The Perth canyon Marine Park Bathymetry dataset was created by compiling GA's bathymetry data holding. The bathymetry consists of the following surveys:

<br>

<br>Counter,Survey_Name,Vessel,Multibeam_System,Institution

<br>1,GA-0157_Adedav,N/O_L'Atlante,'EM12 Dual',IFREMER

<br>2,GA-0208_Margau,RV_Marion,'Dufresne TSM5265',IPEV

<br>3,GA-0265_Bremer_Basin_SS03/2004,RV_Southern_Surveyor,'EM300',CSIRO

<br>4,GA-0293_Mentelle_Basin_SS08/2005,RV_Southern_Surveyor,'EM300',CSIRO

<br>5,GA-0296_WA_Bio1_SS07/2005,RV_Southern_Surveyor,'EM300',CSIRO

<br>6,GA-0334_Vlaming_SubBasin,MV_Southern_Supporter,'Reson Seabat 7101',Fugro

<br>7,GA-1166_WEST09MV,RV_Melville,'SeaBeam 2000',SIO

<br>8,GA-1175_SOJN05MV,RV_Melville,'SeaBeam 2000',SIO

<br>9,GA-1179_Perth_Canyon_KN145L4,RV_Knorr,'Seabeam 2112',WHOI

<br>10,GA-1274_WEST10MV,RV_Melville,'SeaBeam 2000',SIO

<br>11,GA-1431_SOJN04MV,RV_Melville,'SeaBeam 2000',SIO

<br>12,GA-2305_EW0114,RV_Maurice_Ewing,'Atlas hydrosweep DS',LDEO

<br>13,GA-2309_MR03K04Leg6,RV_Mirai,'Seabeam 2112',JAMSTEC

<br>14,GA-2352_Rottnest_island,HMAS_Cook,'SeaBeam 2100',AHO

<br>15,GA-2354_Em300_Trials,RV_Southern_Surveyor,'EM300',CSIRO

<br>16,GA-2367_EW0112,RV_Maurice_Ewing,'Atlas hydrosweep DS',LDEO

<br>17,GA-2383_Nat_Rocks_SS09/2005,RV_Southern_Surveyor,'EM300',CSIRO

<br>18,GA-2390_WABio_leg2_SS10/2005,RV_Southern_Surveyor,'EM300',CSIRO

<br>19,GA-2400_Recherche_SS04/2006,RV_Southern_Surveyor,'EM300',CSIRO

<br>20,GA-2406_GeraldtonEddy_SS05/2006,RV_Southern_Surveyor,'EM300',CSIRO

<br>21,GA-2433_HobFreoTransit_SST03-2007,RV_Southern_Surveyor,'EM300',CSIRO

<br>22,GA-2434_WAPelagic_SS04/2007,RV_Southern_Surveyor,'EM300',CSIRO

<br>23,GA-2468_TIP2000_MD119,RV_Marion,'Dufresne TSM5265',IPEV

<br>24,GA-2476_WA_MarginsLeg1-3,RV_Sonne,'EM120',IFMGEO

<br>25,GA-2493_DunedinAntarFreo_KNOX03RR,RV_Roger_Revelle,'EM120',SIO

<br>26,GA-4304_HobarttoBroome_SST01/2010,RV_Southern_Surveyor,'EM300',CSIRO

<br>27,GA-4313_NingalooAutumnDynamics_SS04/2010,RV_Southern_Surveyor,'EM300',CSIRO

