SLKs or Straight Line Kilometers are a location reference system used by Main Roads Western Australia to define the location of features or events along a road. This layer shows SLK points (every 100m) along the left and single carriageways for all State and Local Roads, Main Roads controlled paths contained within the road centreline of Main Roads road asset database. The purpose of this layer is to identify and label the measure of SLK along a particular route and is provided for information only. The SLK points are based on geometric measure and include points of equation. This means that you may notice “jumps” in the SLK between two points that are not equal to 100m. This is as a result of network changes that have been incorporated into the spatial road centr eline.A point of equation is a business term used to describe a point on the road network, which has two SLK references, one for the section leading up to it, and one for the section leaving from it. A Point of Equation is either: • A gap, which occurs when the new deviation/realignment is built shorter than the existing road. An SLK range is missing. • An overlap, which occurs when the new deviation/realignment is built longer than the existing road. An SLK range is duplicatedNote that you are accessing this data pursuant to a Creative Commons (Attribution) Licence, which has a disclaimer of warranties and limitation of liability. You accept that the data provided pursuant to the Licence is subject to changes. Pursuant to section 3 of the Licence you are provided with the following notice to be included when you Share the Licenced Material:- The Commissioner of Main Roads is the creator and owner of the data and Licenced Material, which is accessed pursuant to a Creative Commons (Attribution) Licence, which has a disclaimer of warranties and limitation of liability. Creative Commons CC BY 4.0Data Dictionary

Field Name
Type
Description


ObjectID
OID
System generated unique number, overridden on data update


Shape
Point M
System generated identifier for shape type


RoadCway
Text,255
Concatenation of Main Roads Road Number and Carriageway columns. Used to generate unique routes per road carriageway combination.


SLKMin
Double
The maximum SLK (measure) of the RoadCway


SLKMax
Double
The maximum SLK (measure) of the RoadCway


SLKGen
Double
The SLK measure generated at 100m intervals (0.1, 0.2 etc..)


POINT_X
Double
The Longitude of the SLK point


POINT_Y
Double
The latitude of the SLK point


StreetviewURL
Text.100
A Google Maps Streeview URL link to the SLK point on the road


RoadSLK
Text,50
A concatenation of the RoadCway and SLKGen columns


Road_Name
Text, 80
The Main Roads route name of the road


Common_Usage_Name
Text, 80
The name of the road


RN_SLK
Text, 100
A concatenation of the Road_Name and SLKGen columns


CN_SLK
Text, 100
A concatenation of the Common Usage Name and SLKGen columns

SLKs or Straight Line Kilometers are a location reference system used by Main Roads Western Australia to define the location of features or events along a road. This layer shows SLK points (every 100m) along the left and single carriageways for all State and Local Roads, Main Roads controlled paths contained within the road centreline of Main Roads road asset database. The purpose of this layer is to identify and label the measure of SLK along a particular route and is provided for information only. The SLK points are based on geometric measure and include points of equation. This means that you may notice “jumps” in the SLK between two points that are not equal to 100m. This is as a result of network changes that have been incorporated into the spatial road centr eline.A point of equation is a business term used to describe a point on the road network, which has two SLK references, one for the section leading up to it, and one for the section leaving from it. A Point of Equation is either: •A gap, which occurs when the new deviation/realignment is built shorter than the existing road. An SLK range is missing. •An overlap, which occurs when the new deviation/realignment is built longer than the existing road. An SLK range is duplicatedNote that you are accessing this data pursuant to a Creative Commons (Attribution) Licence, which has a disclaimer of warranties and limitation of liability. You accept that the data provided pursuant to the Licence is subject to changes. Pursuant to section 3 of the Licence you are provided with the following notice to be included when you Share the Licenced Material:- The Commissioner of Main Roads is the creator and owner of the data and Licenced Material, which is accessed pursuant to a Creative Commons (Attribution) Licence, which has a disclaimer of warranties and limitation of liability. Creative Commons CC BY 4.0Data Dictionary

Field Name
Type
Description


ObjectID
OID
System generated unique number, overridden on data update


Shape
Point M
System generated identifier for shape type


RoadCway
Text,255
Concatenation of Main Roads Road Number and Carriageway columns. Used to generate unique routes per road carriageway combination.


SLKMin
Double
The maximum SLK (measure) of the RoadCway


SLKMax
Double
The maximum SLK (measure) of the RoadCway


SLKGen
Double
The SLK measure generated at 100m intervals (0.1, 0.2 etc..)


