalent of 'METGRADE' field PROVGEOL French equivalent of 'GEOLPROV' field NOM French equivalent of 'NAME' field The following items are attached to each line: Database fields for ROX arcs ---------------------------- Field Description ---------------------------------------------------- SYMBOL a symbol number COMP compiler's name DXF-LAYER description code (see table below) English COUNTRY country ENGDESC detailed English description of line French PAYS French equivalent of 'COUNTRY' field FREDESC French equivalent of 'ENGDESC' field FLT: faults (geological linework, e.g. faults, fracture zone, etc.) Geological linework, other than geological contacts, are defined as lines, and points are used to define markers or symbology on the lines. The following items are attached to each line and point: Database fields for FLT arcs ---------------------------- Field Description ---------------------------------------------------- SYMBOL a symbol number COMP compiler's name DXF-LAYER description code (see table below) English COUNTRY country ENGDESC detailed English description of line NAME feature name (to be added by user) French PAYS French equivalent of 'COUNTRY' field FREDESC French equivalent of 'ENGDESC' field NOM French equivalent of 'NAME' field SYM: geological symbols (e.g. impact structure, volcanic centre, etc.) The geological symbols on this map are defined as lines and points. The following items are attached to each line and point: Database fields for SYM symbols ------------------------------- Field Description -------------------------------------------- SYMBOL a symbol number COMP compiler's name DXF-LAYER description code (see table below) English COUNTRY country ENGDESC detailed English description of symbol NAME feature name (to be added by user) French PAYS French equivalent of 'COUNTRY' field FREDESC French equivalent of 'ENGDESC' field NOM French equivalent of 'NAME' field Topographic data sets --------------------- RIV: line cover of all lakes and rivers that appear in each area. The topographical data are defined as lines. The following items are attached to each line and point: Database fields for RIV arcs ---------------------------- Field Description ---------------------------------------------------- SYMBOL a symbol number DXF-LAYER description code (see table below) English ENGDESC detailed English description of line French FREDESC French equivalent of 'ENGDESC' field LAK: polygons of all lakes that appear in each area The topographical areas are defined as polygons. The following items are attached to each polygon: Database fields for LAK polygons -------------------------------- Field Description --------------------------------------------------- SYMBOL a symbol number DXF-LAYER description code (see table below) English ENGDESC detailed English description French FREDESC French equivalent of 'ENGDESC' field BND: line cover of all political boundaries that appear in each area. The topographical data are defined as lines. The following items are attached to each line: Database fields for BND arcs ---------------------------- Field Description --------------------------------------------------- SYMBOL a symbol number DXF-LAYER description code (see table below) English ENGDESC detailed English description of line French FREDESC French equivalent of 'ENGDESC' field In addition, the following Canada-wide coverages of topographic data are supplied: BAS1860A: topographical linework and point symbols of all Canada The topographical data are defined as lines and points. The following items are attached to each line and point: Database fields for BAS1860A arcs and points -------------------------------------------- Field Description SYMBOL a symbol number DXF-LAYER description code (see table below) English ENGDESC detailed English description NAME city name (in point file only) French FREDESC French equivalent of 'ENGDESC' field NOM French equivalent of 'NAME' field WAT1860A: polygons (lakes, oceans, etc.) of all Canada The topographical areas are defined as polygons for unit areas and lines for shoreline. The following items are attached to each line and polygon: Database fields for WAT1860A polygons ------------------------------------- Field Description ---------------------------------------------- SYMBOL a symbol number DXF-LAYER description code (see table below) English ENGDESC detailed English description French FREDESC French equivalent of 'ENGDESC' field BUF1860A: buffer polygons around islands and shoreline of all Canada. This special polygon cover is included to create a white band around all shorelines and islands. This helps to separate the onshore geology from the offshore. The polygons use the attribute item 'INSIDE'. TXT1860A: topographical text of all Canada The topographical text on this map is defined as annotation. The annotation is stored as a subclass called 'TEXT' which uses the attribute item 'TXT-CLASS' NOTE: Covers may be exported in DXF format. Different line and symbol types will be exported as separate AUTOCAD layers by using the 'DXF-LAYER' item. List of DXF-LAYER codes and descriptions ---------------------------------------- The following is a list of all DXF-LAYER attributes that appear in the data with a brief description. Linework Values for the DXF-LAYER field ------------------------------ DXF-LAYER value Description --------------------------------------- UNCLASS_FLT unclassified fault UNCLASS_FLT_OFF unclassified fault offshore THRUST_FLT thrust fault (teeth on upper plate) THRUST_FLT_OFF thrust fault offshore (teeth on upper plate) NORMAL_FLT normal fault (hachures on downthrown side) NORMAL_FLT_OFF normal fault offshore STRIKE_SLIP_FLT strike slip fault STRIKE_SLIP_OFF strike slip fault offshore SPREAD_CTR offshore spreading centre DEFORM_FRONT offshore deformation front SEAFLOOR_ISO seafloor isochron PSEUDO_FLT offshore pseudo fault FRACTURE_ZONE offshore fracture zone FLEXURE_FLT offshore flexure fault TRANSFORM_FLT offshore transform fault EXTINCT_CENTRE extinct spreading centre SED_ISOPACH oceanic sediment isograds (defined) SED-ISOPACH2 oceanic sediment isograds (assumed) CONT_OCEAN_BDRY continent ocean boundary (defined) CONT_OCEAN_BDRY2 continent ocean boundary (assumed) FACIES_BDRY facies boundary CONTACT geological contact OFF_CONTACT offshore geological contact (inferred) OTHERS miscellaneous lines EVAP_DIAPIR evaporite diapir BURIED_CONTACT buried contact BURIED_FLT buried fault IMPACT impact structure FAULT_BDRY fault boundary ICE_BDRY ice boundary Symbols Values for the DXF-LAYER field in SYM coverages ----------------------------------------------- DXF-LAYER value Description --------------------------------------------- VOLCANIC_CENTER volcanic centre DIATREME diatreme KIMBERLITE kimberlite CARBONATITE carbonatite TrJ_ULTRAMAFIC Alaskan-type ultramafic bodies (Triassic Jurassic) mK_ULTRAMAFIC Alaskan-type ultramafic bodies (mid-Cretaceous) EVAP_DIAPIR evaporite diapir ACC_TERRANE leading edge of accreted terrane Base DXF-LAYER Value Description ------------------------------------------- NEATLINE neatline URBAN_BDRY urban boundary UNSURVEY_BDRY unsurveyed boundary DIST_BDRY district boundary PROV_BDRY provincial boundary INT_BDRY international boundary CITY_NAME city name SHORELINE shoreline LAKE lake RIVER river ARC_CIRCLE arctic circle BATHYMETRY submarine contour ISLAND island