Digital regional compilations of the geology of
B.C. at 1:250 000 scale were made by staff of the Geological Survey Branch in 1992-96 in support of the
Mineral Potential Project. These were released as Open Files and
digital downloads from the GSB website (http://www.em.gov.bc.ca/geology).
They were also used as the geology base for the Map Place (http://www.mapplace.ca).
However, numerous errors and inconsistencies were noted within these
data sets. The Digital Geology Map of British Columbia
Project was designed to address these problems and, in the
process, try to produce a seamless digital map of the Province with
consistent geological tagging. Where feasible, updates to the geology have
also been incorporated during the editing process. However, some “scratch
lines” remain in the data reflecting problems due to unresolved
differences in geological designations in original sources.
Release of the recompilation is based on the same tiles
as the Cordilleran GIS Map Library (Journeay and Williams, 1995)
which conforms to the International Map of the World standard used
for indexing
1:1 000 000 scale topographic maps.
This differs from the
numbering convention used for the National Topographic
System maps. NTS sheets contained within this tile are listed below. Preliminary versions of the tiled data were released in 2003,
with updates in 2004. This new province-wide version, and associated tiled
data, supersedes the earlier files.
Tile NO9 encompasses NTS 1:250,000 sheets 94D, 94E, 94L, 94M, 104A, 104B, 104G, 104H, 104I, 104J, 104O and 104P.
All data sets are in shape file format that should be readily usable by most GIS software.
They are presented as either decimal degrees (suffix _ll) or
BC Albers (suffix _alb).
Tiled data are also available in UTM (suffix _utm) projections. All projections use NAD83 as the datum.
The
data sets are intended to be used at 1:250 000 scale and their use at greater scales is not recommended.
NOTE: All GeoFile documents referenced on this page are only
available as downloadable documents via this web site. No hardcopy data will
be available. A DVD containing all data sets
is also available for purchase from Crown Publications. The shape files include .AVL files
suitable for symbolization by ArcView 3.x users. A style sheet
(BCDigitalMap.style)
for ArcMap 8.x users is also available for download.
Massey, N.W.D., MacIntyre, D.G.,
Desjardins, P.J. and Cooney, R.T., 2005: Digital Map of British Columbia: Tile NO9 North Central B.C.,
B.C. Ministry of Energy and Mines, GeoFile 2005-9.
BC
Digital Geology Maps
All publications of the BC Geological Survey are available
for purchase through Crown Publications Inc. (and its agents).
For questions or more information on geology and minerals
in British Columbia please contact GSB Mailbox
or use the toll free number
(B.C. residents only).
