| Abstract |
This product provides large scale mapping (i.e. 1:1 000 to 1:5 000) of Canada Lands located in Atlantic Canada. It contains topographic information including utilities, land cover, occupational limits and administrative boundaries, contours, hydrography, building and transportation features. The mapping information is derived from high resolution aerial photography or large scale aerial photographs. The data is available in both ESRI file geodatabase (GDB) and DXF formats. |
| Date |
2026-05-22
(publication; publication)
|
| Reference system |
EPSG:2953 (Stereographic Double (New Brunswick) - NAD83 CSRS) |
| Contact |
Government of Canada; Natural Resources Canada; Surveyor General Branch; Cadastral Information Service
(custodian; conservateur)
nrcan.clss-satc.rncan@canada.ca voice; 1 (343) 2927728 |
| Horizontal Positional Absolute Accuracy |
0.2500
The horizontal positional absolute accuracy of the dataset is measured as the difference between entity positions in the dataset and their real ground positions measured in reference to the coordinate reference system. The accuracy is expressed in metres at 95% confidence level. The absolute accuracy value is an estimate based on a brief analysis of the aerotriangulation results; a brief comparison analysis between control points measured on the new stereoscopic models and the control points measured in the field; and a brief comparison analysis between sample points measured on the new stereoscopic models and the existing topographic mapping sheets prepared by the Surveyor General Branch. A field inspection of a few points using GPS is performed occasionally. |
| Vertical Positional Absolute Accuracy |
0.3500
The vertical positional absolute accuracy of the dataset is measured as the difference between vertical entity positions (spot heights and contour lines) in the dataset and their real ground positions measured in reference to the vertical reference system (CGVD28). The accuracy is expressed in metres at 95% confidence level. The vertical absolute accuracy value is an estimate based on a brief analysis of the aerotriangulation results; a brief comparison analysis between control points measured on the new stereoscopic models and the control points measured in the field; and a brief comparison analysis between sample points measured on the new stereoscopic models and the existing topographic mapping sheets prepared by the Surveyor General Branch. A field inspection of a few points using GPS is performed occasionally. |