We're sorry but this page doesn't work properly without JavaScript enabled. Please enable it to continue.
Feedback

Creating Map Style & Visibility Rules from Statistics

Formale Metadaten

Titel
Creating Map Style & Visibility Rules from Statistics
Serientitel
Anzahl der Teile
188
Autor
Lizenz
CC-Namensnennung 3.0 Deutschland:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
Identifikatoren
Herausgeber
Erscheinungsjahr
Sprache
Produktionsjahr2014
ProduktionsortPortland, Oregon, United States of America

Inhaltliche Metadaten

Fachgebiet
Genre
Abstract
Map style, label, and visibility rules, especially those aimed at differentiating "important" classes of features from "minor" ones, can be derived from statistical functions performed on feature attributes. If the source data classification scheme is not already strong in prioritizing features how we want to view them, then style patterns may emerge from calculations over an assortment of counts, sums, averages, and other measurements. We will begin with a quick examination of popular open source web and desktop mapping engines -- do their configuration capabilities include formal constructs for deriving rules from statistics? Or must the developer arrive at "this looks right" through trial and error? We'll extend the discussion to specific data distribution patterns that can be exploited for styling. We're accustomed to setting line styles, symbol and font sizes, colors, and visibility at different scales. The bell curve resulting from a query may point us to where we make the scale breaks, or toward how much color or size contrast to employ in order to make the best presentation from the particular data we are displaying. Perhaps we can arrange our queries, thereby grouping our features a certain way, to aim for an "ideal" curve that is already known to produce pleasing results.A simple set of query tools for streamlining style assists from statistics will be used to create a few examples from troublesome data.
Schlagwörter