Series
Name:
CanMap RouteLogistics
DMTI Spatial Inc. Markham Ontario,
Canada
Themes or Categories of the Resource: transportation
Keywords:
Elevation, Relative Elevation, Node, Intersection, Dangle, Dead End, Road Levels, Connectivity, 3D, Overpass, Underpass, From Node, To Node, Latitude, Longitude, Turn Restriction, Physical
ROADS
Roads, Road transportation, Réseau routier, Transport routier
Place Keywords:
Continent > North America > Canada
Purpose:
A nation-wide point file consisting of all nodes and their corresponding elevation.
Dataset Language:
eng; CAN
Status: completed
Update Frequency: quarterly
Spatial Representation Type: vector
Processing Environment:
Native Dataset Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 8.3.0.800
Extent
West Longitude: -141.001449
East Longitude: -52.623656
North Latitude: 82.514468
South Latitude: 41.436108
Supplemental Information:
Starting with v5.1 the existing node layer (NDE) containing only To and From Node information will no longer exist. Instead, the Relative Elevation Nodes (REN) layer was created, a layer containing the To and From Nodes, their associated co-ordinates (Latitude and Longitude) and whether or not they exist at an intersection (True or False). The reasoning behind creating this base information prior to the relative elevation nodes creation is to prevent the generation of two separate Routing products. Relative elevation is a new constraint has been added as an enhancement to the previously existing node point layer. The basis of this enhancement is to mimic the existing turn restriction table, on a per release basis, to indicate where physical turn restrictions exist. This is done determining where turns cannot be made between two polylines that share a common end-point node, where an underpass overpass situation exists, thus creating an elevation change.
DMTI Spatial Inc Markham Ontario,
Canada