This section documents API usage specific to this template, so for an introduction we suggest you refer to the generic API documentation instead.

Template data

There are three different formats in which you can supply data to this template. The most convenient for you to use likely depends on the source of your data, as described below.

1. Array of arrays, and a bindings object

You can supply arrays of arrays to opts.data, which might look like:

{
    data: {
        routes: [
            [ "RoutesColumn1Value1", "RoutesColumn2Value1",
            [ "RoutesColumn1Value2", "RoutesColumn2Value2",
            [ "RoutesColumn1Value3", "RoutesColumn2Value3",
            ...
        ],
        locations: [
            [ "LocationsColumn1Value1", "LocationsColumn2Value1",
            [ "LocationsColumn1Value2", "LocationsColumn2Value2",
            [ "LocationsColumn1Value3", "LocationsColumn2Value3",
            ...
        ],
        regions: [
            [ "RegionsColumn1Value1", "RegionsColumn2Value1",
            [ "RegionsColumn1Value2", "RegionsColumn2Value2",
            [ "RegionsColumn1Value3", "RegionsColumn2Value3",
            ...
        ]
    }
}

where each array of arrays represents the rows in a data sheet.

To tell the API how the values from each column should be associated with the keys that the template is expecting, you must also supply an object attached to opts.bindings. (The meanings of the keys in the bindings object are documented below.) The minimal bindings you can supply for this template are as shown in this example:

{
    template: "@flourish/3d-arc-map",
    version: "8",
    bindings: {
        routes: {
            source: 0, // index of a column in your data
            target: 1, // index of a column in your data
        },
        locations: {
            id: 0, // index of a column in your data
            latitude: 1, // index of a column in your data
            longitude: 2, // index of a column in your data
        },
        regions: {
            
        }
    },
    data: {
        routes: [
            [ "RoutesColumn1Value1", "RoutesColumn2Value1",
            [ "RoutesColumn1Value2", "RoutesColumn2Value2",
            [ "RoutesColumn1Value3", "RoutesColumn2Value3",
            ...
        ],
        locations: [
            [ "LocationsColumn1Value1", "LocationsColumn2Value1",
            [ "LocationsColumn1Value2", "LocationsColumn2Value2",
            [ "LocationsColumn1Value3", "LocationsColumn2Value3",
            ...
        ],
        regions: [
            [ "RegionsColumn1Value1", "RegionsColumn2Value1",
            [ "RegionsColumn1Value2", "RegionsColumn2Value2",
            [ "RegionsColumn1Value3", "RegionsColumn2Value3",
            ...
        ]
    }
}

All possible bindings that you can supply are shown in this example:

{
    template: "@flourish/3d-arc-map",
    version: "8",
    bindings: {
        routes: {
            source: 0, // index of a column in your data
            target: 1, // index of a column in your data
            width: 2, // index of a column in your data
            filter: 3, // index of a column in your data
            category: 4, // index of a column in your data
            metadata: [5, 6, ...], // index(es) of column(s) in your data
        },
        locations: {
            id: 0, // index of a column in your data
            latitude: 1, // index of a column in your data
            longitude: 2, // index of a column in your data
            name: 3, // index of a column in your data
            category: 4, // index of a column in your data
        },
        regions: {
            geojson: 0, // index of a column in your data
        }
    },
    data: {
        routes: [
            [ "RoutesColumn1Value1", "RoutesColumn2Value1",
            [ "RoutesColumn1Value2", "RoutesColumn2Value2",
            [ "RoutesColumn1Value3", "RoutesColumn2Value3",
            ...
        ],
        locations: [
            [ "LocationsColumn1Value1", "LocationsColumn2Value1",
            [ "LocationsColumn1Value2", "LocationsColumn2Value2",
            [ "LocationsColumn1Value3", "LocationsColumn2Value3",
            ...
        ],
        regions: [
            [ "RegionsColumn1Value1", "RegionsColumn2Value1",
            [ "RegionsColumn1Value2", "RegionsColumn2Value2",
            [ "RegionsColumn1Value3", "RegionsColumn2Value3",
            ...
        ]
    }
}

2. Array of objects with arbitrary keys, and a bindings object

This format is most likely useful when you have data from an external source, such as CSV data loaded from d3-dsv. You should supply this attached to the opts.data, which might look like:

