gis mapping data Flashcards
nominal data
values that name or identify an object, such as a street name
categorical data
data that places objects in unranked groups
numeric data
values stored as numbers rather than as names or categories
unique values map
a map type in which each attribute is assigned its own symbol
ordinal data
data value that indicates rank or ordering system
ratio data
data having regular scale of measurement and a natural zero point, such as percipitation or population
interval data
values that follow a normal scale but have no naturalk zero point, such as degrees or celsius
graduated symbol map
A map with symbols that change in size according to the value of the attribute they represent. For example, denser populations might be represented by larger dots, or larger rivers by thicker lines
proportional symbol map
a map that displays attribute values with marker or line symbols that are proportional in size relaltive to the value of the feature
graduated color map
map that divides numeric datafrom polygon feature class into classes based on value and displays the classes with different colors
choropleth map
maps in which each feature , such as a state, is clored according to values in a data field
normalized data
to divide the values of an attribute field by the total of the field or by the values in another field
dot density map
a map representing attribute values bay a proportional number of randomly placed dots
chart map
map showing several different attributes in shart form, with one chart for each feature
thematic rasters
a raster that contains categorical or nominal data values, such as land use codes or soil types
discrete
data that take on a relatively small number of distinct values
continuous
data that take on a variety of different values and that change rapidly across a data set , such as elevation
