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titleGidday!

Welcome to the home page for the NIWA QGIS User Group. This is a publicly readable web page hosted by NIWA to support users of QGIS, particularly within NIWA, but any QGIS user is welcome!

Why are we here? Based on the understanding that the benefits from any Open Data initiative revolve around data mash-ups and re-use, providing access to a tool allowing people (including NIWA staff) to use all this free environmental data is an important part of any such initiative. QGIS is a core part of NIWA's information delivery strategy - for NIWA staff as well many of our other clients.

Much like the development of easily used and affordable word processing & spreadsheet software for personal computers enabled pretty much anyone to carry out what used to be specialised tasks, freely available desktop mapping and GIS software are enabling their democratisation and widespread general use. Note that we do not envisage QGIS as necessarily meeting all the needs of all GIS users, but NIWA and many other agencies in New Zealand and globally, are adopting tools like QGIS to enable more widespread use of institutional GIS resources, without the traditional expense associated with commercial GIS software.

So, here we are!


Time for next meeting:


When:          mid-late May - TBDearly June

Topic:           Accessing species distribution and other data from the research trawl database

Abstract:      NIWA manages several research databases for MPI Fisheries, which QGIS can be used to access. This demonstration will show how QGIS can be used to access & display research trawl survey data, eg:

  • one (or more) species from all trips
  • selected species from a particular trip
  • symbols sized by catch size
  • trawls with zero catch of a species
  • survey strata boundaries

These data can be overlaid with topo maps or marine charts, freely downloadable from LINZ. The demonstration will also show how you can use QGIS to invoke a request for a catch report by clicking on a station.

Anyone familiar with the trawl data, stratified surveys or pretty much any species observation/distribution data should find this useful and relatively easy.

An additional feature is the use of the QGIS Action tool (originally developed by Gavin Macaulay of NIWA) to retrieve catch data from the database by clicking on a station on the map.

 

 

The demonstration is based around this pdf document - a How-To guide to access research trawl data.

 


Click to view for a more detailed view of Landcare Research's freely available NZ basemap! (internet mapping with QGIS)

Please feel free to add comments & suggestions.

Questions can go here, but the mailing list is preferable.

If anyone wants to help manage these wiki pages, please let me know!!!


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