By Lee Belbin, Geospatial Team Leader
![Geospatial Filtering Geospatial Filtering](http://www.ala.org.au/wp-content/uploads/2010/09/geospatial-Filtering-300x249.gif)
Team member Adam Collins has developed two key applications for the Spatial Analysis Toolkit. The ALA’s emphasis is on species, but there is high value in integrating a range of environmental data. The first application samples the values of selected environmental data surfaces at the geographic locations of species observations. Sampling produces a spreadsheet file containing of locations (rows) by environmental values (columns).
Adam is also developing a filtering application: The reverse of sampling. The user selects environmental layers of interest and lower/upper bound values for each layer. Filtering then identifies what species lie within the defined environmental envelope. The figure shows the areas in Australia with a single layer – a mean annual temperature between 17.4 and 21.7 degrees Celsius.
In the next newsletter, we will discuss the first modelling application in the Toolkit: MaxEnt.