POINT_X
Double
The Longitude of the SLK point


POINT_Y
Double
The latitude of the SLK point


StreetviewURL
Text.100
A Google Maps Streeview URL link to the SLK point on the road


RoadSLK
Text,50
A concatenation of the RoadCway and SLKGen columns


Road_Name
Text, 80
The Main Roads route name of the road


Common_Usage_Name
Text, 80
The name of the road


RN_SLK
Text, 100
A concatenation of the Road_Name and SLKGen columns


CN_SLK
Text, 100
A concatenation of the Common Usage Name and SLKGen columns

Introducing the new and improved Main Roads GPS-SLK app, putting network location accuracy at your fingertips. The GPS-SLK app is backed by a dedicated support team and offers a number of functional benefits, which will continue to grow and evolve to meet future demands.Its features include: •Compatibility with iOS and Android (download anytime via the App Store or Google Play) •Location data for State and Local roads •Location data for cycle paths •Offline usage when GPS is enabled (no data, no worries) •Improved location sharing functionality with photo capture •Improved data update notifications Make sure to contact our team with any feedback, so we can keep improving the app! See Frequently Asked Questions for more information.

Note: Download the File Geodatabase for the m-aware network. The m-aware shapefile can be downloaded from here.

The purpose of this layer is to identify and label the measure of SLK along a particular route, at a particular scale, and is provided for information only. Note that you are accessing this data pursuant to a Creative Commons (Attribution) Licence which has a disclaimer of warranties and limitation of liability. You accept that the data provided pursuant to the Licence is subject to changes. Pursuant to section 3 of the Licence you are provided with the following notice to be included when you Share the Licenced Material:- The Commissioner of Main Roads is the creator and owner of the data and Licenced Material, which is accessed pursuant to a Creative Commons (Attribution) Licence, which has a disclaimer of warranties and limitation of liability. Creative Commons CC BY 4.0

Special Use roads are public roads administered by Local Governments, which have a separate use in addition to their typical Road Hierarchy function. Categories of Special Use roads include Aboriginal Access Roads, Industrial Roads and Laneways. Aboriginal Access Roads typically are the main access roads to Aboriginal communities; Industrial Roads are found in designated industrial areas, and Laneways are typically short narrow roads providing access to residential areas. Data DictionarySUSE - Special Use Table Special Use name type alias sqlType length Description

ABORIGINAL ACCESS

Aboriginal Access Road

A Local Government road that is the main access road to a remote Aboriginal community.

INDUSTRIAL

Industrial Road

A Local Government road that carries a greater proportion of heavy vehicles, typically connecting to or located within a designated industrial area

LANEWAY

Laneway

A Local Government road or carriageway that typically accesses the rear or side of lots for residents or service vehicles. Laneways are narrower and carry less traffic than the surrounding road network.

name type alias sqlType length Description

OBJECTID esriFieldTypeOID OBJECTID sqlTypeOther 4 Unique record identifier. Default ESRI field.

ROAD esriFieldTypeString Road sqlTypeOther 30 Main Roads Road Number

ROAD_NAME esriFieldTypeString Road Name sqlTypeOther 240 Name given to road by Main Roads

COMMON_USAGE_NAME esriFieldTypeString Common Usage Name sqlTypeOther 240 Name of the road (approved by Landgate)

START_SLK esriFieldTypeDouble Start SLK sqlTypeDouble 8 Minimum SLK (chainage/measure) of the road

END_SLK esriFieldTypeDouble End SLK sqlTypeDouble 8 Maximum SLK (chainage/measure) of the road

CWY esriFieldTypeString CWY sqlTypeOther 6 Carriageway (L - Left, R - Right, S - Single)

START_TRUE_DIST esriFieldTypeDouble Start True Dist sqlTypeDouble 8 Minimum geometric measure of the road

END_TRUE_DIST esriFieldTypeDouble End True Dist sqlTypeDouble 8 Maximum geometric measure of the road

NETWORK_TYPE esriFieldTypeString Network Type sqlTypeOther 30 Type of network (examples include State Road, Local Road etc)

RA_NO esriFieldTypeString Main Roads Responsibility Area No. sqlTypeOther 2 Main Roads responsibility area (or region) number

RA_NAME esriFieldTypeString Main Roads Responsibility Area Name sqlTypeOther 30 Main Roads responsibility area (or region) name

LG_NO esriFieldTypeString Local Government No. sqlTypeOther 3 Local government area number

LG_NAME esriFieldTypeString Local Government Name sqlTypeOther 30 Local government area name

SPECIAL_USE esriFieldTypeString Special Use sqlTypeOther 20 Special use in addition to the Road Hierarchy of Local Government roads (examples Aboriginal Access, Industrial, Laneway)

ROUTE_NE_ID esriFieldTypeInteger Route ID sqlTypeInteger 4 Route identifier

GEOLOC.STLength esriFieldTypeDouble GEOLOC.STLength() sqlTypeDouble

Geometry Location