Acquired aerial photography (1:5000 to 1:60 000 scale).
Performed aerotriangulation of photography, geo-referencing all photogrammetric controls to true ground coordinates.
Collected vector digital data using analogue plotters (Wild A10 - A8 - B8S). Vector data were three dimensional (x,y,z) and geo-referenced to UTM coordinates. The output format was DXF.
Performed cursory checks of digital data (removal of pseudo nodes, creation of polygons, etc.).
Built lines and points then copied attribute information from the ACODE and XCODE tables into the arc and point attribute tables (AAT and PAT). Dropped five attribute fields from the resulting attribute tables.
Selected arcs representing transportation areas based on the dxf-layer attribute. Put the arcs for each transportation area category to respective ArcInfo coverages.
Built transportation polygons, created error files if dangles or intersections were present, then cleaned coverages with fuzzy and dangle tolerances of 0.0001.
Manually edited coverages to eliminate dangles.
Joined all transportation area layers into one coverage, cleaned with tolerances of 0.01, and checked for label errors. Performed manual edits to correct label errors.
Appended mapsheet transportation area coverages into a Manitoba-wide coverage and cleaned with fuzzy and dangle tolerances of 0.01. Unsplit arcs based on the dxf-layer attribute code. Performed edits to ensure good edgematching. Eliminated sliver polygons created by overlapping polygons along mapsheet boundaries. Checked for and corrected label errors.