Star Plots: Allows the comparison of multiple data units for each group. The variable frequencies for each group are plotted as radii from the center.
Thursday, July 17, 2008
Thursday, July 10, 2008
Accumulative line Graph or Lorenz Curve: A graph for showing the concentration of economic quantities such as wealth and income. It is formed by plotting the cumulative distribution of the amount of the variable concerned against the cumulative frequency distribution of the individuals possessing the amount.
Saturday, July 5, 2008
Friday, July 4, 2008
Classed Choropleth Map: The data is grouped within areas such as states and counties, shaded according to value. Areal units are combined into a smaller number of units classified as intervals. There are typically four to seven units of classification. Units may be classified according to equal steps, natural breaks, minimum variance, or quantile.
Range Graded Proportional Circle Map: Range graded proportional circle map: a proportional circle map that depicts the data in relation to ranges of data. The information is classified as equal quantiles, breaks, natural breaks, and minimum variance. . Range-graded scaling: The data are divided into groups, using classification procedures common to choropleth mapping. The design goal is for symbol size discrimination, rather than magnitude estimation. The cartographer chooses symbol sizes for adjacent classes so that the map reader can easily distinguish between circle sizes, and therefore, categories. Only a set number of circle sizes are used.
Monday, June 30, 2008
Digital Orthophoto Quarter Quadrangle (DOQQ): A digital raster (pixel based ) image of an aerial photograph in which displacements caused by the camera and terrain have been removed through orthorectification. It combines the image qualities of a photograph with the geometric qualities of a map. A DOQ is either B&W or color infrared (CIR) and represents one USGS 7.5 minute quadrangle. A DOQQ is one quarter of the quadrangle, so the DOQ name is followed by SE, NE, SW, or NW. DOQQ scale is 1:12,000 or 1" = 1,000' .
Friday, June 27, 2008
Tuesday, June 24, 2008
Saturday, June 21, 2008
Wednesday, June 18, 2008
Cartographic Animation: The use of GIS and computer databases to create animated, changeable, interactive maps. This can include temporal animations, generalization animations (e.g. change of births), geographic trend animations (e.g. census data), and classification animations. This one shows the dates of African independence.
Statistical Map: A map in which the variation in the quantity of a factor such as rainfall, population, or crops in an area is indicated. A dot map is one type. In a statistical map each unit is represented by a shading or color that represents the value or range of values for that variable. The statistics shown on the map can express rates, ratios, percentages or other statistical measures. Values in the distribution must be mutually exclusive and exhaustive. This one is for a mining operation.
Wednesday, June 11, 2008
Tuesday, June 10, 2008
Propaganda map: In this case it was used to illustrate the danger of nuclear missles in Cuba. Propaganda is a concerted set of messages aimed at influencing the behaviors or opinions of large numbers of people. It uses disinformation or the selective presentation of information to create a false and usually emotionally manipulative mental map.
Thursday, June 5, 2008
Subscribe to:
Posts (Atom)