Direct lookup links and AI assistants

Open the map at a point

https://chainage.com.au/?lat=-27.4705&lon=153.026

Opens the map with a pin dropped on those coordinates and its chainage card open. Use decimal degrees, latitude first. It's the same kind of link the Share button makes (see Share a location).

What's the chainage here?

https://chainage.com.au/at/-27.4705,153.026

Gives a simple page with the answer in one sentence and a table: the road, section, carriageway, chainage, distance to the road, traffic figures and the nearest TMR speed sign. Open on the map shows it in the app. Points outside Queensland get a note saying so.

Where is this chainage?

https://chainage.com.au/ch/10A/25.306

Shows where chainage 25.306 km on road section 10A is, with its coordinates. You can also:

• write the chainage as km+m: https://chainage.com.au/ch/10A/25+306;
• add a carriageway code: https://chainage.com.au/ch/10A/25.306/2. Without one, carriageway 1 is used, then 2, then 3.

A chainage past the end of the section gives the end of the section, with a note. These links work for TMR road sections, not council roads.

JSON and spreadsheets

Add .json to the end of an /at/ or /ch/ link to get the result as JSON, for example https://chainage.com.au/ch/10A/25.306.json.

In Excel or Google Sheets, build a clickable link from your columns with HYPERLINK. With the section in A2 and the chainage in km in B2:

=HYPERLINK("https://chainage.com.au/ch/"&A2&"/"&B2, "Open in Chainage")

With latitude in C2 and longitude in D2:

=HYPERLINK("https://chainage.com.au/?lat="&C2&"&lon="&D2, "Map")

AI assistants

AI assistants that can browse the web, such as ChatGPT, Claude, Gemini and Perplexity, can use these links to answer chainage questions and give you a map link with the pin dropped on the answer. For example, ask: “What's the chainage at -27.4705, 153.026? Look it up at https://chainage.com.au/at/”.