awapic / ic Goto Github PK

Thanks for the plugin, it is very interesting to use, along with reading your book.

I do not have an Issue per se. As you do not have a Discussion section, I can only post here.

The advice you gave to use the simplify tool (Issue #1) was very helpful in terms of speed and in finishing the IC computation.

After some time (errors) and step-wise using distance increments, I was able to successfully complete an IC run for a walking distance of 400 m.

However I have only a vague grasp of whether I have a properly formatted the "blocks" upon which to operate the IC tool.
Like Issue 1, the blocks are not regular grids and were derived from a land use file, "dissolved" using AwaP, then simplified.
There are some large white spaces of public areas (e.g. parks, plaza etc).

Would you be able to comment on the attached files as to whether I have missed something or improve?
Attached is the original land use, the simplified blocks, the starting point and the result (400 m)

Thanks for any suggestions, or confirmation that all is OK.

Landuse.zip
Awap1394_simplified.zip
IC_starting_point.zip
IC_10729_400m.zip

There has been a report that the plugin is not working in QGIS 3.24.2 (Thanks Rachid for reporting!) and I have seen the same issue in other newer versions of QGIS. The plugin can be set up and started but it would not produce any results.
I have tested the plugin on my Ubuntu machine and QGIS 3.22.4 and found an exception in the following line:

The data is in this GeoPackage:
IC plugin bug.zip

Albury dataset

Note: this dataset should be in MGA Zone 55. Reproject the data to EPSG:28355 before trying.

Blocks layer: Albury blocks - reprojected temporary layer
Dead-end removal: NO
Starting point layer; Albury startingpoint - reprojected temporary layer
Max walking distance: 200 m
--> succeeds

Blocks layer: Albury blocks - reprojected temporary layer
Dead-end removal: YES, 40 m
Starting point layer: Albury startingpoint - reprojected temporary layer
Max walking distance: 200 m
--> fails with following error:

Traceback (most recent call last):
  File "C:/Users/.../AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\interfacecatchment\interface_catchment.py", line 904, in execute
    'FIELD_PRECISION' : 1,
  File "C:/PROGRA~1/QGIS3~1.12/apps/qgis/./python/plugins\processing\tools\general.py", line 106, in run
    return Processing.runAlgorithm(algOrName, parameters, onFinish, feedback, context)
  File "C:/PROGRA~1/QGIS3~1.12/apps/qgis/./python/plugins\processing\core\Processing.py", line 181, in runAlgorithm
    raise QgsProcessingException(msg)
_core.QgsProcessingException: There were errors executing the algorithm.

Blocks layer: Albury blocks - reprojected temporary layer
Dead-end removal: YES, 40 m
Starting point layer: Albury startingpoint - reprojected temporary layer
Max walking distance: 280 m
--> QGIS hangs

Carlton dataset

Blocks layer: Carlton blocks
Dead-end removal: NO
Starting point layer; Carlton startingpoint
Max walking distance: 200 m
--> succeeds

Blocks layer: Carlton blocks
Dead-end removal: YES, 40 m
Starting point layer; Carlton startingpoint
Max walking distance: 250 m
--> succeeds

Blocks layer: Carlton blocks
Dead-end removal: YES, 40 m
Starting point layer; Carlton startingpoint
Max walking distance: 200 m
--> fails with following error:

Traceback (most recent call last):
              File "C:/Users/.../AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\interfacecatchment\interface_catchment.py", line 908, in execute
              IC = round(next(walkable_lines_layer.getFeatures())['IC'])
             TypeError: type QVariant doesn't define __round__ method

Blocks layer: Carlton blocks
Dead-end removal: YES, 40 m
Starting point layer; Carlton startingpoint
Max walking distance: 400 m
--> QGIS hangs

Version info

Python version: 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)] 
QGIS version: 3.12.3-București București, 8234261527