Table of Contents

Go to top Geophysical Archive Data Delivery System (GADDS) Access and Support

To access GADDS go to here.

To view this help page, choose Help in the header of any GADDS window.

For technical support, use one of the following options:

Go to topStep 1—Define an area of interest

Use the Search window to define your area of interest. The Map Control in the Search window starts with the Irish coastline and waters theme. You cannot turn this layer off. Add or remove additinal map information using the Additional layers check boxes. See 1.1.1 Additional Layers.

There are three ways to define and area of interest:

Geophysical Archive Data Delivery System main search window
Geophysical Archive Data Delivery System main search window

Go up to Step 1 1.1 Map Control

To define your area of interest visually, use the following operations in the Map Control:

OperationMethod
QueryDrag a rectangle to select an area of interest.
Zoom inDrag a rectangle that you want to enlarge.
Zoom outChoose Show all of Australia.
PanClick a spot to move it to the centre of the view OR
Use the navigation arrows around the edge of the map
View other layersCheck Additional layers check boxes (see 1.1.1 Additional Layers).

When you have defined your area of interest, choose Proceed to download. See Step 2—Data Type and Theme Window.

Go up to 1.1 Map Control 1.1.1 Additional Layers

The check boxes under the Additional Layers heading enable you to view additional data as layers in the Map Control. For example, you can view the InfoMar data coverage layer.

To change the layer display, check or clear the check boxes as required and then choose Load checked layers.

Go up to Step 1 1.2 Lat Long Rectangle, Quick Start (map sheets)

To define your area of interest using coordinates or map sheets, enter search coordinates in the Lat Long Rectangle text boxes. OR
In Quick start, select a 1:250k map sheet from the drop down list to search for datasets covering that sheet.

When you have defined your area of interest, choose Proceed to download. See Step 2—Select data type, region and theme.

Go to top Step 2—Select data type, region and theme

The Select data type, region and theme window displays the geodetic coordinates selected and enables you to select from option buttons or drop down lists:

Select data type, region and theme window
Select data type, region and theme window

Select the data type and theme then press Next. See Step 3—Select datasets for download.

Go to top Step 3—Select datasets for download


3.1 Introduction

The Available datasets window shows all available datasets that match your defined area of interest, data type, region and theme.

For each dataset or report, the GADDS system:

Steps:

  1. Preview datasets or reports as required. See 3.1.1 Preview datasets.
  2. Select datasets or reports for download.
  3. For each selected dataset, select the download options, including datum and projection.
  4. For vector datasets select the download format.
  5. Choose Next.

Available datasets window
Available datasets window

Go up to 3.1 Introduction 3.1.1 Preview datasets

To preview a dataset, choose the Preview image link in the dataset record's Additional information section.

The image appears in reduced size, but you can save a full sized copy. From the image's shortcut menu (right click) choose Save Image As.

Ddataset preview window
Dataset preview window

Go up to Step 3 3.2 Grid datasets

For each grid dataset that you want to download, check the Download this grid check box. To prevent unnecessary downloading, make sure that you only check Download this grid for the datasets that you require.

For each grid dataset download, select:

Grid dataset list item.
Grid dataset list item

Go up to Step 3 3.3 Vector Datasets

For each vector dataset that you want to download, check the Download this dataset check box.

We supply all vector datasets at full dataset resolution. To prevent unneccessary downloading, make sure that you only check Download this dataset for the datasets that you require.

For each vector dataset selected:

Vector dataset list item
Vector dataset list item

At the bottom of the available dataset list, select the download format that you require (INTREPID database or ASCII).

End of vector dataset list
End of vector dataset list

See the following sections for descriptions column (field) names.

Go up to 3.3 Vector Datasets 3.3.1 Field Name Definitions

Each vector dataset type has standard column (field) names.

In this section:

More field definitionsField names and descriptions for magnetic datasets:

Field NameDefinition
altitudeMeanNominal survey altitude in metres above sea level
bearingNominal line or tie bearing in degrees (0-359) measured east of true north
dateCodeDate line or tie was acquired—yyyymmdd
FIDFiducial at sample in data record
fidFactorFiducial size in seconds (Factor to convert fiducial increment into seconds).
flightFlight number for line or tie
groundClearanceNominal survey altitude in metres above ground level
latitudeLatitude in degrees
LINEUnique line or tie number
longitudeLongitude in degrees
microlevelledAs for residual and also microlevelled
residualLevelled total magnetic intensity – IGRF + 5000nT
surveyUnique survey number identification
timeOfDayTime of day at fiducial zero in seconds
gridflagGridding flag 1=ignore, 0=use. Indicates whether the data point was used in grid generation

