{"version":"1.0","type":"rich","title":"Create an equal area grid over a buffer of points","description":"This example visualizes a rectangular grid of points covering a 50-kilometer buffer around input locations, with each point representing the centroid of a grid cell in an equal-area projection. The SQL query first buffers the original NAD83 geometries, then unions and reprojects them into the Lambert equal-area projection (SRID 97314) to create an envelope, and finally generates a 1000-by-1000-meter grid using CartoDB’s `CDB_RectangleGrid` function. Each cell’s centroid is reprojected back to WGS84 (SRID 4326) for display, ensuring spatially uniform sampling across the buffered area.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-3859464?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}