{"id":1352,"date":"2026-07-27T02:21:52","date_gmt":"2026-07-27T02:21:52","guid":{"rendered":"https:\/\/www.vpascode.com\/vn\/docs\/uncategorized\/echarts-playbook\/treemap-chart-hierarchical-volumes-and-nested-proportions\/"},"modified":"2026-07-30T01:27:57","modified_gmt":"2026-07-30T01:27:57","slug":"treemap-chart-hierarchical-volumes-and-nested-proportions-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/vn\/docs\/vpascode-docs\/echarts-playbook\/treemap-chart-hierarchical-volumes-and-nested-proportions-guide\/","title":{"rendered":"Treemap Chart: Hierarchical Volumes and Nested Proportions"},"content":{"rendered":"

When presenting multi-level hierarchical datasets or displaying large visual breakdowns where space is at a premium, the Treemap Chart<\/strong> provides an efficient visual solution. By tiling nested rectangles into a unified bounding area, treemaps encode numerical values through rectangle area size, allowing users to evaluate relative proportions across complex nested structures<\/em>\u2014such as disk space usage, product catalog revenue, or budget allocations across parent and child departments.<\/p>\n

The Mechanics of Treemap Charts<\/h2>\n

In Apache ECharts, treemaps use type: 'treemap'<\/code>. The series expects a tree-structured data<\/code> array where each object contains a name<\/code>, a quantitative value<\/code>, and an optional children<\/code> array for deeper nested levels.<\/p>\n

1. Essential Setup<\/h3>\n

To construct a basic treemap, define a hierarchical data array with nested children<\/code> and set type: 'treemap'<\/code> inside your series configuration:<\/p>\n

\r\n
\r\n ECharts<\/span>\r\n \r\n <\/path><\/path><\/svg>\r\n Edit ECharts in VPasCode<\/span>\r\n <\/a>\r\n <\/div>\r\n
\r\n 
option = {\r\n    tooltip: {\r\n        formatter: '{b}: ${c}'\r\n    },\r\n    series: [\r\n        {\r\n            type: 'treemap',\r\n            data: [\r\n                {\r\n                    name: 'Electronics',\r\n                    value: 400,\r\n                    children: [\r\n                        { name: 'Phones', value: 240 },\r\n                        { name: 'Laptops', value: 160 }\r\n                    ]\r\n                },\r\n                {\r\n                    name: 'Apparel',\r\n                    value: 300,\r\n                    children: [\r\n                        { name: 'Shirts', value: 180 },\r\n                        { name: 'Shoes', value: 120 }\r\n                    ]\r\n                }\r\n            ]\r\n        }\r\n    ]\r\n};<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit ECharts in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n
\"\"<\/p>\n
 <\/p>\n
Advanced Structural Techniques<\/h2>\n
Treemaps can be configured with multi-level styling rules, color gradient mappings, and interactive drill-down controls for deep data trees.<\/p>\n
1. Multi-Level Breadcrumb Drill-Down<\/h3>\n
Enable top legends and breadcrumb navigation to allow users to identify top-level categories and navigate smoothly into nested sub-directories:<\/p>\n            
\r\n                                
\r\n                    ECharts<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit ECharts in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
option = {\r\n    tooltip: {\r\n        trigger: 'item',\r\n        formatter: '{b}: {c} GB'\r\n    },\r\n    legend: {\r\n        top: '5%',\r\n        left: 'center',\r\n        data: ['System Drive (C:)', 'Data Drive (D:)']\r\n    },\r\n    series: [\r\n        {\r\n            type: 'treemap',\r\n            top: '18%',\r\n            bottom: '12%',\r\n            leafDepth: 1, \/\/ Shows one level at a time with click-to-drill-down\r\n            breadcrumb: {\r\n                show: true,\r\n                left: 'center',\r\n                bottom: '2%'\r\n            },\r\n            levels: [\r\n                {\r\n                    itemStyle: {\r\n                        borderColor: '#555',\r\n                        borderWidth: 2,\r\n                        gapWidth: 2\r\n                    }\r\n                },\r\n                {\r\n                    colorSaturation: [0.3, 0.6],\r\n                    itemStyle: {\r\n                        borderWidth: 1,\r\n                        gapWidth: 1,\r\n                        borderColorSaturation: 0.7\r\n                    }\r\n                }\r\n            ],\r\n            data: [\r\n                {\r\n                    name: 'System Drive (C:)',\r\n                    value: 500,\r\n                    children: [\r\n                        { name: 'Windows', value: 120 },\r\n                        { name: 'Program Files', value: 230 },\r\n                        { name: 'Users', value: 150 }\r\n                    ]\r\n                },\r\n                {\r\n                    name: 'Data Drive (D:)',\r\n                    value: 800,\r\n                    children: [\r\n                        { name: 'Media', value: 450 },\r\n                        { name: 'Backups', value: 250 },\r\n                        { name: 'Projects', value: 100 }\r\n                    ]\r\n                }\r\n            ]\r\n        }\r\n    ]\r\n};<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit ECharts in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n
\"\"<\/p>\n
 <\/p>\n
Fine-Tuning Layout and Styling<\/h2>\n
Applying gap widths, clean borders, and distinct level colors keeps nested rectangles organized and visually readable.<\/p>\n
1. Custom Cell Borders and Label Alignment<\/h3>\n
Tweak gapWidth<\/code> and label<\/code> configurations to maintain distinct boundaries between parent containers and child segments:<\/p>\n            
\r\n                                
\r\n                    ECharts<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit ECharts in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
option = {\r\n    series: [\r\n        {\r\n            type: 'treemap',\r\n            roam: false, \/\/ Disables manual zooming\/panning\r\n            label: {\r\n                show: true,\r\n                formatter: '{b}\\n{c}'\r\n            },\r\n            itemStyle: {\r\n                borderColor: '#ffffff',\r\n                borderWidth: 2,\r\n                gapWidth: 2\r\n            },\r\n            data: [\r\n                {\r\n                    name: 'North America',\r\n                    value: 520,\r\n                    itemStyle: { color: '#5470c6' }\r\n                },\r\n                {\r\n                    name: 'Europe',\r\n                    value: 380,\r\n                    itemStyle: { color: '#91cc75' }\r\n                },\r\n                {\r\n                    name: 'Asia Pacific',\r\n                    value: 450,\r\n                    itemStyle: { color: '#fac858' }\r\n                },\r\n                {\r\n                    name: 'Latin America',\r\n                    value: 190,\r\n                    itemStyle: { color: '#ee6666' }\r\n                }\r\n            ]\r\n        }\r\n    ]\r\n};<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit ECharts in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n
\"\"<\/p>\n
 <\/p>\n
Strategic Best Practices<\/h2>\n
    \n
  • Use gapWidth<\/code> for Nesting Visibility:<\/strong> Adding a small gapWidth<\/code> (e.g., 2px to 4px) between nested rectangles creates clear spacing between parent categories and child sub-items.<\/li>\n
  • Enable Breadcrumbs for Deep Hierarchies:<\/strong> When displaying 3 or more nested levels, enable `breadcrumb: { show: true }` so users can easily trace their location and navigate back up.<\/li>\n
  • Keep Labels Concise:<\/strong> Text can easily spill over small leaf rectangles. Combine short names with tooltips or use leafDepth<\/code> to hide tiny sub-rectangles until zoomed in.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
    When presenting multi-level hierarchical datasets or displaying large visual breakdowns where space is at a premium, the Treemap Chart provides an efficient visual solution. By tiling nested rectangles into a unified bounding area, treemaps encode numerical values through rectangle area…<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":1254,"menu_order":17,"template":"","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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