BCGS 1:2,500 Mapsheet Grid - NAD 27
386 views (2 recent)Published by the Ministry of Forests, Lands, Natural Resource Operations and Rural Development - GeoBC
Licensed under Open Government Licence - British Columbia
Data and Resources
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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.
Created at Ministry of Environment, Lands and Parks ISB 1998 on Unix ArcInfo.
|Name||Base Mapping and Cadastre Help Desk (pointOfContact)|
|Organization||Ministry of Forests, Lands, Natural Resource Operations and Rural Development|
Access & Security
|Who can view this dataset?||Public|
|Who can download this dataset?||Public|
|Record Last Modified||2021-09-28|
Object Name: WHSE_BASEMAPPING.DBM_BCGS_25C_GRID_ND27_AREA_SP
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|