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This example displays geographic markers on a Google Map for several Hawaiian locations, with each marker labeled by its population and linked to an info window showing details like elevation, number, and color coding from a CSV file. The map is initialized using the Google Maps JavaScript API with a terrain view centered on Hawaii. Data from `echteMega.csv` is loaded via D3.js v3, and each row triggers a marker creation with custom SVG icons and click listeners that open info windows. The visualization combines D3’s data loading with the Google Maps API for spatial rendering.
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forked from <a href='http://bl.ocks.org/TylerVaughan/'>TylerVaughan</a>'s block: <a href='http://bl.ocks.org/TylerVaughan/bc5e7d9fa1f1eaa9e39674550a002197'>project</a>