More field definitionsField names and descriptions for radiometric datasets:

Field NameDefinition
altitudeAltitude in metres above ground level of survey aircraft
altitudeMeanNominal survey altitude in metres above sea level
bearingNominal line or tie bearing in degrees (0-359) measured east of true north
dateCodeDate line or tie was acquired—yyyymmdd
FIDFiducial at sample in data record
fidFactorFiducial size in seconds (Factor to convert fiducial increment into seconds).
flightFlight number for line or tie
groundClearanceNominal survey altitude in metres above ground level
latitudeLatitude in degrees
LINEUnique line or tie number
longitudeLongitude in degrees
potassiumPotassium (counts/sec OR pctK)
surveyUnique survey number identification
thoriumThorium (counts/sec OR ppmTh)
timeOfDayTime of day at fiducial zero in seconds
totalcountTotal count (counts/sec OR nanoGrays/hour)
uraniumUranium (counts/sec OR ppmU)

More field definitionsField names and descriptions for elevation datasets:

Field NameDefinition
altitudeMeanNominal survey altitude in metres above sea level
bearingNominal line or tie bearing in degrees (0-359) measured east of true north
dateCodeDate line or tie was acquired—yyyymmdd
FIDFiducial at sample in data record
fidFactorFiducial size in seconds (Factor to convert fiducial increment into seconds).
flightFlight number for line or tie
groundGround elevation in metres above sea level
groundClearanceNominal survey altitude in metres above ground level
latitudeLatitude in degrees
LINEUnique line or tie number
longitudeLongitude in degrees
planeAircraft elevation in metres above ellipsoid
surveyUnique survey number identification
timeOfDayTime of day at fiducial zero in seconds

More field definitionsField names and descriptions for gravity datasets:

Field NameDefinition
projectSurvey number unique to each survey
obsnoOracle database generated unique number
stationnoStation number (includes project number)
stationnameName of station
stationtypeType of station eg. absolute, base, control, ground, helicopter etc.
dlongLongitude
dlatLatitude (negative) for the southern hemisphere
posunitsPosition units (degrees, decimal degrees)
acc_locEstimate of accuracy of the position, in metres
datumPosition datum
spheroidSpheroid used defined by the datum
posmethodMethod used to position the station eg. digitised from map, GPS, etc.
elevationElevation of ground at the station (metres above sea level)
elevunitsUnits of the elevation
acc_htEstimate of accuracy of the elevation, in metres
elevdatumElevation datum
elevmethodMethod used to define elevation eg. barometer, map, GPS, etc.
elevtypeElevation description eg. land, marine, underground etc.
obsdateDate observation was made
countryidCountry observation was made in eg. Aus., PNG etc.
gravObserved gravity value
gravunitsUnits of the observed gravity
acc_guEstimate of the accuracy of the observed gravity
gravdatumObserved gravity datum
calcdateDate gravity data were processed
gravmethodGravity meter used eg. LaCoste-Romberg, Scintrex etc.
gmeteridGravity meter serial number
heightHeight of the gravity meter at the observation point
heighterrorEstimate of the accuracy of the meter height
heightmethodMethod used to obtain the height of the meter
tcTerrain correction
tcerrorTerrain correction accuracy estimate
tcmethodMethod used to calculate the terrain corrrection eg. Hammer hand, Intrepid software etc.
tcdensityDensity used in the terrain correction
confidConfidentiality status of the station eg. open or embargoed
reliabEstimate of the overall reliability of the reading (0 = unreliable, 7 = high reliability)
statusStatus of the station (original or active)
commentsComments made when observing the station
parentShows either '-1' for the original version of the station that has been converted, or the obsno of the station from which it has been converted
freeairFree Air Anomaly value
bouguerBouguer Anomaly value at 2.67 tonne/cubic metre

More field definitionsField names and descriptions for airborne gravity datasets:

