BI ENGINEERING BI COMPONENT
Custom Looker Studio Visualization
A custom Looker Studio Community Visualization rendering multi-touch attribution journeys and funnel conversion drop-offs beyond native charting limits.
CATEGORY BI ENGINEERING
STACK & RUNTIME Looker Studio Community Viz API • JavaScript (ES6+) • D3.js • SVG / Canvas
Core Code Architecture:
Looker Studio Viz Draw Function Looker Studio Viz Draw Function
javascript
const dscc = require('@google/dscc');
const d3 = require('d3');
function drawViz(data) {
const container = document.getElementById('viz-container');
container.innerHTML = '';
const width = dscc.getWidth();
const height = dscc.getHeight();
const svg = d3.select(container)
.append('svg')
.attr('width', width)
.attr('height', height);
// Parse tabular dataset into node-link graph
const rows = data.tables.DEFAULT;
// Render attribution Sankey transitions...
}
dscc.subscribeToData(drawViz, { transform: dscc.tableTransform });
01
Why Native Charts Fail Executive Reporting
Standard Looker Studio scorecards and bar charts display aggregated metrics in isolation. They cannot visualize how a customer flows from paid social discovery to organic search and final purchase. By engineering a custom community visualization using the Looker Studio Viz API and D3.js, executives gain a single, interactive chart showing full multi-touch channel contribution.
- Combines Sessions, Channel Touchpoints, Conversions, and Revenue into a unified flow
- Dynamically formats bottleneck links in amber and red based on statistical drop-offs
- Deployable across any Looker Studio dashboard via custom manifest component ID
02
Data Contract & Schema Interface
The visualization defines strict dimensions and metric inputs.
| Field Role | Type | Description | Example Value |
|---|---|---|---|
| First Touch Channel | Dimension | Acquisition source/medium | "google / cpc" |
| Assisting Touch Channel | Dimension | Mid-funnel interaction | "newsletter / email" |
| Converting Touch Channel | Dimension | Final conversion source | "direct / none" |
| Conversion Value | Metric | Total purchase revenue generated | $142,500.00 |