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Canberra height datum?

By dk24 - 3 March 2011 11

Can anybody tell me the Canberra height datum for my tech assignment?

[ED – Can anyone tell me what a Canberra height datum is?]

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11 Responses to
Canberra height datum?
astrojax 1:29 pm 04 Mar 11

Affirmative Action Man said :

Thats wots wrong with the world. Nobody uses simple language anymore – I mean DATUM !!!WTF

and i suspect you’re the sort who gets outraged at vandalism on the walls and call it graffitti, when you’re outrage is a piece of graffitto..? 😉

georgesgenitals 8:26 pm 03 Mar 11

Affirmative Action Man said :

Thats wots wrong with the world. Nobody uses simple language anymore – I mean DATUM !!!WTF

It’s the singular of data.

LSWCHP 7:18 pm 03 Mar 11

Affirmative Action Man said :

Thats wots wrong with the world. Nobody uses simple language anymore – I mean DATUM !!!WTF

It’s a very useful word. IN the world of geospatial information systems it expresses in two syllables a complex group of concepts that would otherwise take several sentences to write down. It’s like saying “car” versus “A mechanical contrivance, usually with 4 wheels and an engine used for moving people and goods….etc”.

Unfortunately, I’m not quite sure the OP is using the word correctly.

Affirmative Action M 6:08 pm 03 Mar 11

Thats wots wrong with the world. Nobody uses simple language anymore – I mean DATUM !!!WTF

ma7trlb 3:49 pm 03 Mar 11

The ACT, as with the rest of mainland Australia uses the Australian Height Datum (1971) – http://www.ga.gov.au/earth-monitoring/geodesy/geodetic-datums/australian-height-datum-ahd.html

The best reference for ACT Datum information etc is the ACTPLA survey section – http://www.actpla.act.gov.au/tools_resources/maps_land_survey/surveying_data/surveyors_information

Bit of an odd question tho’ – A better question would be what coordinate system does Canberra use? This would require a more detailed answer – which is in the ACTPLA link above 😉

astrojax 12:50 pm 03 Mar 11

not sure if this helps? http://en.wikipedia.org/wiki/LIDAR

p1 11:41 am 03 Mar 11

The Geoscience Australia website has lots of data sets available for download, in lots of formats depending on the application you are after. The 250k scale Canberra GIS Dataset is here.

phillystyle 11:33 am 03 Mar 11

Looking on wiki it says:

“The Australian Height Datum is a geodetic datum for altitude measurement in Australia”

There’s more about datums on wiki – http://en.wikipedia.org/wiki/Datum_(geodesy)

This might help more though?

http://www.ga.gov.au/earth-monitoring/geodesy/geodetic-datums/GDA.html

Skidbladnir 11:30 am 03 Mar 11

Yes.
Contact:
Principal Officer
ACT Land Information Centre
ACT Planning and Land Authority

ACTPLA are sitting on the ACT Airborne Laser Scanning Digital Elevation Model, which is accurate to 30cm vertical, 3m point density, and is broken down into ground and non-ground data sets.
It covers the Canberra urban area.

It would be a specatcular addition to ACTMapi.

(Otherwise ACTMapi has ~5m accuracy contour data, with 20m point density precision)

breda 11:02 am 03 Mar 11

Additional to my post – I got the 574m figure from a book I happen to have lying around, but Google tells me it can be more, depending on where in town you are (obviously). The 574 number relates to Civic, I think.

breda 10:58 am 03 Mar 11

It could mean the height above sea level (574m). Or it could mean something to do with building heights, in which case it’s Rafferty’s rules.

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