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Subbasin Classification
Figure 1. NetMap’s Sort and Rank tool creates cumulative distributions (CDFs) for all individual subbasins within a set of polygons (shown here is HUC 6th field basins), thereby allowing a sorting and ranking of polygons by a number of statistical measures (Figure 2). (1) A user selects from a list of file names to store common sort and rank attributes (see Figure 4). (2) Or a user selects from a drop down list of NetMap attributes (Figure 3). (3) A custom layer (with a selected attribute) can be used. (4) Only a subset of attributes can be selected (e.g., limited to fish bearing network, road crossings or only selected watersheds). (6) An attribute of the distribution is selected for classifying (e.g., mean, and see Figure 2). (7) Previously saved sort and rank analyses (e.g., #1, Figure 4) can be selected and displayed. (8) The result is a classification of subbasin, in this case, by stream gradient.
Figure 2. Netmap’s Sort and Rank tool creates cumulative distributions for each pre-defined polygon (such as HUC 6th or 7th field basins). The user must select what aspect of the distribution to search for (i.e., #6 in Figure 1). Options include: 1) means, 2) any percentile of the distribution, 3) by percent less than a given attribute value, and 4) by a percentage that lies between given attribute values.
Figure 3. NetMap’s Sort and Rank tool contains a drop down list of all parameters (1) that can be used to classify subbasins (#2 in Figure 1).
Figure 4. NetMap’s Sort and Rank tool contains a drop down list of commonly used attributes for later retrieval (#1 in Figure 1).
