A system, comprising: a memory adapted to store computer-executable instructions associated with a card overlay component and an interactive affordance; a mapping engine; and at least one hardware processor configured to execute said computer-executable instructions associated with the card overlay component and the interactive affordance; wherein the card overlay component is configured to present semantic cards in a card overlay of a mapping user interface, the semantic cards relating to respective search results of a search query during a session associated with the mapping engine, wherein the card overlay has a stacked view mode in which one of the semantic cards is visually overlaid on the map canvas of the mapping user interface together with an interactive affordance annotated with a count of the semantic cards; and wherein the card overlay has an overview mode in which at least a subset of the semantic cards is represented as an overview of individually viewable and selectable semantic cards, wherein said the semantic cards are represented in said overview mode side-by-side and visually overlaid on the map canvas of the mapping user interface; wherein the interactive affordance, when selected, enables switching the card overlay from the stacked view mode to the overview mode; wherein the mapping engine is configured to change the map canvas in response to selection of a semantic card of the overview mode so as to show a map canvas associated with the selected semantic card under the side-by-side presentation of the semantic cards presented in the overview mode; and wherein the system is configured to enable switching, in response to a user interaction, the card overlay from the overview mode to the stacked view mode in which the semantic card selected in the overview mode is visually overlaid on the map canvas associated with the selected semantic card so as to view the map canvas associated with the selected semantic card. a memory adapted to store computer-executable instructions associated with a card overlay component and an interactive affordance; a mapping engine; and at least one hardware processor configured to execute said computer-executable instructions associated with the card overlay component and the interactive affordance; wherein the card overlay component is configured to present semantic cards in a card overlay of a mapping user interface, the semantic cards relating to respective search results of a search query during a session associated with the mapping engine, wherein the card overlay has a stacked view mode in which one of the semantic cards is visually overlaid on the map canvas of the mapping user interface together with an interactive affordance annotated with a count of the semantic cards; and wherein the card overlay has an overview mode in which at least a subset of the semantic cards is represented as an overview of individually viewable and selectable semantic cards, wherein said the semantic cards are represented in said overview mode side-by-side and visually overlaid on the map canvas of the mapping user interface; wherein the interactive affordance, when selected, enables switching the card overlay from the stacked view mode to the overview mode; wherein the mapping engine is configured to change the map canvas in response to selection of a semantic card of the overview mode so as to show a map canvas associated with the selected semantic card under the side-by-side presentation of the semantic cards presented in the overview mode; and wherein the system is configured to enable switching, in response to a user interaction, the card overlay from the overview mode to the stacked view mode in which the semantic card selected in the overview mode is visually overlaid on the map canvas associated with the selected semantic card so as to view the map canvas associated with the selected semantic card.