{
        routes: [
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            ...
        ],
        locations: [
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            ...
        ],
        regions: [
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            ...
        ]
    }

... but with the keys being the column headers from your source data instead. You must also supply an object attached to opts.bindings. The minimal bindings you can supply for this template are as shown in this example:

{
    template: "@flourish/3d-arc-map",
    version: "8",
    bindings: {
        routes: {
            source: "RoutesHeader1",
            target: "RoutesHeader2",
        },
        locations: {
            id: "LocationsHeader1",
            latitude: "LocationsHeader2",
            longitude: "LocationsHeader3",
        },
        regions: {
            
        }
    },
    data: {
        routes: [
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            ...
        ],
        locations: [
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            ...
        ],
        regions: [
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            ...
        ]
    }
}

All possible bindings that you can supply are shown in this example:

{
    template: "@flourish/3d-arc-map",
    version: "8",
    bindings: {
        routes: {
            source: "RoutesHeader1",
            target: "RoutesHeader2",
            width: "RoutesHeader3",
            filter: "RoutesHeader4",
            category: "RoutesHeader5",
            metadata: ["RoutesHeader6", "RoutesHeader7", ...],
        },
        locations: {
            id: "LocationsHeader1",
            latitude: "LocationsHeader2",
            longitude: "LocationsHeader3",
            name: "LocationsHeader4",
            category: "LocationsHeader5",
        },
        regions: {
            geojson: "RegionsHeader1",
        }
    },
    data: {
        routes: [
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            { "RoutesHeader1": ..., "RoutesHeader2": ..., ... },
            ...
        ],
        locations: [
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            { "LocationsHeader1": ..., "LocationsHeader2": ..., ... },
            ...
        ],
        regions: [
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            { "RegionsHeader1": ..., "RegionsHeader2": ..., ... },
            ...
        ]
    }
}

(As before, the keys containing "Header" would be replaced by column names from your data source.)

3. Array of objects with template-defined keys

There is an alternative format you can use, which is likely to be easier to use if your data is not from a spreadsheet source. With this alternative format you supply your data to the template as an array of objects, attached to opts.data, where the keys must be those used by the template, as documented below. In this case there is no need to supply a bindings object, since the key names are already those expected by the template. The required properties in the data object are as follows (scroll down for a description of what each property is):

{
    template: "@flourish/3d-arc-map",
    version: "8",
    data: {
    routes: [
        {
            source: ...,
            target: ...,
            metadata: [...]
        },
        ...
    ],
    locations: [
        {
            id: ...,
            latitude: ...,
            longitude: ...
        },
        ...
    ]
},
    ...
}

And the full list of all possible properties is as follows:

{
    template: "@flourish/3d-arc-map",
    version: "8",
    data: {
    routes: [
        {
            source: ...,
            target: ...,
            width: ...,
            filter: ...,
            category: ...,
            metadata: [...]
        },
        ...
    ],
    locations: [
        {
            id: ...,
            latitude: ...,
            longitude: ...,
            name: ...,
            category: ...
        },
        ...
    ],
    regions: [
        {
            geojson: ...
        },
        ...
    ]
},
    ...
}

Meanings of the template data keys:

• routes.source: The column containing the code for the arc's source. This should match the codes used in the <b>Locations</b> datasheet.
• routes.target: The column containing the code for the arc's target. This should match the codes used in the <b>Locations</b> datasheet.
• routes.width: Optional, a column containing a value for the arc, which can be used to specify its thickness
• routes.filter: Optional, a column to filter visible arcs by
• routes.category: Optionally, a column containing a category for the arc, which can be used to specify its color. Overrides the category in the <b>Locations</b> datasheet, if both are specified.
• routes.metadata: One or more columns of information (text, <a href ="https://help.flourish.studio/article/46-how-to-add-images-to-your-visualization">image URLs</a>, <a href ="https://help.flourish.studio/article/259-how-to-embed-charts-in-your-popups-or-panels">embedded charts</a> etc) to include in custom <a href="https://help.flourish.studio/article/69-how-to-add-custom-content-to-your-popups">popups and panels</a>
• locations.id: The column containing the location code. Should match the codes used in the Arcs sheet
• locations.latitude: Latitude for each location, specified in decimal degrees
• locations.longitude: Longitude for each location, specified in decimal degrees
• locations.name: Optional, a column containing the name of the location, to show in popup
• locations.category: Optional, a column containing the category of the arc, which can be used to specify its color
• regions.geojson: geojson

Template settings

Options for opts.state.

