Proj4 - TypeError: lib_namespaceObject 不是函数

问题描述

我正在尝试使用 proj4 转换一些坐标，但出现此错误

Uncaught (in promise) TypeError: lib_namespaceObject is not a function

proj4 从打字稿模块内部调用。 proj4 版本：2.6.3

我的代码：

import * as proj4 from 'proj4'
import * as atlas from 'azure-maps-control';

//...

fetch('...')
  .then(response => response.json())
  .then((data: atlas.data.FeatureCollection) => {
     data.features = data.features.filter(f => f.geometry);
     data.features.forEach(f => {
       let from = "+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0 +units=m +no_defs";
       let to = "+title=WGS 84 (long/lat) +proj=longlat +ellps=wgs84 +datum=wgs84 +units=degrees";

       f.geometry.coordinates[0] = proj4(from,to,f.geometry.coordinates[0] as any);
       f.geometry.coordinates[1] = proj4(from,f.geometry.coordinates[1] as any);
     });
  });

错误出现在行：

f.geometry.coordinates[0] = proj4(from,f.geometry.coordinates[0] as any)

解决方法

我现在开始工作了。不得不将导入更改为

import proj4 from 'proj4'

proj typescript typescript