# D3.js map visualization v7 **URL:** \ **Category:** Help\ **Created:** [April 25, 2022, 5:24pm UTC](https://talk.observablehq.com/t/d3-js-map-visualization-v7/6476 "2022-04-25T17:24:15Z")\ **Posts on this page:** 2\ **Page:** 1

**Author:** ![gluizon](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.observablehq.com/gluizon/32/6406_2.png) [@gluizon](https://talk.observablehq.com/u/gluizon)\ **Post date:** [April 25, 2022, 5:24pm UTC](https://talk.observablehq.com/t/d3-js-map-visualization-v7/6476/1 "2022-04-25T17:24:15Z")

Please guys, im trying to understand why this code doesn`t work for version 7 of d3.js. It` s working for version 4 ```auto ``` ---

**Author:** ![Fil](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.observablehq.com/fil/32/207_2.png) [@Fil](https://talk.observablehq.com/u/Fil)\ **Post date:** [April 25, 2022, 5:25pm UTC](https://talk.observablehq.com/t/d3-js-map-visualization-v7/6476/2 "2022-04-25T17:25:23Z")

d3.json now returns a promise, instead of calling a callback function. So you might want to try changing the call to `d3.json("world.geojson").then(function(data){ …`