Arcs

arc.arc_thickness number

Thickness.

arc.brushing_enabled boolean

Brushing enabled.

arc.brushing_brush_source boolean

Brush source.

arc.brushing_brush_target boolean

Brush target.

arc.brushing_brush_radius number

Brush radius (meters).

arc.arc_palette_enabled boolean

Type.

arc.arc_source_color color

Source color.

arc.arc_source_opacity number

Source opacity.

arc.arc_target_color color

Target color.

arc.arc_target_opacity number

Target opacity.

arc.arc_palette.scale_type string

Scale type.

arc.arc_palette.categorical_type string

arc.arc_palette.categorical_palette colors

Palette.

arc.arc_palette.categorical_extend boolean

Auto-extend. Automatically generate additional colours when needed to avoid the palette colours being used more than once.

arc.arc_palette.categorical_seed_color color

Seed color. Initial color in generated sequence (avoid shades of grey).

arc.arc_palette.categorical_rotation_angle number

Hue rotation angle. Angle, in degrees, between one generated colour and the next. The default value, ~360/(Golden ratio), ensures adjacent hues are not too similar.

arc.arc_palette.categorical_color_space string

arc.arc_palette.categorical_custom_palette text

Custom overrides. Type the name of the entity whose colour you want to set, a colon and then a colour (using a name, hex-code or rgb declaration). Multiple colours can be set using multiple lines. For example:

---

Party 1: red
Party 2: #4455AA
Party 3: rgb(30,168,26)

arc.arc_palette.sequential_palette string

Palette.

arc.arc_palette.sequential_custom_min color

Minimum color.

arc.arc_palette.sequential_custom_max color

Maximum color.

arc.arc_palette.sequential_color_space string

arc.arc_palette.sequential_reverse boolean

Reverse scale.

arc.arc_palette.diverging_palette string

Palette.

arc.arc_palette.diverging_custom_min color

Minimum color.

arc.arc_palette.diverging_custom_mid color

Midpoint color.

arc.arc_palette.diverging_custom_max color

Maximum color.

arc.arc_palette.diverging_color_space string

arc.arc_palette.diverging_reverse boolean

Reverse scale.

Map

map.style_enabled boolean

map.style_base string

Map style.

map.style_monochrome_color color

Map base color.

map.style_show_borders boolean

Display borders.

map.style_show_roads boolean

Display transport.

map.style_show_labels boolean

Display labels.

map.style_show_landuse boolean

Display land use.

map.style_show_water boolean

Display water.

map.map_language_auto boolean

Detect language. Automatically changes the language used on the base map to match the viewer's language settings.

map.map_language_alts boolean

Display alternatives. Whether or not to display latin alternatives for non-latin languages (or vice versa)

map.map_language string

Language.

map.map_zoom_min number

Min zoom.

map.map_zoom_max number

Max zoom.

map.map_bound_position boolean

Limit viewport bounds.

map.map_lat_min number

Min latitude.

map.map_lat_max number

Max latitude.

map.map_lng_min number

Min longitude.

map.map_lng_max number

Max longitude.

map.map_initial_type string

Initial viewport. By default, the initial viewport of the map is automatically set to include every visible object. The "centroid" option allows you to select a custom latitude, longitude and zoom. The "bounds" option lets you specify a custom bounding box for the viewport to enclose.

map.map_initial_pitch number

Pitch.

map.map_initial_bearing number

Bearing.

map.map_initial_lat number

Latitude.

map.map_initial_lng number

Longitude.

map.map_initial_zoom number

Zoom.

map.map_initial_bounds_lat_min number

Min latitude.

map.map_initial_bounds_lng_min number

Min longitude.

map.map_initial_bounds_lat_max number

Max latitude.

map.map_initial_bounds_lng_max number

Max longitude.

map.map_interactive boolean

Allow user interaction.

map.map_hijack_scroll boolean

Require cmd/ctrl to zoom when scrolling.

map.controls_geolocator_enabled boolean

Use geolocator control.

map.controls_geolocator_alignment string

Geolocator control position.

map.controls_fullscreen_enabled boolean

Use fullscreen control.

map.controls_fullscreen_alignment string

Fullscreen control position.

map.animation_enabled boolean

Enable animation.

map.animation_duration number

Duration.

