Nearmap WMS integration allows users of off-the-shelf GIS and CAD applications to load high-resolution imagery on demand.
Once authenticated, your software package will have a way for you to specify:
- The Nearmap layer you want to view
- The coordinate reference system you want to use to view the layer
Nearmap will provide the best projection for the WMS imagery.
- Log in to Nearmap at http://admin.nearmap.com/welcome.
- Select My Profile.
- Go to the API Access tab, and select the Services tab:
- Make sure you have an API Application, as well as an API Key.
The Simple WMS provides a URL that has the latest imagery for each region. The layer is shown only if you have access to that region (e.g. US, Australia, New Zealand).
Obtaining a Simple WMS URL
- Access the WMS 2.0 services -
- In the Simple Service, choose an application from the drop-down list.
- Copy the URL:
Simple WMS URL Structure
The Simple WMS URL looks like this:
Simple WMS Layers
The Simple WMS displays the following layers:
- Nearmap WMS - the combination of all the latest imagery of all the regions to which the user has access, overlaid on a satellite basemap
- Nearmap - the combination of all the latest imagery of all the regions to which the user has access
- Country Latest - the latest imagery for that country, without the satellite background
- Satellite - just the satellite imagery (NASA Blue Marble circa 2004)
The Custom WMS provides a URL that has the imagery for the areas you define.
Obtaining a Custom WMS URL
- Access the WMS 2.0 services -
- Either choose an existing custom service and jump to step 7 or create a new one. To create a custom service click the + above Add Custom Service:
- Name the service (choose a meaningful name), then click Add Area:
- Use the search box to search for your location, then draw the area you wish to add:
- Name the area (choose a meaningful name), then choose whether to add start and end dates. If you do s
- You can add more areas to the WMS service if you want to. When you are finished close the window.
- In the service you just created, choose an application from the drop-down list.
- Copy the URL:
We support the most popular local datums for all of our imagery. Depending on which coordinate system your GIS application is configured with, you can request imagery in the following coordinate systems:
- Australia - GDA94 and GDA2020
- USA - NAD83
- Canada - NAD83CSRS
- New Zealand - NZGD2000
When requesting imagery using WGS84 coordinate systems, namely EPSG:4326 (WGS 84) and EPSG:3857 (Web Mercator, Spherical Mercator, Pseudo-Mercator), our WMS service will automatically return imagery that has been converted to a local datum as per the table below.
|SRS||Australia||Canada||New Zealand||United States|
For Australian Customers – assumed datum
Several web applications assume GDA94 where the datum is not specified. (You can see from the table above that in Australia, Nearmap WMS 2.0 defaults to GDA2020.)
We provide a way to force the returned imagery to GDA94 with a custom request parameter DATUM. The behaviour of this parameter depends on the projection the imagery is requested in (SRS Parameter), as shown in the table below.
|Projection||DATUM=GDA94||DATUM is omitted (default behaviour)|
|EPSG:4326 (aka WGS84)||GDA94||GDA2020|
EPSG:3857 (aka Web Mercator)
|Any MGA94 projection||GDA94||GDA94|
|Any MGA2020 projection||GDA2020||GDA2020|
What is the advantage of this?
If your application relies on assumed GDA94, the alignment and accuracy can be improved by a significant margin, as you can see in the images below.
With GDA94 override
Suggestions on Image Format
Nearmap supports PNG and JPEG through the WMS service. Most WMS applications will request maps from a WMS server using PNG by default. When loading raster maps, such as Nearmap imagery, PNG has several advantages and several disadvantages. Please see below the recommendations for configuring your application.
When to Use PNG
PNG has a transparency channel, which means you can overlay Nearmap imagery on top of another basemap (for example a worldwide satellite layer or a roadmap). This works best when at small scale, for example when using a city or statewide extent. Note that PNG imagery is not compressed as much as JPEG and it will take longer to download.
When to Use JPEG
Use JPEG for working with imagery at large scale. At house or suburb level, the chances of being on the Nearmap boundary are much smaller, which means that you won't need the transparency capability of PNG. Note that if you do come across a boundary, the areas with no data are rendered as black.
Are there limits to the Custom WMS services? —
- Maximum number of WMS places - 50
- Maximum number of areas per place - 10
- Maximum area size - 5,000 km²
Is WMS 2.0 more accurate than what I am currently using? —
Australia - We have adjusted the datum of the imagery that is returned by default when you don’t specify a projection, i.e. rely on application defaults. WMS 2.0 will automatically adjust the imagery to GDA2020 coordinate system for Australia and NZGD2000 for New Zealand. This will reduce positional errors and projection mismatches ensuring your imagery lines up. WMS 2.0 will continue to support the GDA94 MGA zone projections in Australia.
What are the best practices for defining areas? —
Use simple boundaries around your areas of interest. The imagery is not requested until you interact with the application, so there is little difference in what imagery is returned when the custom service is used.
Should I use Simple or Custom WMS? —
The simple WMS should be used if you want the only latest imagery for your area (Australia/New Zealand/USA/Canada). You will not be able to perform geofencing or navigate time. Custom WMS will allow you to perform geofencing and to set up specified regions as the only imagery you can view. For those regions, you will be able to navigate the time and set boundaries for the dates.
How do I use GDA2020 projections? —
For Simple WMS all AU MGA zones are available in both GDA94 and GDA2020. For Custom WMS only the zones that intersect with the area of interest will be available as an option to request imagery in.
If we create many areas, does it have a performance impact? —
The performance impact is not so much dependent on the size of the area, but on the number of surveys you bring back. There is a limit on how big an individual area can be, currently set at about 5000 km2, and you can specify up to ten areas in the same service. If you bring in ten metropolitan areas around Australia, you could be loading thousands of surveys. That would slow down your initial loading into your GIS application.
How do I use State Plane projections? —
Only available in Custom WMS. Only the state plane projections that intersect with the area of interest will be available as an option to request imagery in.
Does interacting with the imagery in the area definition window count towards my usage? —
Yes. When you define an area, a small amount of imagery is loaded to provide context for where we have coverage. We envisage that there will be very little usage coming from this tool because:
- The map is very small, i.e. not full screen
- It is used infrequently to create services