Classed choropleth maps are used to show various data for different states or counties. Then the information is classed into a smaller number of groups and poprtrayed into different intervals. A subjective process must be used in order to accurately group or classify the information shown. Most of the time a different color is used for each state or county shown, and very little information can be communicated through these maps. Usually there are four to seven intervals used when putting together a classed choropleth map.The classed choropleth map above is illustrating the SMR for U.S. cervical cancer mortality from years 2000-2004. When using or observing these maps the main pattern of interest and focus is always on classing and showing various data for different states and counties.
No comments:
Post a Comment