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How are discrete and continuous data represented in ArcGIS?
Values that are assigned to the cells of a surface can be represented as either discrete or continuous data. Features and surfaces in ArcGIS can be represented as either discrete or continuous data. Discrete data, also known as categorical or discontinuous data, mainly represents objects in both the feature and raster data storage systems.
Which is an example of continuous surface data?
One type of continuous surface data is derived from those characteristics that define a surface where each location is measured from a fixed registration point. These include elevation (the fixed point being sea level) and aspect (the fixed point being direction: north, east, south, and west).
Which is an example of a feature on the continuum?
Examples of features that fall along the continuum are soil types, edges of forests, boundaries of wetlands, and geographic markets influenced by a television advertising campaign. The determining factor for where a feature falls on the continuous-to-discrete spectrum is the ease in defining the feature’s boundaries.
How are discrete data represented on a map?
This data can be represented as a continuous surface, generally without sharp or abrupt changes. Discrete features are discontinuous and have definite feature boundaries. For example, a road has a width and length and is represented on a map as a line.
How are features drawn in ArcGIS table of contents?
In the default sequence, features are first drawn according to the order of layers in the table of contents (from bottom to top). Then, within each layer, features are drawn based on the table order—that is, the order that features are stored in the feature class table (or in the order that they are returned from the geodatabase).
When do you use symbol level drawing in ArcGIS?
When you use symbol level drawing, you override the ArcMap default drawing sequence. In the default sequence, features are first drawn according to the order of layers in the table of contents (from bottom to top).