Landscape

The landscape is represented as a 2-dimensional grid of equal-sized squares called sites.  An individual site is identified by its location - row and column - in the gird.

However, there is no need to use nested loops with coordinates of each site on the landscape if all of them need to be accessed; a simple foreach loop is used instead. Thus, the basic loop to work with sites is:

foreach (Site site in Model.Core.Landscape.AllSites)
{
    // do something with the current site (either active or inactive)
}

The basic loop to work with active sites on the landscape is:

foreach (ActiveSite site in Model.Core.Landscape)
{
    // do something with the current active site
}

Example from Base Wind extension:

int eventCount = 0;   // number of occured events
foreach (ActiveSite site in Model.Core.Landscape)
{
    // Try to initiate a wind event at current active site;
    // a new event won't initiate at the site if it is already
    // part of another event.
    Event windEvent = Event.Initiate(site, Timestep);
    if (windEvent != null)
    {
        // A new wind event started at the current active site,
        // and spread to neighboring sites.  Log details about
        // the event.
        LogEvent(Model.Core.CurrentTime, windEvent);
        eventCount++;
    }
}
// Report # of events to the User Interface and log file
UI.WriteLine("Wind events: {0}", eventCount);

For more information refer to Landis.Landscape Namespace in the LANDIS-II Help File for Developers