GEOG 286 Lecture Notes - Lecture 13: Decimal Degrees
Document Summary
Rasters: best for mapping continuous phenomena, uses a grid of cells, each cell is assigned a value. Raster resolution: the size of the smallest detail with a single value, measured by cell size dimensions. Cell resolutions units: in the units of raster" coordinate system, such as decimal degrees, meters, feet, etc. Raster data types: optimize storage and match mapped phomena. Can store using integer, floating point which is required for more decimal storage. Use them for analysis since they"re better for continuous data, certain data and analyses are better for raster. Cons: coordinate precision is generally lower, high precision has high storage costs, cannot store multiple attributes. Convert input rasters into anew output raster. Some types of functions: arithmetic, logical/relational, statistical. Local: when functions are applied to individual cells, involve one or more rasters.
