Assignments Australia Map

Map Basics

Markers will be displayed on the map in the location of ACMA Sites. Site Markers have different styling applied depending on whether
  • The marker is representing a cluster of sites
  • The site has at least one assignment
  • The site has no assignments
Refer to the Legend section as to this styling. Click or tap on a site marker to reveal further details in a popup. If the site has fewer than 500 assignments, summary information about these assignments will be retrieved and displayed in an accordion list. This allows further drill down of Assignment details.

Omni search input

This omni text input on the map allows the searching of a -Lat,Long pair, an ACMA Site, or an Australian street Address. Once a valid location has been established/selected, the map will be zoomed to this location. The search precedence is as follows;
  1. A valid -Lat,Long pair
  2. A match on Site ID
  3. A text match on Site Name
  4. A text match on a Street Address
  5. A fuzzy text match on a Street Address (eg, incorrect spellings)
An autocomplete of matching results may be shown as you enter a search term. Sites and Addresses can be distinguished by the icon prefixed in the suggested results.

What is a valid Lat,Long pair

A simplistic parser enables the entering of a latitude and longitude in this omni text input. Latitudes and Longitudes must be decimal numeric only and within valid GDA94 geodesic ranges. Note that latitudes in the southern hemisphere are negative. The following syntax is supported;
  1. -Lat,Long (example; -35.2,150.1) *
  2. "latitude" -Lat "longitude" Long (example; latitude -35.2 longitude 150.1)
  3. "longitude" Long "latitude" Lat (example; longitude 150.1 latitude -35.2)
* - This option is the preferred Lat,Long syntax - other options here are primarily provided to be of possible assistance when using Speech Recognition.

Speech Recognition

This input field has a Speech Recognition option available if that is supported on your device and browser. To use the speech recognition feature, leave this input field blank (empty) and either press ENTER or the button. A simple question will be announced and then once the input field background changes to "Speak Now ..." you can search by voice. Speech recognition requires a speaker and microphone to be enabled on your device for your browser.

Find Me - Geolocation

This button allows the map to be zoomed to, and then track, your physical location. To use this option, Geolocation permission will need to be granted to this page when you press this button. Further, this option will only zoom to your location if your positional accuracy can be determined to be less than 500 meters. As such, this option is best suited to GPS enabled devices. Once your location has initially been determined, the map will be zoomed to that location and then your position tracked. A draggable marker will be placed on the map indicating your position. Please note that when your position is being tracked, only the marker position on the map will be updated - that is the map itself won't automatically follow (pan to) your updated position. Geolocation tracking will stop if your position marker is either removed or dragged on the map.

If your device supports a compass, a green direction arrow may be displayed along with your position marker. This green arrow indicates the orientation you are currently holding your device (ie, where it is pointing to).

If your position is being tracked, you are moving, and your GPS heading can be determined, then a red triangle may be displayed inside your position marker. This red triangle indicates the direction that you are heading.

Draggable Marker

This button allows you to place a draggable marker on the map. Draggable markers may be useful to determine the nearest address, elevation, elevation profile, or distance and bearing to the most recent site you have clicked/tapped.

KML Feed

This button allows you to open a KML Feed. If you have specified any filter criteria or selected to draw point to point links, then these will also be used in the KML Feed. A program capable of viewing a KML Feed will be required on your device. A KML Feed will re-query the ACMA servers based on your specified map location and search criteria once opened in your KML viewing program. KML Feeds will be useable for any search conditions, however, if the Instant Open options may be useful for small result sets - see below.

Filter and Settings

This button allows you to change various aspects of the map (and read this help section). Under the General accordion, you can choose whether Point to Point links will be displayed in the map. Please note that displaying Point to Point links may result is poor map response times. Also under this option you can turn off the display of sites and/or zoom to Australia.