Inset map

minimap.minimap_display boolean

Display map.

minimap.minimap_rotate boolean

Rotate with camera.

minimap.minimap_custom_colors boolean

Customise colours.

minimap.minimap_fill color

Region fill color.

minimap.minimap_ocean_color color

Ocean color.

minimap.minimap_stroke color

Region stroke color.

minimap.minimap_outline color

Outline color.

minimap.minimap_show_bounds boolean

Display viewport bounds.

minimap.minimap_bounds_color color

Region bounds color.

minimap.minimap_bounds_opacity number

Region bounds opacity.

minimap.minimap_size_type string

Size units.

minimap.minimap_size_desktop_pixels number

Pixels (desktop).

minimap.minimap_size_mobile_pixels number

Pixels (mobile).

minimap.minimap_size_desktop_viewport number

Screen % (desktop).

minimap.minimap_size_mobile_viewport number

Screen % (mobile).

Filtering

filter_controls.type string

Data type.

filter_controls.temporal_format string

Date/time format in data. The date/time format in your data sheet. Used only to sort the data, if required. If your format isn’t in the list, you can enter a custom format using d3-time-format syntax. See npmjs.com/package/d3-time-format for details.

filter_controls.sort boolean

Sort menu.

filter_controls.control string

Control.

filter_controls.width number

Menu width.

filter_controls.play_button boolean

Include play button.

filter_controls.step_time number

Time between steps when playing. Measured in seconds, positive values move the slider left to right, negative values move the slider right to left.

filter_controls.loop boolean

Loop on play.

filter_controls.restart_pause number

Pause before loop restarts. Measured in seconds and in addition to the regular step time displayed above.

filter_controls.dropdown_icon_color color

Icon color.

filter_controls.slider_handle_color color

Handle and button color.

filter_controls.slider_track_color color

Track and label color.

Popup

popup.show_popups boolean

Popups.

popup.is_custom boolean

Popup contents.

popup.custom_template text

Popup content. The text to appear in the popup. You can use {{column_name}} to add a value from your data. It must be in a selected column, but you can add columns to “Metadata” if you just want to include them for use in the popup. Advanced users can include HTML to apply layouts, formatting, images, etc.

popup.show_pointer boolean

Pointer.

popup.show_shadow boolean

Shadow.

popup.style_popups boolean

Custom styling.

popup.text_color color

Text colour.

popup.align string

Alignment.

popup.font_size number

Font size.

popup.fill_color color

Fill colour.

popup.opacity number

Fill opacity.

popup.padding number

Padding.

popup.border_radius number

Radius. Corner radius of popup

Layout

Layout

layout.body_font font

Main font. This font will apply to the whole graphic by default, but you can optionally change the font for the title, subtitle, footer, etc in the Header and Footer settings panels.

layout.font_color color

Text color. This color will apply to the whole graphic by default, but you can optionally change the color for individual text elements, in other settings panels.

layout.background_color_enabled boolean

Color.

layout.background_image_enabled boolean

Image.

layout.background_color color

Background color.

layout.background_image_src url

Image URL.

layout.background_image_size string

Size.

layout.background_image_position string

Position.

layout.max_width_target string

Maximum width. Apply a maximum width to just the main graphic or everything (main graphic plus header, footer, etc)

layout.max_width number

Maximum width. Leave blank to stretch to container width

layout.max_width_align string

Align.

layout.layout_order string

Layout order.

layout.space_between_sections string

Space between sections.

layout.space_between_sections_custom number

Custom.

layout.margin_top number

Top.

layout.margin_right number

Right.

layout.margin_bottom number

Bottom.

layout.margin_left number

Left.

layout.border.enabled boolean

Show borders around visualisation.

layout.border.top.width number

Top.

layout.border.top.style string

Style.

layout.border.top.color color

Color.

layout.border.right.width number

Right.

layout.border.right.style string

Style.

layout.border.right.color color

Color.

layout.border.bottom.width number

Bottom.

layout.border.bottom.style string

Style.

layout.border.bottom.color color

Color.

layout.border.left.width number

Left.

layout.border.left.style string

Style.

layout.border.left.color color

Color.