Field NameDefinition
ProjProject Number
FltFlight Number
LineLine Number
FidFiducial
DateDate (yyyymmdd)
BrgBearing (degrees East of North)
LongFinal Longitude (degrees, GDA94)
LatFinal Latitude (degrees, GDA94)
LatRadFinal Latitude (radians, GDA94)
mga53EFinal Easting (metres, GDA94,MGA53)
mga53NFinal Northing (metres, GDA94, MGA53)
GPSHtGPS Height above WGS84 Ellipsoid (metres)
GPSTimeGPS time (seconds since start of day)
CSatsCoarse Channel Saturations (1=saturation, 0=no saturation)
FSatsFine Channel Saturations (1=saturation, 0=no saturation)
RawFA???Raw Relative Free Air Anomaly (Unlevelled). WGS84, Helmert System. Units—micrometres/sec/sec** (gravity units)
TieLvAdjTie Line Levelling Adjustment. Units—micrometres/sec/sec (gravity units)
TieLvFA???Tie Line Levelled Relative Free Air Anomaly. WGS84, Helmert System. Units—micrometres/sec/sec (gravity units)
NoiseAdjNoise Adjustment. Units—micrometres/sec/sec (gravity units)
RelFA???Final Relative Free Air Anomaly. WGS84, Helmert System. Units—micrometres/sec/sec (gravity units)
DCHelmertDC Adjustment to Absolute Gravity. WGS84, Helmert System. Units—micrometres/sec/sec (gravity units)
AbsFA???HelEllipsAbsolute Free Air Anomaly. WGS84, Helmert System. Units—micrometres/sec/sec (gravity units)
TerrainTerrain height (metres) (AHD71)
NValueN-Value AusGeoid98 (metres)
AHD71HtHeight above Geoid (metres) (AHD71)
ObsFiltObserved Gravity—Filtered height term (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
ObsObserved Gravity—unfiltered height term (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
FA???GRS67AHDFiltFinal Absolute Free Air Anomaly (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
NormBCorrFiltNormalised Bouguer Correction, filtered to match gravity (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
BullardCorrFiltBullard (Earth Curvature) Correction, filtered to match gravity (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
B???Corr254Bouguer Correction, dens=2.54 (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
B???Corr267Bouguer Correction, dens=2.67 (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
NormTerr???CorrFiltNormalised Terrain Correction, filtered to match gravity (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
Terr???Corr254Terrain Correction, dens=2.54 (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
Terr???Corr267Terrain Correction, dens=2.67 (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
BA???sim254Final Absolute Simple Bouguer Anomaly (dens=2.54) (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
BA???sim267Final Absolute Simple Bouguer Anomaly (dens=2.67) (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
BA???com254Final Absolute Complete Bouguer Anomaly (dens=2.54) (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
BA???com267Final Absolute Complete Bouguer Anomaly (dens=2.67) (IGSN71, AHD71). Units—micrometres/sec/sec (gravity units)
NotationExplanation
???Filter Length 060, 080, 107 seconds
**1 micrometre/sec/sec = 0.1 mGal

Go up to Step 3 3.4 Reports

For each report that you want to download, check the Download this report check box.

To prevent unneccessary downloading, make sure that you only check Download this report for the reports that you require.

Report list item
Report list item

Go to top Step 4—Submit Request

After you have selected the datasets or reports for download, GADDS displays the data licences and privacy policy. Read them and then acknowledge that you have read them and that you agree to their terms and conditions.

To accept the licence terms and conditions, check the I have read, and agree to ... check box.

Licence agreement
Licence agreement

Complete the Development, Proposed Distribution of Data, Application check boxes and text. All fields marked with an * are compulsory.

Data usage statement form
Data usage statement form

If you are an existing user, enter your e-mail address and choose Submit

If you are a new user, choose Register and complete the registration form.

We deliver the data to the e-mail address that you supply.

Client log in or registration
Client log in or registration

Note: We supply a maximum of 200 Mb per request. Larger files may take too long download. A warning appears if the requested data is more than 200 Mb. If you require a download larger than 200 megabytes please contact us—See our Feedback page.

We display a message to inform you that we have accepted your request.

Message that GADDS has accepted your request
Message that GADDS has accepted your request

Go to top Step 5—Download data

When GADDS has extracted and zipped the data, you receive an e-mail with a link to the prepared data.

E-mail message announcing that your data is available for download
E-mail message announcing that your data is available for download

Follow the link in the e-mail message to the prepared data and select the Save this file to disk option. Choose OK.

File download options dialog box class=
File download options dialog box

The Save As window opens. Specify a name for the zip file a name that represents the data it contains. Choose Save.

Selecting the Open this file from its current location option button will open the zip file.

Save As dialog box
Save As dialog box

The download commences. When the download is complete you can open the zip file.

Message that download is complete
Message that download is complete

Choose Open to display the contents of the zip file.

Example of downloaded zip file contents
Example of downloaded zip file contents

Go up to Step 5 5.1 Zip file contents

For all datasets the zip file contains copyright information in the file Copyright_Disclaimer.txt

For grid datasets:

For vector datasets (ASCII format):

Go to top