Australian Height Datum

Australian Height Datum - Factbites
Where results make sense
About us | Why use us? | Reviews | PR | Contact us

Topic: Australian Height Datum

Note: these results are not from the primary (high quality) database.

In the News (Mon 28 May 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	The Western Australian Centre for Geodesy: homepage
		Australian Height Datum Elevations from GPS and Gravity Measurements.
		The influence of gravity and topographic mass desnity on heights in the view of a redifining the Australian Height Datum.
		2000 Western Australian Department of Land Administration consultancy.
	www.cage.curtin.edu.au /~geogrp/grants.html

	National Mapping - Geocentric Datum of Australia (GDA)
		Australia's vertical datum is the Australian Height Datum [AHD] which approximates mean sea level and was determined by monitoring tide gauges around the Australian coastline.
		This page looks at what a datum change actually means and why we have adopted a new datum.
		Australia has changed the way it references geographic positions on its maps to accord with a the global coordinate reference system that is directly compatable with the Global Positioning System (GPS).
	www.agso.gov.au /nmd/geodesy/datums

	SUM: GEN- geographic datum?
		A "datum" is a combination of three things: a spheroid, a "height datum" (we use Australian Height Datum, or AHD66), and an origin place where the coordinates have been "arbitrarily" assigned (we use Johnson Station near Alice Springs).
		Datum is the starting point, or definition for a projection to begin.
		There is also a description in 'Using the three-parameter method in North America' on or around page 12 of 'Datums and datum conversion' in the Map Projections book for 7.0 or in ArcDoc.
	corc-practice.oclc.org:5103 /esri/msg01852.html

	Australian Tides Manual
		The resulting datum surface, with minor modifications in two metropolitan areas, has been termed the Australian Height Datum (AHD) and was adopted by the National Mapping Council at its twenty-ninth meeting in May 1971 as the datum to which all vertical control for mapping is to be referred.
		Another problem discussed on Section 2.2 is that of datum control with pressure gauges, particularly in light of the general tendency of the transducers to drift.
		Chart recorders are gradually being replaced by some form of shaft encoder coupled with a digital recording device.
	www.icsm.gov.au /icsm/tides/SP9/SP920041116.html (7332 words)

	gloss062.txt
		Benchmark Tide Gauge Zero (TGZ) = Admiralty Chart Datum relationships (ACD) TGZ = 3.975m below Australian Height Datum (AHD) TGZ = 10.335m below BM 70/8 Auxiliary benchmarks BM 100: 10x30mm brass block with identification tag set in concrete retaining wall at the abutment of Stokes Hill Wharf.
		Data aquisition rate Recording at 6 minute intervals - average of 30 second samples TGBM description BM 70/8 bronze plaque at ground level behind kerb at corner of Kitchener Drive and the boom shed road.
	www.nodc.noaa.gov /woce_V2/disk09/glosshb/gloss062.txt (240 words)

	GLOSS Station Handbook Information Sheet - Portland, Australia
		Portland (PM) 390 / BM38-81 3D Brass pin in concrete at the northern end of the K S Anderson Wharf 3D 2.943m above the Australian Height Datum and 3.450m above Chart Datum.
		Portland (PM) 393 / P203-1H = Coastal Array; Primary BM = 3.517m AHD
		Portland (PM) 387 (HSM) /1464-2H = 3.408m AHD
	www.bodc.ac.uk /services/glosshb/stations/gloss055.htm (240 words)

	The River Murray System - Design and Operation of Hume Dam
		The capacity of the Hume Reservoir is 3 038 gigalitres at a full supply level of 192 m relative to the Australian Height Datum.
		Hume Reservoir is used as the primary storage for the River Murray while Dartmouth is primarily used as a drought reserve.
		Hume Dam consists of four embankments and a concrete spillway section.
	www.mdbc.gov.au /river_murray/river_murray_system/hume/hume_design.htm (1024 words)

	espace@Curtin - Evidence of a north-south trend between AUSGeoid98 and AHD in southwest Australia
		The spirit-levelled heights were tied to the Australian Height Datum(AHD)using class C techniques [12mm-root-km allowable misclose].
		This is arguably the best subset of GPS-derived ellipsoidal heights in Australia with na internally estimated precision of < +-9mm.
		The AUSGeoid98 gravimetric model has been compared with 48 GPD-levelling points at a ~50km spacing across part of the southwest of Western Australia.
	espace.lis.curtin.edu.au /archive/00000036 (1024 words)

	Geoscience Australia: Geodesy - Australian Height Datum [AHD]
		The resulting datum surface, with minor modifications in two metropolitan areas, has been termed the Australian Height Datum (AHD) and was adopted by the National Mapping Council at its twenty-ninth meeting in May 1971 as the datum to which all vertical control for mapping is to be referred.
		Mean sea level for 1966-1968 was assigned the value of zero on the Australian Height Datum at thirty tide gauges [gif_6k] around the coast of the Australian continent.
		Geoscience Australia: Geodesy - Australian Height Datum [AHD]
	www.ga.gov.au /nmd/geodesy/datums/ahd.jsp (644 words)

Try your search on: Qwika (all wikis)

Topic: Australian Height Datum

Ads by Google

Related Topics

In the News (Mon 28 May 12)