Only those markers with published NAD27 coordinate values on or before May 31, 1994, have been included in these North American Datum 1927 (NAD27) coordinate listings for Alberta Survey Control Markers (ASCMs).
ASCMs integrated into the provincial spatial referencing system after May 31, 1994, contain integrated North American Datum 1983 (NAD83) coordinate values only. Therefore, no transformed (NAD83 to NAD27) coordinated values are included in the listings for these markers. However, users can derive NAD27 coordinate values by transforming integrated NAD83 geographic or Transverse Mercator coordinates to NAD27 using the National Transformation version 2.0 (NTV2).
For more information, please see:
Data File Descriptions
For user's convenience, the NAD27 data have been broken into four Microsoft Excel format data files. The four files comprise ASCMs within the Municipal Integrated Surveying and Mapping (MISAM) areas of Calgary, Edmonton, the other 71 MISAM municipalities combined and the rural (non-MISAM) areas combined.
Each file has been sorted by the ASCM number. However, users can manipulate the data to fit their own needs using the various functions within Microsoft Excel. Also, each file’s compilation date is shown on the first line of the file. For each ASCM listed, the following information (data types) is given:
For more information on each of the data types provided within the four files, see the Alberta Survey Control Products Manual in the Alberta Survey Control (ASC) Products section.