Under the 3 Filter accordions you can filter the display of sites on the map based on criteria. The filter criteria can include, filtering by site attributes, filter by assignment attributes (eg, client, licence, linked BSL, or technical details) and/or by a filtering by a spatial region on the map. All filter criteria must be satisfied in order for a site to be displayed on the map.

Filter Regions. Sites can be filtered by a spatial 2d region on the map. This can either be a simple sketched region, such as a box, polygon or circle, an arbitrary WKT, or a predefined spatial region. Sketched and WKT regions can be further edited on the map itself by dragging/adding/deleting region points. Searching and using predefined regions relies on a 3rd party provider ( To use a Predefined Region, firstly select which type of region and then type (enter), at least, 2 characters in the search input. Once suggested results are displayed, select one to add to the map.

Due to technical limitations, filter regions may be spatially simplified under certain circumstances. Regions will be simplified, and an audio warning announced, when

  1. Region WKT exceeds 30,000 bytes (~30Kb) when added to the map
  2. Region WKT exceeds 3,000 bytes (~3Kb) when they are used in conjuction with opening a KML Feed

The map background base layer (tile provider URL) can be changed under the Set Base Layer accordion. Note that base layers should use the Web Mercator (EPSG:3857) projection. There are some sample tile feeds available in this section.

Viewsheds can be generated on the map for transmitters having a non-zero antenna height. Click/Tap on a site marker and open the Frequency accordion on the particular transmitter assignment of interest. A viewshed for that assignment can then be generated on the map by selecting a site elevation, colour and distance (radius) - then press "Go".

Viewsheds (and elevation profiles) give an approximate line of sight estimate from a given assignment antenna. To generate viewsheds, either 3 second or 9 second DEM elevation data will be used depending on your chosen radius - however, buildings or foliage are not taken into consideration. If you check the Fresnel zone checkbox then the clearance of this zone will be checked (Fresnel zone calculations may result in poor response times however). The earth curvature is taken into consideration (adjusted to the refractivity factor). However, no other RF characteristics are taken into consideration. Should the assignment have a non-zero azimuth and the antenna a non-zero beamwidth, then a cyan segment outline to that effect will be overlayed on the viewshed. Viewsheds up to a radius of 30km can be generated.

    Instant Open

These buttons will be displayed under certain circumstances and allow an "Instant Open" of loaded sites either as CSV or KML . "Instant Open" is different to the "KML Feed" in that the "Instant Open" only considers the currently loaded sites in your browser and current map view (already downloaded site data) as opposed to opening a new KML Feed (which will re-query the ACMA server based on your KML viewing program, viewport, and filter parameters). In order to "Instant Open" Sites, and Links, as a KML, or CSV file, there are some restrictions applied;

  1. Only the Sites visible, and loaded, on your map will be be able to be opened.
  2. There must be no clustered sites shown on your map (clustering has some thresholds applied - as described in the next point). If clustered sites are displayed, you can try to either zoom in further or specify some filter criteria.
  3. There are some maximum limits (thresholds) applied to the number of sites that can be Instant Opened.
    1. Typically no more than 2000 sites for desktop (non-touch) devices, or
    2. no more than 250 sites for mobile/touch devices
If your particular search, viewport and filter parameters, is not restrictive enough to meet the above restrictions, please use the "KML Feed" option instead of the "Instant Open" option. Or, alternatively, consider downloading the daily RRL download or consider using the ACMA Offline RRL.

These "Instant Open" options may not work on some mobile devices.


ACMA Site Marker (having at least one assignment). Click/tap for details.
ACMA Site Marker (with no assignments)
A cluster of 35 sites are in this area (zoom in to reveal)
Linked Assignments (Point to Point Links). Click/tap for details.
Filter Region.
BSL Licensing Area.
Point of Interest or Geolocation Marker. Click/tap for additional functions.
May appear in conjunction to Geolocation Marker and indicates the direction of your current heading if you are moving (if known).
May appear in conjunction to a Geolocation Marker and indicates the direction of your device orientation (the direction your device is facing) (if known).

