Road Atlas of British Columbia 

• Methodology
• Address Version
• Navigation Version
• Display Version
• Positioning Accuracy
• Statistics
• Maintenance Schedule
• Pricing

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Address Version:
The Address Version is composed of three layers:

Roads Layer:

• Geometry (lines) weeded to 1.5 m standard, at a +/- 2 m(1d) positional accuracy up to 10 m (2d)

• LOCATE attributes of regional district left & right, city left & right, route #, street name and alias, and address range

Facilities Layer:

• 9-1-1 stations, such as police, fire and ambulance stations

• Key health-emergency facilities;  such as hospitals

• Key transportation links like airports, ferry terminals, helipads

• Key bridges and tunnels, customs, weigh scales, tollbooths, etc.

• Public structures such as schools & colleges, community centres, courts & jails, stadiums and arenas

• Civic and Regional District outlines (approximate), Public Parks and campgrounds

• Selected landmarks and private places, such as major malls.

Enhanced Base Map Layer:

This layer consists of original work and selected data licensed from GDBC, such as 1:20,000 provincial TRIM maps and Geographical Names database.

• Hydrography:  coast line, lakes, rivers, streams

• Hydrographic Structure:  canals, seawalls, dykes, piers, breakwaters

• Industrial sites and utility corridors:  pipelines, transmission lines

• Rail: lines, LRT, abandoned track

Street & Address Attributes

Road Class	Freeway, Arterial, Collector, Local, Strata, Lane, Restricted, Resource, Recreation, Ferry
Road/Alias Name	Road names are managed in a structured table containing separate fields for:  Feat_id, pre-type, dir-prefix, name, type, dir-suffix, and a "structure" field.  Normally the format of the Road Name is matched to the core GIS technology delivered, such as for MapInfo or ArcView.  Upon request, the parsed Name_Table is available for users who need to specially parse or change the naming conventions used.
Naming Standards	Road type mostly conform to Canada Post, with some BC extensions like FSR.
Hwy_Rte	The "Numbered Highways" field lists the routes in order, e.g. "1A+99A"
Addressing	Addressed by the 4-corners, From-Left, To-Left, From-Right, To-Right.
Single Address	For roads where all the residents share one civic address, such as in a strata road.
Addressed L & R	A series of codes describing the addressing as Even, Odd, Continuous, Special or None
City, L & R	The colloquial name used.  Not the official name as people who live just outside a community limit still refer to that community as their address.  The official name is in progress.
Regional District, L & R	Regional District left and right.

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Navigation Version:
The Navigation Version includes the Address Version plus Roads Layer:

• NAVIGATE attributes like speed limits, surface one way restrictions, turning restrictions, height & weight limits etc.

• NETWORK attributes:  from & to nodes, angular relations, segment length, the cross-street names, etc.

Navigation Attributes

Speed	In kph as: 20, 30, 40, 50, 60, 70, 80, 90, 100, 110
Travel Direction	Both, One Way Forward-Reverse, Divided Forward-Reverse
Surface	Paved, Loose, Boat
Lanes L & R	Lanes are separately recorded for both directions of travel, based upon the vector direction.  The codes are:  R = very restrictive, N = narrow (shared), and 0,1,2,3,4.
From & To Stops	Travel impedance:  Stop, Yield, Light, Roundabout, Underpass, Overpass, Rail crossing
Truck Limits	The maximum truck Height (m), Width (m), & Weight (t)
Restricted Access Road	Codes for road restrictions, private usage and so forth
Turn Restrictions	At both the From & To ends, recorded for each of:  NO Left, Right or Straight, recorded as per days as:  Mon-Fri, Mon-Sat, Sun-Sat.
Turn Times	Recorded as AM, PM, both AM-PM, and always.
Network Topology	From & To Nodes, entry & exit angles, segment length
Supplemental Tables	Cross street lookups and more.

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Display Version:
The Display Version is like the Address Version but  contains no street addresses.
 

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Positioning Accuracy

Positional Accuracy	Mostly (65%) 2-3m, (95%) less than 5m, (99%) less than 10m of positional error
Positioning Method	Differentially corrected kinematic GPS combined with inertial systems
Positioning Supplement	TRIM (under license for this usage), NTDB, and the cadastre for much of BC
Weeding & Topology	Co-linear vertices of less than 1.5m of deflection are removed.  Topology clean in 2D.
Vector Direction	The road segment (arc) is vectorized in the direction of increasing addressing.

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Statistics

Roads Covered	As of February 2001 there are about 58,000 km of roads (166,000 road segments)
Field Data	Includes 1.27 million records of data captured on the road

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Maintenance Schedule:

The following schedule is used by GIS Innovations Ltd. to maintain the streets of British Columbia:

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Pricing:
 
Single User

Multi User

Users	Multiplier
1	1.00
2	1.25
3-4	1.75
5-6	2.00
7-9	2.60
10-14	3.00
15-21	4.00
22-30	5.00
Corporate	Negotiable

All prices are in Canadian dollars

• www server licenses negotiable
• Users refers to all users of the data direct and data derivatives.  This means all users, full time, casual or temporary.  This also means any usage of the data, such as within a GIS, sample images such as mini-plots at a "front counter", and derivatives such as accessing the list of valid road names.  This licensing is NOT concurrent users, where you count the users accessing the data at one time. 

 
Subscription Maintenance

Monthly Updates (12 per year)	50% of current list price
Annual Update (1 per year)	30% of current list price
3 years of Annual Updates (1 per year)	75% of current list price