12

The graticule on the map suggests a conformal conic projection was used, because meridians and lines of latitude always meet at right angles, indicating conformality lines of latitude appear approximately circular and approximately equally spaced, characteristic of a conic projection. I therefore attempted to register a screenshot of the map to a base ...


9

QGIS depends on GDAL for a lot of its spatial data management. GDAL 2.2.0 should include GDA2020, as it includes updates for EPSG 8.9 and EPSG 9 (see https://trac.osgeo.org/gdal/query?group=status&milestone=2.2.0 ), for which the GDAL ticket says, "This release includes some critical changes for Australian users." EPSG 9 "What's New" page says, "New ...


7

The Natural Earth website is pretty good for freely available Geographic data, including Country boundaries.


7

You can get tabular (in HTML format) tide predictions from BOM. Maybe an HTML scraper like BeautifulSoup could parse it for you. An example of accessing the tabular tide predictions for Botany Bay:http://www.bom.gov.au/cgi-bin/oceanography/tides/tide_predications.cgi?location=nsw_60390&tide_hiddenField=New%20South%20Wales&years=2012&months=Feb&...


7

The URL you get (WMS request): http://services.land.vic.gov.au/catalogue/publicproxy/guest/dv_geoserver/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&WIDTH=512&HEIGHT=512&LAYERS=VMADMIN_AD_LOCALITY_AREA_POLYGON&STYLES=&FORMAT=image%2Fpng&SRS=EPSG%3A4283&BBOX=141%2C-39%2C150%2C-34 WMS request decomposed: - Service ...


6

For ground control, you're going to want something easily visible from your UAV. Temporary GCPs may be good enough for your purposes. Personally, I've used weighted plywood painted with an arrow in bright colors like yellow and red. The tip of the arrow gives you a precise location to both set your RTK unit over and visually identify when georeferencing ...


6

Adding to answer by Alex Leith, the “definition” of the GDA2020 datum has been added to the EPSG registry and EPSG “Datum” codes added. See http://www.ga.gov.au/scientific-topics/positioning-navigation/datum-modernisation for a summary of the codes. However, the information about how to transform between GDA94 and GDA2020 – by either a 7 parameter ...


6

There is some detailed information here, on the ICSM page on datum modernisation. Note importantly the two stage implementation: Stage–1 GDA2020 The GDA2020 datum will result from a readjustment of the entire national geodetic network to a reference epoch of 1 January 2020. This will correct regional decimetre–level biases remaining in GDA94, ...


6

PROJECTION LAMBERT UNITS METERS DATUM GDA94 SEVEN /* GDA94 SPHEROID GRS80 PARAMETERS -28 00 00 /* 1st standard parallel -36 00 00 /* 2nd standard parallel 135 00 00 /* Central meridian -32 00 00 /* Latitude of projections origin 1000000 /* False easting (meters) 2000000 /* False northin (meters) END should be EPSG:3107 - GDA94 / SA Lambert. This is its ...


5

There is an ANZLIC Compliant Metadata Editor for ArcGIS 10.2 available for download from Esri Australia as its Metadata Editing Tool. Versions for ArcGIS 10.0, 10.1, 10.2, 10.3 and 10.5 can be downloaded from the same link.


5

The QGIS user manual shows how to work with projections, see http://qgis.org/en/docs/user_manual/working_with_projections/working_with_projections.html. In this instance you need to follow the Custom Coordinate Reference System section. Of course for you to do this you need to know what the proj4 parameters are for the CRS you wish to create. Looking at ...


5

One of the ways to do this is to use the XY Event tool, which is used to create a point feature class from a table of x and y coordinates. You need to know what coordinate system the coordinates were recorded in as you will need this information to correctly locate the points. Coordinates in decimal degrees will need to be displayed with a Geographic ...


5

To add to the answer of Son of a Beach, the definitions of GDA2020 CRSs have been added to EPSG, and these have been brought into Proj4 and GDAL. These CRS definitions are good enough for many uses, but to do a precise transformation, you need to use a NTv2 transformation grid. While you can currently manually add the grid transformation file (GSB files), I ...


5

Between 1974 and 1977 there were intermittent problems with the data recording equipment on the satellite. With limited storage capacity on the tape, delays in transmission were observed. NASA was also starting to plan future satellites which would not carry onboard data recorders. Data from them would only be available through direct transmission. In the ...