layout.read_direction string

Read direction. This will change the reading direction of the main text elements on the page. Its not possible to adjust this on all elements such as axes. Note that when direction is set to "right to left" any alignment icons will be reversed.

layout.font_size_mobile_small number

layout.font_size_mobile_big number

layout.font_size_tablet number

layout.font_size_desktop number

layout.font_size_big_screen number

layout.breakpoint_mobile_small number

layout.breakpoint_mobile_big number

layout.breakpoint_tablet number

layout.breakpoint_desktop number

layout.breakpoint_big_screen number

Header

layout.header_align string

Alignment.

layout.title html

layout.title_styling boolean

Styling.

layout.title_font font

Title Font.

layout.title_size string

Size.

layout.title_size_custom number

Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3

layout.title_weight string

Weight.

layout.title_color color

Color.

layout.title_line_height number

Line height.

layout.title_space_above string

Space above.

layout.title_space_above_custom number

Custom.

layout.subtitle html

layout.subtitle_styling boolean

Styling.

layout.subtitle_font font

Subtitle Font.

layout.subtitle_size string

Size.

layout.subtitle_size_custom number

Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3

layout.subtitle_weight string

Weight.

layout.subtitle_color color

Color.

layout.subtitle_line_height number

Line height.

layout.subtitle_space_above string

Space above.

layout.subtitle_space_above_custom number

Custom.

layout.header_text html

layout.header_text_styling boolean

Styling.

layout.header_text_size string

Size.

layout.header_text_size_custom number

Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3

layout.header_text_weight string

Weight.

layout.header_text_color color

Color.

layout.header_text_line_height number

Line height.

layout.header_text_space_above string

Space above.

layout.header_text_space_above_custom number

Custom.

layout.header_border string

layout.header_border_width number

Width.

layout.header_border_color color

Color.

layout.header_border_style string

Style.

layout.header_border_space number

Space. Space between border and header text

layout.header_logo_enabled boolean

layout.header_logo_src url

Image.

layout.header_logo_alt string

Alt text.

layout.header_logo_link_url string

Link.

layout.header_logo_height number

Height.

layout.header_logo_align string

Align. Align logo inside either the header or the main visualisation container

layout.header_logo_position_inside string

Position.

layout.header_logo_position_outside string

Position.

layout.header_logo_margin_top number

Top.

layout.header_logo_margin_right number

Right.

layout.header_logo_margin_bottom number

Bottom.

layout.header_logo_margin_left number

Left.

Footer

layout.footer_align string

Alignment.

layout.footer_text_size number

Size.

layout.footer_text_color color

Color.

layout.footer_styling boolean

Advanced footer styles.

layout.footer_font font

Font.

layout.footer_text_weight string

Weight.

layout.source_name string

Source name.

layout.source_url string

Source url.

layout.multiple_sources boolean

Multiple sources.

layout.source_name_2 string

Source name.

layout.source_url_2 string

Source url.

layout.source_name_3 string

Source name.

layout.source_url_3 string

Source url.

layout.source_label string

Source label.

layout.footer_note string

Note.

layout.footer_note_secondary string

Note (secondary). The secondary note is placed below the source and primary note

layout.footer_logo_enabled boolean

Image.

layout.footer_logo_src url

Image.

layout.footer_logo_src_light hidden

Image (light version). If provided this version will be used whenever the background colour is dark

layout.footer_logo_alt string

Alt text.

layout.footer_logo_link_url string

Link.

layout.footer_logo_height number

Height.

layout.footer_logo_margin number

Margin.

layout.footer_logo_order string

Position.

layout.footer_align_vertical string

V. align.

layout.footer_border string

layout.footer_border_width number

Width.

layout.footer_border_color color

Color.

layout.footer_border_style string

Style.

layout.footer_border_space number

Space. Space between border and footer text

Accessibility

layout.screenreader_text_primary text

Screenreader description. A text alternative to the visual content that will only be visible to screenreaders, e.g. “The line chart shows China consistently higher than the other countries since 1990”. Do not replicate your title, since that will also be read by screenreaders.

layout.screenreader_label string

Screenreader label. A short text label given to the main Flourish embed wrapper to provide an accessible name that is only visible to screenreaders. Added in the form of an "aria-label".

layout.screenreader_hide_primary boolean

Screenreader mode for main visual container. Whether the main visual container is visible to screenreaders. (Text in the header and footer are always available to screenreaders.)