Accessing the Trap.NZ map feeds with ArcGIS

Accessing layers

You can add WFS Servers via Connections, Server, New WFS Server:

Enter the WFS URL in the format as described 
https://io.trap.nz/geo/trapnz-projects/wfs/apikey/project_id

The WFS server is set to return a maximum of 10k features per request.  Therefore you must set a page size value smaller than that.  We suggest 5k to begin with.  Add a custom request parameter of PAGESIZE, with a value of 5000

Leave the Authentication options blank (we are using the API key to control access)

Your would now see the available layers:

Working with the layers

Right-click, or drag the layer to map to see the features.   Note that, by default, ArcGIS only shows a maximum of 3000 features in the WFS layer.  To change this, right-click the layers, select properties and then set the maximum features to something well above what you expect should be returned.

Filtering records

You can add a CQL filter to a WFS connection to filter features from the WSF server.  This can be achieved by adding this parameter to the Custom request parameters - which can greatly reduce the amount of data retrieved (speeding up the transfer and improving performance).  

For example - if you are only interested in this year’s records you could add a CQL filter to as a Custom request parameter 

add cql_filter as Parameter and record_date %3E '2021-01-01' as Value.

Note - symbols such as ‘<’ and ‘>’ need to be URL encoded, hence the %3E in place of >