QGIS:创建项目的HTML web地图时出现问题

Question

在我的项目解决后，我已经将其导出到GeoPDF，并且还想创建一个超文本标记语言版本。

在插件管理器中添加qgis2web，重新启动QGIS。

当我选择Web/qgis2web/create a web map时，程序会让我的鼠标旋转2-3分钟，然后显示一些Python错误，这超出了我的能力范围。

QGIS 3.15

GDAL 3

Python 3.7

OSX高山(10.13.6)

Mac mini 2011年中

2.3Ghz i5

16 GB RAM

我收到的错误如下所示：

An alternative, ballpark-only transform was used when transforming coordinates between EPSG:26919 - NAD83 / UTM zone 19N and EPSG:3857 - WGS 84 / Pseudo-Mercator. The results may not match those obtained by using the preferred operation:
Possibly an incorrect choice of operation was made for transformations between these reference systems. Check the Project Properties and ensure that the selected transform operations are applicable over the whole extent of the current project.

2020-10-25T00:43:03     WARNING    Python error : An error has occurred while executing Python code: See message log (Python Error) for more details.
2020-10-25T00:43:03     WARNING    Used a ballpark transform from EPSG:26919 to EPSG:3857

Python Error
2020-10-25T00:43:03     WARNING    Traceback (most recent call last):
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/utils.py", line 442, in exportRaster
              "OUTPUT": out_raster})
              File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins/processing/tools/general.py", line 108, in run
              return Processing.runAlgorithm(algOrName, parameters, onFinish, feedback, context)
              File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins/processing/core/Processing.py", line 153, in runAlgorithm
              raise QgsProcessingException(msg)
             _core.QgsProcessingException: Unable to execute algorithm
             Could not load source layer for INPUT: /var/folders/kn/4rm9tz_s6y39mr0rvfjjq3k80000gp/T/small_point_nw121603600920_piped_3857.tif not found
             
             During handling of the above exception, another exception occurred:
             
             Traceback (most recent call last):
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/qgis2web.py", line 59, in run
              self.dlg = MainDialog(self.iface)
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/maindialog.py", line 159, in __init__
              self.autoUpdatePreview()
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/maindialog.py", line 334, in autoUpdatePreview
              self.previewMap()
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/maindialog.py", line 337, in previewMap
              preview_file = self.createPreview()
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/maindialog.py", line 300, in createPreview
              dest_folder=utils.tempFolder()).index_file
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/olwriter.py", line 91, in write
              folder=dest_folder)
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/olwriter.py", line 131, in writeOL
              popup, json, restrictToExtent, extent, feedback, matchCRS)
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/utils.py", line 237, in exportLayers
              exportRaster(layer, count, layersFolder, feedback, iface, matchCRS)
              File "/Users/house/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/qgis2web/utils.py", line 444, in exportRaster
              shutil.copyfile(piped_3857, out_raster)
              File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/shutil.py", line 120, in copyfile
              with open(src, 'rb') as fsrc:
             FileNotFoundError: [Errno 2] No such file or directory: '/var/folders/kn/4rm9tz_s6y39mr0rvfjjq3k80000gp/T/small_point_nw121603600920_piped_3857.tif'

Answer 1

我在QGIS3.20.0 "Odense“上遇到了类似的错误(我在this blog post的末尾发布了整个错误消息)。我的解决方案是通过QGIS3.16“汉诺威”(LTS)在qgis2web插件上导出地图，这样算法运行起来就没有问题了。