Digitising Hawkesbury Area Kerb & Gutter

The dataset I'm working on this week is the kerb and gutter. It is typically made of concrete and consists of a gutter for stormwater to flow into drainage systems.

Kerb and cutter is a road infrastructure asset that is maintained by the local council or the NSW Roads and Maritime Service (RMS). Kerb and Gutters (K&G) have standard shapes according to the RMS's kerb and gutter design reference document on their website.

As a spatial information professional I need to be aware of what needs to be digitised and what it looks like on aerial photography.

The ideal symbology to use to represent K&G is a polyline. Then I need to determine who owns what. After preliminary research I've determined that the K&G where the driveway is belongs to the local council. In a development application they are required to connect their property to the road, and they pay for the construction of the driveway but the asset belongs to the local council.

Basically this means that I will digitise the K&G as a continuous line over the driveways rather than as a series of broken lines:

Kerb and gutter without driveways

Kerb and gutter continuous

Digitising Workflow

When I first joined Hawkesbury City Council I requested a dual monitor setup to deal with the array of tools in ArcMaps. I like to situate the main window in front of me and the tools and reference information to the secondary monitor.

Click to enlarge

My workflow is as follows:

  1. Start editing features in ArcMaps. Select the relevant feature symbology using the Create Features Window.

    Make sure your Editor Toolbar and Snapping Toolbars are enabled. You will need to toggle snapping nodes on or off as you trace the kerb and gutters. Make K&G layer the only selectable feature if you have a shit ton of layers in your base map (like I normally do). This prevents you from accidentally selecting other underlying layers or moving and editing the wrong layers.

  2. Refer to the aerial photography and trace the kerb and gutter using a combination of end point arc segments and straight segments. Finalise your sketch.

  3. Check the reference spreadsheet for the relevant attributes

  4. Fill the attributes against the relevant features. The kerb and gutter asset has the following fields: roadid_blockno, roadid, blockno, street_name, suburb and asset_rid. These are fairly straight forward but the most important one is the asset_rid as this can be used to join with the corporate asset database.

  5. I find that editing the attributes directly in table window can be sluggish, so I tend to use the standalone attributes window. You can enable this from the Editor Toolbar. The button is the third last button from the right.

  6. Make a sight check to validate the information you've entered into the attributes. Make sure you also check against the source information in the spreadsheet. If you need to refresh the cache you can select the menu options and click reload cache. If you've hidden any fields and reload cache doesn't refresh the table, you can also use restore default column widths.

Once you've finalised your edits, make sure you save the changes.

This concludes the kerb and gutter workflow tutorial.

esri, arcgis, digitising, kerb & gutter, road infrastructure, spatial maintenance, database management