Expression interpretation engine for computer map visualizations

A non-transitory computer-readable storage medium storing computer program instructions executable by a processor to perform operations of editing and representing property values for a digital map, the operations comprising:

• storing a library of expressions for styling a digital map, the library of expressions comprising at least one of data field lookup operations, logical operations, mathematical operations, string operations, and color operations;
• retrieving electronic map data from a style sheet corresponding to a vector map tile set for the digital map;
• displaying a user interface comprising:
• a property editor panel displaying a plurality of map styles that reference a portion of the electronic map data;
• and
• a visual map portion displaying a representation of the electronic map data with the map styles applied;
• for a selected map style, displaying in the property editor panel a plurality of style properties and a text field corresponding to a particular style property of the plurality of style properties for receiving expressions for the particular style property;
• receiving, via the text field, a portion of an expression to apply to the style property;
• determining, from the library of expressions, a set of suggested expressions corresponding to the style property based on the received portion of the expression;
• displaying at least one suggested expression of the set of suggested expressions at the property editor panel;
• retrieving inline documentation describing functionality of an expression for at least one suggested expression in the set of suggested expressions;
• displaying the retrieved inline documentation adjacent to the set of suggested expressions within the property editor panel;
• receiving user selection of a particular suggested expression from the displayed suggested expressions;
• applying the particular expression to the electronic map data for the style property;
• and
• rendering in the visual map portion an edited representation of the electronic map data for the style property with the particular expression applied.

A system, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium storing computer program instructions executable by the processor to perform operations of editing and representing property values for a digital map, the operations comprising:
• storing a library of expressions for styling a digital map, the library of expressions comprising at least one of data field lookup operations, logical operations, mathematical operations, string operations, and color operations;
• retrieving electronic map data from a style sheet corresponding to a vector map tile set for the digital map;
• displaying a user interface comprising:
• a property editor panel displaying a plurality of map styles that reference a portion of the electronic map data;
• and
• a visual map portion displaying a representation of the electronic map data with the map styles applied;
• for a selected map style, displaying in the property editor panel a plurality of style properties and a text field corresponding to a particular style property of the plurality of style properties for receiving expressions for the particular style property;
• receiving, via the text field, a portion of an expression to apply to the style property;
• determining, from the library of expressions, a set of suggested expressions corresponding to the style property based on the received portion of the expression;
• displaying at least one suggested expression of the set of suggested expressions at the property editor panel;
• retrieving inline documentation describing functionality of an expression for at least one suggested expression in the set of suggested expressions;
• displaying the retrieved inline documentation adjacent to the set of suggested expressions within the property editor panel;
• receiving user selection of a particular suggested expression from the displayed suggested expressions;
• applying the particular expression to the electronic map data for the style property;
• and
• rendering in the visual map portion an edited representation of the electronic map data for the style property with the particular expression applied.