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The Spatial Statistics modeltype can be used to calculate the minimum, maximum, average, median, standard deviation of the whole map, for the whole map , a part of the map selected by zooming into a map or in subareas defined by an other map. Furthermore, it is possible to calculate the area of different classes of values, e.g. the habitat suitability between 0 - 0.8 and 0.8 and 1 (HABITATDOC:read more #Statistics using classes on the use of classes).
It is possible to calculate the statistics for:
- the #whole map or
- for different #subareas or
- for a selection of the map #selection of map by adding coordinates.
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Statistics on the whole map
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In case of only a subject map select 'whole map' in the top of the statistics working area. Depening . This is the default setting. Deepening on the type of the subject map (nominal which is equal to integers indicating classes; or scalar which are real values and not integer) the output is calculated according to table 1 or 2. The area is given in m2.
The following steps should be followed to define a spatial statistics using one map as input:
- add a model with right click at the scenario composite model you want to add the model to in the tree of the Project Explorer and select the Spatial Statistics model from the pull-down menu in the pop-up window. You can also drag to Spatial Statistics model from the Toolbox by dragging it from the toolbox and dropping it in the tree of the Project Explorer. Once you opened the Spatial Statistics window by double clicking in the Project Explorer. The window look like the figure below. The numbers correspond with the steps to implement a Spatial Statistics.
- Enter a name for the input variable.
- Enter the file path for the input grid, by typing or double click at the field and select a map by browsing or by selecting a map from previous models or scenarioscomposite models. You can also use results from previous models by linking the maps in the Project Explorer. Enter a description and units if you want.
- You may add classes which will be used to calculate the statistics for (see example below or HABITATDOC:text below ).
User interface for Spatial Statistics model. The numbers correspond with the steps to implement a Spatial Statistics.
The figures below presents present an example of statistics workings area for a statistics model with a nominal subject map, a real subject map and a real subject map with classes.
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The following steps should be followed to define a spatial statistics using one map as input:
- add a model with right click at the scenario composite model you want to add the model to in the tree of the Project Explorer and select the Spatial Statistics model from the pull-down menu in the pop-up window. You can also drag to Spatial Statistics model from the Toolbox by dragging it from the toolbox and dropping it in the tree of the Project Explorer.
- Select 'Area Map' instead of 'Whole map' as a Map type from the pulldown menu in the MapType properties window.
. You can only do this when you have selected your model in the project explorer. Once you opened the Spatial Statistics window by double clicking in the Project Explorer. The window look like the figure below. The numbers correspond with the steps to implement a Spatial Statistics. - Enter a name for the input variable.
- Enter the file path for the input grid, by typing or double click at the field and select a map by browsing or by selecting a map from previous models or composite models. You can also use results from previous models by linking the maps in the Project Explorer. Enter a description and units if you want.
- You may add classes which will be used to calculate the statistics for (see example below).
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Example of statistics working area for a statistics on a subject map with classes and an area map. The results are shown as well in the lowest part of the window.
