Readme File for Shape Files
===========================

Publication Information
-----------------------

Sheet 1
Geological Survey of Canada, Open File 4931 (3 sheets)
Geology, Baffin Island (south of 70°N and east of 80°W), Nunavut
M.R. St-Onge, G.D. Jackson, I. Henderson

© Her Majesty the Queen in Right of Canada 2006

NOTE: Open files are products that have not gone through the
GSC formal publication process.

Digital Topographic Data provided by Geomatics Canada, Natural Resources Canada.

 
Shape File Information
----------------------

The following coverages have been converted to shape files.

Original name of coverage: HYD4931_1
Shape file: hyd4931_1_arc.shp
Feature: Arcs
Description: Hydrology line features
Shape file: hyd4931_1_ply.shp
Feature: Polygons
Description: Hydrology polygon features

Original name of coverage: BAS4931_1
Shape file: bas4931_1_arc.shp
Feature: Arcs
Description: Base line features, not including hydrology
Shape file: bas4931_1_pnt.shp
Feature: Points
Description: Base point features, not including hydrology

Original name of coverage: NTL4931_1
Shape file: ntl4931_1_arc.shp
Feature: Arcs
Description: Neatline of map
Shape file: ntl4931_1_ply.shp
Feature: Polygons
Description: Neatline area of map

Original name of coverage: GEO4931_1
Shape file: geo4931_1_arc.shp
Feature: Arcs
Description: Geological contacts
Shape file: geo4931_1_ply.shp
Feature: Polygons
Description: Geological polygons
This coverage contains associated info files that have been converted to the
following DBASE files:
   geo4931_1_leg.dbf - Legend description of CODE values
   geo4931_1_lvl.dbf - Description of levels in legend info file
   geo4931_1_sym.dbf - Symbols used for each CODE value
   geo4931_1_ext.dbf - Description of items contained in external tables

Original name of coverage: LIN4931_1
Shape file: lin4931_1_arc.shp
Feature: Arcs
Description: Geological line features

Original name of coverage: PNT4931_1
Shape file: pnt4931_1_pnt.shp
Feature: Points
Description: Geological point features

Notes
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Info files contain legend information of geological features.  Records in the
GEO4931_1.LEG info file are related to feature attributes using the CODE
item/field.  Values of the LEVEL item/field in the GEO4931_1.LVL info file
are related to the LEVEL items in the GEO4931_1.LEG info file.
The GEO4931_1.SYM info file list the symbols used for each of the CODE values
listed in the GEO4931_1.LEG info file.

Abbreviations for GSC Special Characters
----------------------------------------
 
These abbreviations occur in the values of the item CODE
for geological units as well as in the description of 
geological units in the geological legend info file.
 
Cn - Cenozoic               Cb - Carboniferous
Qt - Quaternary             Dv - Devonian
Rc - Recent                 Sl - Silurian
Ps - Pleistocene            Od - Ordovician
Te - Tertiary               Cm - Cambrian
Pi - Pliocene               Pt - Proterozoic
Mi - Miocene                Hd - Hadrynian
Og - Oligocene              Hl - Helikian
Ec - Eocene                 Nh - Neohelikian
Pc - Paleocene              Ph - Paleohelikian
Ng - Neogene                Ap - Aphebian
Pg - Paleogene              Ar - Archean
Mz - Mesozoic               Ho - Holocene
Ct - Cretaceous             Na - Neoarchean
Jr - Jurassic               Pa - Paleoarchean
Tr - Triassic               Ma - Mesoarchean
Pz - Paleozoic              Ea - Eoarchean
Pr - Permian                Np - Neoproterozoic
Pn - Pennsylvanian          Pp - Paleoproterozoic
Ms - Mississippian          Mp - Mesoproterozoic
 
Abbreviations are always two letters starting with a capital.
 
A dash separates the special character abbreviation from the rest
of the unit reference letters (eg. Mz-g is (Mesozoic)g).
 
Multiple special characters in a unit reference will be strung
together as one (eg. (Mesozoic)(Archean)g -> MzAr-g
 
When a dash, comma or slash exists in a unit reference, it is
replaced with an underscore (eg. Mz-g, Mz-h -> Mz-g_Mz-h).
 
Age modifiers are a single case sensitive letter that appears before
the special character abbreviation (eg. (Late)(Mesozoic)g -> LMz-g
 
l - lower                    E - early
m - middle                   M - middle
u - upper                    L - late