<br>28,GA-4318_WARockLobster_SS05/2010,RV_Southern_Surveyor,'EM300',CSIRO

<br>29,GA-4324_GABTransit_SST02/2010,RV_Southern_Surveyor,'EM300',CSIRO

<br>30,GA-4325_WAShelfProcesses_SS06/2010,RV_Southern_Surveyor,'EM300',CSIRO

<br>31,GA-4368_nextWaveTransit_SS2011_t03,RV_Southern_Surveyor,'EM300',CSIRO

<br>32,GA-4369_PerthAbyssalPlain_SS2011_v06,RV_Southern_Surveyor,'EM300',CSIRO

<br>33,GA-4371_FreoHobartTransit_SS2011_t04,RV_Southern_Surveyor,'EM300',CSIRO

<br>34,GA-4393_HobartFreoTransit_SS2012_t05,RV_Southern_Surveyor,'EM300',CSIRO

<br>35,GA-4411_GAB_SS2013_t02,RV_Southern_Surveyor,'EM300',CSIRO

<br>36,GA-4421_MH370Search_Equator,MV_Fugro_Equator,'EM302',ATSB

<br>37,GA-4430_MH370Search_Supporter,MV_Fugro_Supporter,'EM122',ATSB

<br>38,GA-4441_perth_Canyon_FK150301,RV_Falkor,'EM302/EM710',UWA/Schmidt Ocean Inst.

<br>39,GA-4454_IN2014_E01,RV_Investigator,'EM710',CSIRO

<br>40,GA-4473_IN2016_v01,RV_Investigator,'EM710/EM122',CSIRO

<br>41,GA-4480_FreoAntarcticaFreo_CLIVAR108S_RR1603,RV_Roger_Revelle,'EM122',SIO

<br>42,GA-4481_GlobalrepeatHydrology_RR1604,RV_Roger_Revelle,'EM122',SIO

<br>43,GA-4490_GABbenthic_IN2015_C02,RV_Investigator,'EM710',CSIRO

<br>44,GA-4807_DarwinFreo_SO257,RV_Sonne,'EM122',IFMGEO

<br>45,GA-4811_TrawledCommunities_IN2017_T02,RV_Investigator,'EM122',CSIRO

<br>46,GA-4812_FremantleHobart_IN2017_T02,RV_Investigator,'EM710',CSIRO

<br>47,GA-5007_TwoRocksToCapeNaturaliste,Cesna,'LIDAR/XYZ',WADOT

<br>

<br>The dataset was processed in the Geoscience Australia by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2.

<br>Metadata:

<br>Grid resolution: 40 m

<br>Number of grids: 1

<br>Total surface coverage: 13,669.86 km2

<br>Vertical Datum: MSL

<br>Horizontal Datum: WGS84 UTM-50S

<br>Use Limitation: This dataset is not to be used for navigational purposes.

<br>This dataset is published with the permission of the CEO, Geoscience Australia

<br>

<br>Processing:

<br>1. First a vessel configuration file was created where the co-ordinates of the motion sensor and DGPS antenna and patch test offsets were recorded.

<br>2. A new project was then created, and the vessel configuration file was attached to the project file.

<br>3. The raw swath sonar data, in raw.all format, for each line was then imported into the project and the vessel information assigned to the data.

<br>4. The motion sensor, DGPS and heading data were then cleaned using a filter that averaged adjacent data to remove artifacts.

<br>5. Different sound velocity profiles data for each block were attached to the corresponding raw swath sonar data files to correct the depths for changes in the speed of sound through the water column.

<br>6. Then a new blank field area was defined that specified the geographic area of study and the co-ordinate system used. The co-ordinates for the study areas were WGS84 UTM-50S.

<br>7. The data was cleaned by applying several filters that removed any remaining spikes in the bathymetry data using user defined threshold values. A visual inspection of the data for each line was then undertaken where artifacts and noisy data not removed by the filtering process were removed manually using Swath and subset editors’ modules of the Caris HIPS/SIPS software.

<br>8. All the data for each bathymetric, motion sensor, DGPS, heading, tide and sound velocity profile data were merged to produce the final processed data file. A weighted grid of the processed data was then created for each Block. In GA the tide was applied to the grid to correct for tidal variations and velocity corrections were performed to correct for different artifacts and mismatches.

<br>9. The processed data was finally exported as grids soundings or false coloured images for presentation and reporting and as final processed data in in ASCII XYZ as well as GeoTIFF formats at the optimum resolution the data can provide.

<br>10.Using CARIS Base editor 4.1 the grids were exported as ESRI ASCII grid, then imported into ARC catalogue/info to create a raster file for the entire survey.

<br>