QGIS - 从 WMS 图层获取最近的邻居

Question

通常，为了检索两个向量层之间的最近邻居，我将使用“通过最近邻连接属性”算法。

在我的情况下，我有一个矢量图层和许多 WMS 层。

有没有办法从 WMS 图层获取最近的特征（我可以指定距离）。

这是一个例子： ！](https://i.sstatic.net/65LZ6jzB.png)

我中间有一个矩形多边形，我想将位于10公里以下的所有要素都列出到矩形多边形的属性表中。

有办法做到吗？

我尝试将 WMS 图层转换为矢量图层，但它不起作用。 还研究了一些其他算法，例如距离矩阵。

usage: gdal_polygonize.py [--help] [--help-general] [-q] [-8] [-o name=value] 
[-mask filename] [-nomask] [-b band] 
[-of ogr_format] [-lco name=value] [-overwrite] 
src_filename dst_filename [dst_layername] 
[dst_fieldname] 
gdal_polygonize.py: error: the following arguments are required: dst_filename
Traceback (most recent call last):
File "C:\PROGRA~1/QGIS33~1.1/apps/qgis/./python/plugins\processing\algs\gdal\GdalUtils.py", line 138, in on_stderr
val = ba.data().decode('UTF-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x82 in position 81: invalid start byte

The above exception was the direct cause of the following exception:

SystemError: <class 'PyQt5.QtCore.QByteArray'> returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: <class 'PyQt5.QtCore.QByteArray'> returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\PROGRA~1/QGIS33~1.1/apps/qgis/./python/plugins\processing\algs\gdal\GdalAlgorithm.py", line 133, in processAlgorithm
GdalUtils.runGdal(commands, feedback)
File "C:\PROGRA~1/QGIS33~1.1/apps/qgis/./python/plugins\processing\algs\gdal\GdalUtils.py", line 154, in runGdal
res = proc.run(feedback)
SystemError: <built-in method run of QgsBlockingProcess object at 0x000001E6E818DC10> returned a result with an error set

Answer 1

正如 Ian Turton 所解释的，WMS 图层是一张图片。我无法以我想要的方式从中获取信息。我会寻找 WFS 服务。