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 lines based on the ccsm_code attribute. Put the arcs for each category to respective ARC/INFO coverages then joined all transportation line layers into one coverage and cleaned with tolerances of 0.01.
Appended mapsheet transportation line 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.
Deleted dangles that were less than two meters in length. Cross-checked transportation line geometry with orthophotos and paper maps and made edits accordingly. Named roads and classified them by surface type by referring to up-to-date road maps from the rural municipalities of Morris, Ritchot, Rhineland, Hanover, Franklin, Tache, Montcalm, Desalaberry, and Macdonald.
Assigned attributes to transportation lines from the Manitoba Department of Highways municipal road and highway layers by snapping the layers to the transportation line coverage and performing spatial joins to transfer the attributes. The municipal road layer snapped to transportation lines using a snap tolerance of 1 meter. The highway layer required a snap tolerance of 5 meters. Manually assigned attributes to the transportation lines that were spatially related to the municipal road or highway layers but were not captured in the spatial join.
Grouped transportation lines into five classes (rail, dirt, municipal, highway, TransCanada) by considering road number, surface type, feature type, and municipal road or highway distinction. Fords and bridges were coded based on the class of adjacent arcs.
Rail: · Feature type is rail line
Dirt: · Surface type is earth · Surface type is unknown but feature type is trail (footpath, bicycle), cart track, portage trail, dry weather road, unclassified road. · Pedestrian and cycle bridges not affiliated with a road or trail
Municipal: · Spatially related to the municipal roads in the Manitoba Department of Highways layer · Surface type is gravel · Surface type is unknown but feature type is gravel road, boardwalk, accessway · Paved roads, back lanes, under construction roads within residential areas, towns, or cities
Highways: · Spatially related to the highways in the Manitoba Department of Highways layer · Approaches and clover leafs
TransCanada: · Road number 1 or 100