BCGS 1:2,500 Mapsheet Grid - NAD 27

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Published by the Ministry of Forests, Lands, Natural Resource Operations and Rural Development - GeoBC
Licensed under Open Government Licence - British Columbia

BCGS 1:2,500 scale grid, North Amercian Datum 1927. The British Columbia Geographic System is a geographic system in which the coverage in minutes and seconds of longitude is double the coverage in minutes and seconds of latitude for sheets at all scales.This particular grid was generated in the older NAD27 datum to replicate historic Water Rights paper maps used by surface water rights management program

Data and Resources

Dataset Extent

Latitude: 48.0° to 60.0°
Longitude: -139.5° to -113.5°

Additional Information


To provide an index grid for BCGS 1:2,500 scale maps. This NAD27 version accurately places the boundaries of the historic 1:2,500 Water Rights mapping on geographical features mapped to the current NAD83 survey network. The historic maps contain features which are indexed by mapsheet number, so this grid was created to accurately reflect those numbers in relation to more accurate mapping in NAD83.

Lineage Statement

Created at Ministry of Environment, Lands and Parks ISB 1998 on Unix ArcInfo.

Contact Information

NameBase Mapping and Cadastre Help Desk (pointOfContact)
OrganizationMinistry of Forests, Lands, Natural Resource Operations and Rural Development

Access & Security

Who can view this dataset? Public
Who can download this dataset?Public

Metadata Information

Record Published 2011-03-09
Record Last Modified 2021-09-28
Resource Status completed

Object Description


Short Name: DBMBCGS25C
Comments: British Columbia Geographic Series 1:2,500 Mapsheet Grids. These mapsheet rectangles labelled with mapsheet name, datum shifted to NAD 27 datum locations. The original coverage is in BC Albers NAD 83, so must not be datum shifted again when loaded to LRDW. However, the lines in it represent the locations on the ground of the mapsheet boundaries originally created in NAD27. This is not a multipart feature class.

Column Name Short Name Data Type Data Precision Comments
BCGS_25C_GRID_ND27_AREA_ID BCGS25CGRD NUMBER 10 Primary unique numeric identifier for a Polygon.
FEATURE_CODE FTRCD VARCHAR2 10 A standard numeric code to identify the type of feature represented by the spatial data. A feature code is most importantly a means of linking a feature to its name and definition. For example, the code GB15300120 on a digital geographic feature links it to the name "Lake - Dry" with the definition "A lake bed from which all water has drained or evaporated." The feature code does NOT mark when it was digitized, what dataset it belongs to, how accurate it is, what it should look like when plotted, or who is responsible for updating it. It only says what it represents in the real world. It also doesn't even matter how the lake is represented. If it is a very small lake, it may be stored as a point feature. If it is large enough to have a shape at the scale of data capture, it may be stored as an outline, or a closed polygon. The same feature code still links it to the same definition.
MAP_TILE_DISPLAY_NAME MPTLDSPLNM VARCHAR2 30 British Columbia Geographic Series (BCGS) 1:2,500 Map number- conforms to BCGS Specifications Document.
MAP_TILE MAP_TILE VARCHAR2 30 British Columbia Geographic Series (BCGS) 1:2,500 Map number
GEOMETRY GEOMETRY SDO_GEOMETRY 1 GEOMETRY is the column used to reference the spatial coordinates defining the feature.
OBJECTID OBJECTID NUMBER 38 OBJECTID is a required attribute of feature classes and object classes in a geodatabase.
SE_ANNO_CAD_DATA BLOB 4000 SE_ANNO_CAD_DATA is a binary column used by spatial tools to store annotation, curve features and CAD data when using the SDO_GEOMETRY storage data type.
FEATURE_AREA_SQM AREA_SQM NUMBER 19 FEATURE_AREA_SQM is the system calculated area of a two-dimensional polygon in square meters
FEATURE_LENGTH_M FEAT_LEN NUMBER 19 FEATURE_LENGTH_M is the system calculated length or perimeter of a geometry in meters