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This tool assists with the creation of a standalone table that can contain preset density values for all the unique classes in the ancillary dataset. For instance, if your ancillary dataset represents land cover, you may wish to preset the "Water" or "Glacier" classes to zero. After the table is created, it will need to be manually populated with preset density values, and classes that should not be preset should be removed from the table.
The output table will contain ancillary class values, the count of the number of pixels in that class, and a new column with floating-point type called PRESETDENS, which represents estimated people per pixel. It is most common for this function to be used to specify zero population for certain classes (it's often a safe assumption that water or snowfield areas have zero population). Setting such classes to zero helps refine density estimates in the intelligent dasymetric mapping. You may finish preparing this table in at least two ways:
You should remove rows from the table corresponding to those classes for which you do not wish to provide estimates (you would prefer their densities to be calculated via intelligent dasymetric mapping).
Expression | Explanation |
---|---|
<Ancillary_Raster> |
The ancillary raster dataset. |
<Ancillary_Preset_Table> |
The output standalone table with full path that will be created. |
Expression | Explanation |
---|---|
Ancillary Raster (Required) |
The ancillary raster dataset. |
Ancillary Preset Table (Required) |
The output standalone table with full path that will be created. |