Use your concept map or plan

Write your assignment using your map or plan to guide you.  As you write, you may well get new ideas or think about ideas in slightly different ways.  This is fine, but check back to your map or plan to evaluate whether that idea fits well into the plan or the paragraph that you are writing at the time. Consider:  In which paragraph does it best fit?  How does it link to the ideas you have already discussed?

Paragraph planning

For every paragraph, think about the main idea that you want to communicate in that paragraph and write a clear topic sentence which tells the reader what you are going to talk about. A main idea is more than a piece of content that you found while you were researching, it is often a point that you want to make about the information that you are discussing.  Consider how you are going to discuss that idea (what is the paragraph plan). For example, are you: listing a number of ideas, comparing and contrasting the views of different authors, describing problems and solutions, or describing causes and effects?

Use linking words throughout the paragraph. For example:

  • List paragraphs should include words like: similarly, additionally, next, another example, as well, furthermore, another, firstly, secondly, thirdly, finally, and so on.
  • Cause and effect paragraphs should include words like: consequently, as a result, therefore, outcomes included, results indicated, and so on.
  • Compare and contrast paragraphs should include words like: on the other hand, by contrast, similarly, in a similar way, conversely, alternatively, and so on.
  • Problem solution paragraphs should include words like: outcomes included, identified problems included, other concerns were overcome by, and so on.

Some paragraphs can include two plans, for example a list of problems and solutions.  While this is fine, it is often clearer to include one plan per paragraph.  

Linking paragraphs:

Look at your plan or map and decide on the key concepts that link the different sections of your work.  Is there an idea that keeps recurring in different sections?  This could be a theme that you can use to link ideas between paragraphs.  Try using linking words (outlined above) to signal to your reader whether you are talking about similar ideas, whether you are comparing and contrasting, and so on.  The direction that your thinking is taking in the essay should be very clear to your reader.  Linking words will help you to make this direction obvious.

Different parts of the essay:

While different types of essays have different requirements for different parts of the essay, it is probably worth thinking about some general principles for writing introductions, body paragraphs and conclusions.  Always check the type of assignment that you are being asked to produce and consider what would be the most appropriate way to structure that type of writing. 

Remember that in most (not all) writing tasks, especially short tasks (1,000 to 2,000 words), you will not write headings such as introduction and conclusion.  Never use the heading ‘body’.

Writing an introduction:

Introductions need to provide general information about the topic. Typically they include:

  • Background, context or a general orientation to the topic so that the reader has a general understanding of the area you are discussing.
  • An outline of issues that will and will not be discussed in the essay (this does not have to be a detailed list of the ideas that you will discuss).  An outline should be a general overview of the areas that you will explore.
  • A thesis or main idea which is your response to the question.  

Here is an example of an introduction:

It is often a good idea to use some of the words from the question in the introduction to indicate that you are on track with the topic.  Do not simply recount the question word for word. 

Writing the body:

  • Each paragraph should make a point which should be linked to your outline and thesis statement.
  • The most important consideration in the body paragraphs is the argument that you want to develop in response to the topic. This argument is developed by making and linking points in and between paragraphs.

Try structuring paragraphs like this:

  • Topic sentence: open the paragraph by making a point 
  • Supporting sentences: support the point with references and research
  • Conclusive sentence: close the paragraph by linking back to the point you made to open the paragraph and linking this to your thesis statement.

Here is an example of a body paragraph from the essay about education and globalisation:

As you write the body, make sure that you have strong links between the main ideas in each of the paragraphs.

Writing the conclusion:

This is usually structured as follows:

  • Describe in general terms the most important points made or the most important linkage of ideas
  • Do not include new information, therefore it does not usually contain references
  • End with a comment, a resolution, or a suggestion for issues that may be addressed in future research on the topic.

Here is an example conclusion from the essay on education:

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