Unanswered Questions
35,142 questions with no upvoted or accepted answers
34
votes
0
answers
3k
views
Leaflet v1 plugin: layer control for ungrouped, grouped, and nested-grouped layers
I need a Leaflet plugin which extends L.Control.Layers. I have the following requirements:
works with Leaflet 1.x
handles ungrouped layers alongside grouped ones
handles nested layer groups
does not ...
17
votes
0
answers
2k
views
Extract TopoJSON directly from PostGIS
I have a simple "region" table: id (TEXT), name (TEXT), geom (MULTIPOLYGON). Here's the query I can use to extract a GeoJSON FeatureCollection:
SELECT row_to_json(fc)
FROM (
SELECT '...
- 15.9k
14
votes
1
answer
632
views
Remove reference to raster layer object PyQGIS
I am developing a plugin to load a set of raster files on QGIS. When there is a large number of files to be loaded, the main UI freezes. So I use QgsTask to move the creation of raster layers to a ...
CommunityBot
- 1
14
votes
0
answers
758
views
High PostgreSQL/PostGIS memory and disk usage when saving QGIS project
Why would simply pressing the Save button in QGIS cause my local PostgreSQL instance to cause memory and disk usage to spike to "Not Responding" levels? Seems to me like the PostgreSQL ...
- 10.5k
12
votes
0
answers
316
views
Saving ArcGIS Pro symbology to PostGIS DB for each layer
I want to have a default style/symbology assigned to each layer in a PostGIS database so that whenever it is loaded in ArcGIS Pro, it will come up with the default style.
There is a way in QGIS to ...
- 64.4k
12
votes
0
answers
2k
views
Making polygon for every point in set using Voronoi diagram
I'm trying to make polygons from points, where each point will be represented by one polygon. I tried using Voronois, but the results are incomplete. While I more or less understand where this ...
- 2,932
12
votes
0
answers
576
views
Calculate volume of space defined by multiple overlapping 3D polygons
I have thousands of 3D polygons scattered in space but they mostly overlap with many of their neighbors in big extent.
Is there any way how to compute volume they define effectively?
I would love ...
- 19.4k
12
votes
0
answers
318
views
Processing post-execution script hook to clear scratch layers?
I've been cobbling together some Processing scripts for QGIS 2.18 (I'm not a fan of QGIS 3 scripts), and I keep running into one particular problem: my script creates a lot of scratch layers and they ...
- 565
12
votes
0
answers
328
views
ESRI Runtime Geodatabase Shape storage
Does anyone out there know the geometry storage encoding for ESRI's Runtime Geodatabase (.sqlite) format? aka mobile geodatabase.
There are 'GDB_ tables', 'st_ tables', 'RTREE indexes' and other ...
- 27.5k
11
votes
0
answers
818
views
PyQgis Exporting Print Layout: "ERROR 6: The PNG driver does not support update access to existing datasets."
I am trying to export a .tif loaded into a pre-configured print layout template and further exported as .png
def openLayer(project, fp, basename, vector=True):
layer = QgsVectorLayer(fp, basename) ...
- 10.5k
11
votes
0
answers
416
views
Multithreaded DB connection for QGIS plugin
I am using QGIS 2.18.21 and PostgreSQL 9.6. on a Windows 8 machine.
I am trying to do processing of a certain database task in the background, and I want the user to be able to continue to work in ...
- 64.4k
11
votes
0
answers
529
views
MapScript with Python 3
I am trying to build raster summarizing features into a GeoDjango webmap,
and would like to use the django-raster and django-wms packages to do so. I believe that I have them set up correctly, but am ...
- 12.6k
11
votes
0
answers
3k
views
How to prevent cross-world lines in ggplot world map?
I'm having issues displaying 'great circles' paths and polygons in ggmap, an extension of ggplot2. Please enter the following code to replicate my issues:
https://gist.github.com/Robinlovelace/...
- 8,263
11
votes
0
answers
1k
views
What is the convergence threshold for ArcGIS Iso Cluster?
The ArcGIS tool Iso Cluster Unsupervised Classification does not seem to have any documentation on the convergence threshold used in the tool. To compare, Erdas Imagine has all of the necessary ...
- 51k
10
votes
1
answer
595
views
How to use a custom function inside GEE ee.Reducer?
I have generated a segmentation using SNIC on GEE and calculated some statistics/features for each segment, using ee.Reducer e.g. mean, std, median, etc. I want to calculate more features based on my ...
CommunityBot
- 1