Effective and ineffective GIS Mapping systems
Effective
1. Choropleth Maps
These maps contain areas that are shaded or patterned in proportion to the statistical variable being displayed on the map. Data are aggregated over predefined areal units, for example standardized data such as rates of growth, etc.
2. Isopleth Maps
These maps show smooth continuous information, as data are depicted using lines that connect points of equal numerical value. This is very good for mapping weather and pollution data.
Ineffective
1. Graduated symbol maps
These maps contain symbols varying in size to show their relative quantitative values; used with point/location data. This cannot be used for standardized data and sometimes can be too inaccurate with the symbols.
2. Cartogram Maps
In these maps, each mapped area's spatial geometry depicts an attribute other than area. The downside with this one is that the methods into making this map are complex and interpretation can be very difficult.
Hi Tishawn,
ReplyDeleteYou provided really great examples of some of the challenges associated with certain map types. However keep in mind that the quality of the map ultimately depends on the purpose of the map, the data used and the way it was designed. For instance you could have a good or a bad choropleth map depending on the previous listed factors, same goes for graduated symbol or any other type of map. Would you be able to search the internet and find/upload a photo of a good cholorpleth map and a bad choropleth map?