Merging Tabular Data with Spatial Data 3. Planning a Tabular Database 2. Editing Raster Data 3. Student can explain the differences between mathematical application of a scalar, a function, and a data layer. If software will be used, students can describe the software steps used to conduct Map Algebra using a scalar, a data layer and a function.
Student can give an example of each of the three types of operation.
Student understands the special case when two data layers are multiplied and the second contains only zeroes and ones. Topics - Map Algebra is used to transform or derive new data values from one or more existing data sets. In a vector system, in which attributes are stored in a database, Map Algebra using a scalar or a function involves transformation of the attribute values in the database. These are commonly written to a new field in the database. In a vector system, Map Algebra in which a data layer is combined with another data layer can produce a new data layer in which derived features may have different sizes and or shapes than in either input layer.