Geographic Information Systems Questions, Problems & Solutions : TransWikia.com ~ Page 91

Using flags in new-style QGIS Processing Algorithms

In QGIS 3.6+, there are two different ways to construct a Processing Algorithm.Defining a class inherited from QgsProcessingAlgorithm. In this case, I can define flags for an algorithm as follows:...

Asked on 08/10/2021

0 answer

Multipatch multiple slice for creating building floors?

I'm searching for a method to create multiple horizontal slices at set intervals on a multipatch object. The slice function in Argis Pro allows only for one horizontal (or vertical)...

Asked on 08/10/2021

0 answer

Generating start and end points for LineStrings

I want to create start and endpoints in QGIS for a Linestring shapefile. I tried using the "QChainage Plugin" but was not useful. Can someone suggest a...

Asked on 08/10/2021 by Duffer

5 answer

QGIS Export file Automatic Geometry Type issue

It appears that the new version of QGIS has an issue whereby if you save a new file (using 'Export > Save Features as) and then select 'Automatic' for the...

Asked on 08/10/2021

0 answer

Recovering Model which crashed ArcGIS and was lost?

I was working on a very large model (that I now wish I had broken into more submodels) that crashed ArcGIS. Before it crashed I saw an error that I...

Asked on 08/10/2021 by matthewiannowlin

2 answer

Merging TIFFs while retaining details in GDAL

I am currently trying to merge overlapping raster TIFFs into one single, continuous image. Just using Merge results in a raster with borders, and it is unsatisfactory :...

Asked on 08/10/2021 by Aayush Panda

3 answer

GeoPandas dataframe from PostGIS table having date column

I have this PostgreSQL PostGIS database and I want to read this data in GeoPandas. I am able to create the GeoPandas...

Asked on 08/10/2021

1 answer

Extract shapely polygon from matplotlib hexbin polycollection

I'm trying to extract all the vertices of hexagons that are returned from plt.hexbin. I then want to eventually convert them to shapely polygons, so I can use them with...

Asked on 08/10/2021 by Sam Comber

1 answer

Creating categorized renderer with SVG symbols using PyQGIS

I'm trying to create a renderer with SVG symbols and I can't seem to find any example on this. Inspired from categorized renderer for regular symbols, I wrote this, but...

Asked on 08/10/2021

1 answer

Convert DSM to DTM and nDSM

I have some DSM GeoTIFF files and I want to convert them to DTM and then obtain nDSM by subtracting DTM from DSM.Is there any way to do it?...

Asked on 08/09/2021 by Parsa

2 answer

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