4

Here is the data for Australia straight from their government's website: http://data.daff.gov.au/anrdl/metadata_files/pa_nsaasr9nnd_02211a04.xml Here is the data for New Zealand from their government's data portal: http://www.stats.govt.nz/browse_for_stats/people_and_communities/Geographic-areas/digital-boundary-files.aspx From here you can merge the two ...


4

The subcommittee that maintains the EPSG Geodetic Registry briefly had an Australian member who got some of the Australian data updated. Even so, these may not be the current coordinate reference systems. Christmas Island Currently the GeodCRS is GDA94 while the ProjCRS is GDA94 / CIG94. WKT (in the new format) is: PROJCRS["GDA94 / CIG94", BASEGEODCRS["...


4

If you're using a small area, you can use one of the MGA zones: The CRS for these is EPSG:283XX where XX is one of the numbers. It sounds like you want to cover all of Western Australia, though, so you probably want to use the Australian Albers, which is EPSG:3577.


4

Back in the early days of Landsat, the download and storage of data was not centralized. Local datacenters downlinked the data from the satellites and stored it. While most of the data from those local datacenters has since been centralized, not all data has been brought in - for various reasons. In some cases, the data may be irretrievably lost. In the case ...


3

You could try to use OpenStreetMap data. Global land and water polygons are freely available from http://openstreetmapdata.com/data/land-polygons, a service offered by Jochen Topf. In contrast to the above mentioned Natural Earth dataset OpenStreetMap data is much more detailed and therefore requires more disk space.


3

I'm writing an answer just because I'm going to run out of space in a comment! Sorry, there's going to be question coming up later. (also asked in a comment) NGS Inverse program gives 467.009 km. That's also what I get in the Esri projection engine. NGS and Esri projection engine are both using Vincenty. Esri has some extra code to handle near-antipodal ...


3

My suggestion is +proj=lcc +lat_1=-18 +lat_2=-36 +lat_0=-25 +lon_0=135 +ellps=aust_SA +units=m +no_defs giving me this picture:


3

The authoritative dataset for Victoria is VMAS, the Victorian Mapping and Address Service. Alternately you could try looking at the G-NAF, the Geographic National Address Framework from the PSMA (Public Service Mapping Agency). PSMA offer an online geocoding service that can take advantage of the VMAS and G-NAF address datasets (VMAS feeds into G-NAF but is ...


3

If you have to enter the buffer values as 0.0005 this means it's not projected in the correct projection. All you need to do is save your layer out with that projection.


3

You can download it in shapefile format from the geofabrik but I don't know about the quality and quantity of data regarding Australia. It seems you can specifically find Northern Territory boundaries here. You then run an intersection to get data on desired area with that wonderful tool named QGIS. Here is a video tuorial regarding intersection.


3

I know this is an old post, however I have processed the Census data along with Australia Post and the Gazeteer and have created individual KML files for each suburb boundary and put it on GitHub. You can get it here: https://github.com/aidanmorgan/aus_suburb_kml


3

County and Parish are no longer part of legal descriptions of land. The do still feature on survey plans and property contracts, but more so for historical reference purposes. Parish boundaries were drawn on Parish Maps which were fairly small scale and paid little (if any) attention to features outside the boundary. Here's a sample. You can find others ...


3

There are several projected coordinate systems that are valid for the whole Australia. I suggest that you use Australia Albers equal area because global projection often induce more distortions locally. For a global projection suitable for Australia, Hobo-Dyer (a cylindrical equal area projection) could be good too. As you can see on wikipedia, the Tissot ...


3

My advice would be use both and then compare the results. Depending on the accuracy you require, you might find that the results are comparable. That is, if you round up to the nearest metre squared, the number might be the same. GDA 1994 Australia Albers is great if you are dealing with areas that cover multiple zones (i.e. measuring a polygon area that ...


3

You can look up the administrative borders in OSM at https://osm.wno-edv-service.de/boundaries/. Just expand the tree view in the left panel. Brisbane seems to be still missing. You get from OpenStreetMap servers only that what other people have uploaded there. If noone has drawn a polygon with the extact borders, it will not be in the database. Keep in ...


3

In general there are 2 possible scenarios regarding coordinate system problems: The coordinate system assigned to the data is not the correct one. For example, the coordinates are in WGS84 but the assigned coordinate system is Pseudo Mercator. In this case the solution is to change the coordinate system. In FME this can be done with the ...


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