外置路径

可以方便地计算您在外业某个要素的行程。 通过在QGIS中简单配置属性表单，可以在外业工作时通过超链接快速访问谷歌地图中的导航工具。

在QGIS中配置属性表单控件

桌面端筹备工作

此处是一个导航到点图层要素的示例。

Create a new field in your data table (datatype text). In the attribute form settings, select "attachment" as widget type. Tick "Display a hyperlink for document path (read-only)". Then enter the following expression as default value:

concat(
  'https://www.google.com/maps/dir/?api=1&destination=',
  y(transform($geometry, layer_property(@layer, 'crs'), 'EPSG:4326')),
  '%2C',
  x(transform($geometry, layer_property(@layer, 'crs'), 'EPSG:4326')),
  '&travelmode=driving'
)

如果要对几何图形进行修改，请勾选 "更新时应用默认值"。

If you simply want to show your feature location in Google Maps, you can use the following expression:

concat( 'https://maps.google.com?q=',
  y(transform($geometry, layer_property(@layer, 'crs'),'EPSG:4326')),
  '%2C',
  x(transform($geometry, layer_property(@layer, 'crs'),'EPSG:4326')),
  '&zoom=19&t=h')

用法

QField界面

单击地图上想要导航到或在谷歌地图中打开的要素。在属性表单中，单击指向谷歌地图的链接。