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  2. Choropleth map - Wikipedia

    en.wikipedia.org/wiki/Choropleth_map

    A choropleth map (from Ancient Greek χῶρος (khôros) 'area, region' and πλῆθος (plêthos) 'multitude') is a type of statistical thematic map that uses pseudocolor, meaning color corresponding with an aggregate summary of a geographic characteristic within spatial enumeration units, such as population density or per-capita income.

  3. Multivariate map - Wikipedia

    en.wikipedia.org/wiki/Multivariate_map

    A bivariate map or multivariate map is a type of thematic map that displays two or more variables on a single map by combining different sets of symbols. [1] Each of the variables is represented using a standard thematic map technique, such as choropleth, cartogram, or proportional symbols. They may be the same type or different types, and they ...

  4. Wikipedia : WikiProject Maps/Conventions/Gradient maps

    en.wikipedia.org/wiki/Wikipedia:WikiProject_Maps/...

    Stake. Gradient maps are both at the center and at the basic level of map making on Wikipedia. A simple blank map and fill with color tool are needed. To continue to build a coherent Wikipedia display, this page suggests the most suitable SVG source files together with a blue-based color ramps from academic, screen friendly, print friendly, and color-blind friendly ColorBrewer2 by cartography ...

  5. Chorochromatic map - Wikipedia

    en.wikipedia.org/wiki/Chorochromatic_map

    Because most types of thematic maps are designed to portray quantitative data, one could assume that a nominal variable would dictate the creation of a chorochromatic map. [12] However, choropleth maps can be used to portray nominal data that is created by aggregating and summarizing a geographic variable within predetermined districts. The ...

  6. Color scheme - Wikipedia

    en.wikipedia.org/wiki/Color_scheme

    Quantitative schemes are fundamental to Thematic maps, charts, data science, spreadsheets, and other tools which use graphical means to visualize quantitative data. They are common in heat maps, choropleths and other forms of visualization. These color schemes can be categorized into different classes, depending on the nature of the underlying ...

  7. Template:Choropleth world map - Wikipedia

    en.wikipedia.org/wiki/Template:Choropleth_world_map

    The dataset should be stored at Wikimedia commons, in the Data namespace, as a tabular data (.tab) file. Currently, the file format should be JSON, representing a three column table, where the first column is the three-letter ISO country code, the second is the year and the third is the value.

  8. Jenks natural breaks optimization - Wikipedia

    en.wikipedia.org/wiki/Jenks_natural_breaks...

    Choropleth map showing estimated percent of the population below 150% poverty in the Contiguous United States by county, 2020 that uses the Jenks natural breaks classification. Jenks’ goal in developing this method was to create a map that was absolutely accurate, in terms of the representation of data's spatial attributes.

  9. Modifiable areal unit problem - Wikipedia

    en.wikipedia.org/wiki/Modifiable_areal_unit_problem

    A census choropleth map calculating population density using state boundaries will yield radically different results than a map that calculates density based on county boundaries. Furthermore, census district boundaries are also subject to change over time, [ 4 ] meaning the MAUP must be considered when comparing past data to current data.