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8-Data Display and Cartography


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Unformatted text preview: graduated color uses a quantitative color scheme to show variations in spatial data – choropleth map symbolizes derived data such as average income or population density based on administrative boundaries Type of Map Type of Map Quantitative – dasymetric map uses statistics and additional information to delineate areas of homogeneous values, rather than administrative boundaries. – graduated symbol map uses different sized symbols to represent different magnitudes. Issues of range and discernable differences – chart map uses either pie or bar charts to compare multiple sets of quantitive data. Size can be part of information – flow map displays different quantities of flow data by varying the width of the line symbols Typography Typography Type Variations – typeface (design character) – serif and sans serif – weight (bold, regular or light) – width (condensed or extended; roman or italic; upper or lower­case) – points (size) – font (complete set of all variants for a given typeface and size) Typography Typography Selection of Type Variations – size: large, bold, caps or thin, lower case, normal – legibility and harmony – conventions: san serif in body, serif in title and legend; italic for water features; upper and lower case for administrative units Typography Typography Placement of Text Point feature – name to upper right Line feature – in block and parallel to course of line feature Area feature – name in feature, size dependent on extent Other – – align with boundaries or lines of latitude names entirely on land or entirely on water Typography Typography Labeling algorithms – – – difficult scales conventions – – – – – manual or automatic predefined relative to symbol find best placement leaders, etc spline along rivers Methods Map Design Map Design Map design is a visual plan to achieve a goal Graphic arts, visual perceptions Layout – arrangment and composition of map elements. – focus, order, balance – templates – ArcView variables Visual Hierarchy Visual Hierarchy Developing a visual plan to introduce the 3­D effect or depth. Figure­ground relationship Interposition Sub­divisional organization into primary and secondary symbols Soft Copy vs Hard Copy Maps Soft Copy vs Hard Copy Maps CRT vs paper Red/Green/Blue (RGB) – screen – emitted Hue/Saturation/Value (HSV) for custom colors Cyan/Magenta/Yellow/Black (CYMK) – paper – reflective...
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