Questions tagged [python-3]

Use this tag when Python 3 (or any of its dot releases) is the version you are using.

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Python3 Replace “/” With “\” [closed]

I want to import several spatial csv files (points) into QGIS. The path to the folder, where the csv files are located is stored in the variable "Folder_Path". The file names are stored in a list. It ...
3
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1answer
1k views

Read numerical value of variable in NetCDF4 using Python

I need to undestand how I can get the numerical value of one channel IR_108 ( variable) in NetCDF4 and some other data: import numpy as np from netCDF4 import Dataset path = '/home/data/...
2
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1answer
1k views

Extracting lat , long & numeric value of one pixel for all variables in NetCDF4 file using Python?

I have an application with wxpython in which I can read and show NetCDF4 file and some information like x y coordinates. what I need is the numerical value or pixel value for the variable air dep ...
3
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0answers
658 views

Using both QGIS and native processing algorithms in standalone Python script?

I am developing a Python standalone script to process DEM in order to produce slope in vector format. I used PyQt5 to make a GUI to accept input data and parameters from user. My script is like this: ...
2
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0answers
434 views

PyCharm and ArcGIS Pro issue: Arcpy Must Run From Inside the Conda Environment,

I am getting the following error when running my python scripts in Pycharm, does anybody know how to fix it? it is very odd, because it was working just fine, then installed some updates on ArcGIS Pro ...
1
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1answer
82 views

Setting color of Simple Marker Layer from field using python 3

I'm trying to set up the colour of a QgsSimplerMarkerSymbolerLayer. Here is my code : sites=iface.activeLayer() single_symbol_renderer=sites.renderer() symbol=single_symbol_renderer.symbol() symbol....
6
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1answer
525 views

Explaining pyproj to_epsg min_confidence parameter?

Following on from this question How can I get epsg code in pyproj with version==2.1.3, I discovered that sometimes when intialising a pyproj Proj instance with a string ESPG code eventually results in ...
4
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1answer
174 views

Setting a Background Color with RVBT field with python

I'm trying to set the color of a background of a layer. To do this i created an attribute "Color" with the RVBT numbers associate to each feature. As in the picture, i want to set the color with those ...
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0answers
189 views

Set default version of Python in ArcGIS to 64-bit?

This is the output from Python terminal within ArcMap 10.6.1 for Windows 10: >>> import sys, numpy, matplotlib >>> print(sys.version, numpy.__version__, matplotlib.__version__) ('2....
3
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1answer
970 views

Setting reference frame for shapefile with pyshp?

I'm using pyshp to create new shapefiles with Python 3. My code runs without errors, but when I open the resulting file in ArcMap I get this error: The following datasource you added is missing ...
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0answers
45 views

Referencing image using GCP-file?

I'm trying to automate the actual geo-referencing in PyQgis/PyQt5. I went manually over the built-in GDAL Georeferencer in QGIS and saved a GCP-file. Also, the actual commands used for the conversion ...
2
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0answers
633 views

Python warnings in QGIS 3.4

I just opened the QGIS and this appeared. What does it mean? Is it serious problems? warning:/Applications/QGIS3.6.app/Contents/MacOS/../Resources/python/qgis/utils.py:672: DeprecationWarning: the ...
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0answers
135 views

Problems with LecoS plugin in QGIS on Mac Mojave

I wanted to install LecoS plugin in Qgis. But first error appears that I have to instal scipy for python in orderd to use plugin. Python was instaled using instructions from Qgis document, version 3....
1
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1answer
417 views

geoserver.catalog.FailedRequestError: Tried to make a GET request to http://localhost:8080/geoserver/workspaces.xml but got a 404 status code

I'm trying connect to geoserver via rest protocol by gsconfig-py3 in python3 ,I get this error, but when I type "http://localhost:8080/geoserver/rest" in browser I can see these items moreover when I ...
0
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1answer
307 views

Print elevation of different coordinates from .hgt file [closed]

I am trying iterate through the data(elevation) from .hgt file. I have attached the codes which i used to get the elevation from the file. from gmalthgtparser import HgtParser hgt_file='N09E076....
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1answer
154 views

How would I have an improper DMS value input return a message to the user in a Python 3 function? [closed]

My question is about input functions in python 3 specifically for a latitude conversion function from dms to dd. I'm new to python3 and having some trouble understanding how I would allow a user to ...
3
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1answer
571 views

How to move a layer position on the layers order

I am looking for a way of moving a layer to the top of the layer order once another layer is loaded. Using the following code extracted from this answer I get the error: AttributeError: '...
1
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1answer
245 views

Question about running python in QGIS3

I have 5 python scripts in the following folders : .\Signal_Slot_Example\main.py .\Signal_Slot_Example\ProgressDialog\init.py .\Signal_Slot_Example\ProgressDialog\Progress.py .\Signal_Slot_Example\...
0
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1answer
2k views

Smoothing shapefiles using Python

The purple is the original polygon to be smoothed and I would like to smooth the polygons as the red line using Python. I tried simplify but looks like I need a buffer and simplify the buffer. But I ...
0
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0answers
26 views

Writing and testing python code using existing OSGeo4W Python3 install?

Looking for a development environment, like idle, for Python 3.6.1 that I can install and use with my existing python3 installation from the OSGeo4W. I am trying to learn python for use with QGIS and ...
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0answers
54 views

gdalinfo --formats return different values in python3 than in OSGeo4W

I am working whit geopdf to obtain the layers. When I use driver = ogr.GetDriverByName('PDF') it return None, and obviously I can't open it. I have checked with the command gdalinfo --formats and it ...
5
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2answers
378 views

MessageLevel in QGIS3

I am trying to migrate a plugin to QGIS3 from QGIS2 and I am having issues with an API. The original python has QgsMessageBar.MessageLevel but https://qgis.org/api/api_break.html says it has been ...
1
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1answer
649 views

Open Data Cube how to continue after the creation of the database?

I have some questions about using Open Data Cube. First of all I have successfully installed the virtual environment with miniconda and the database with PostgreSQLPortable-10.1.1. Now I have already ...
1
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2answers
364 views

Automating calculation of NDVI with rasterio?

I want to automate this code below for other 99 images, the problem that I have is that each image is in its specific folder as it's mentioned in the picture below. the images are very big and I want ...
1
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2answers
101 views

Add Path to JPGs in Attribute Table based on Unique ID

I've been tasked with updating attribute table fields with file paths to image files in a folder based on a unique ID. I'm having trouble thinking up a script that will do this? I'm working on a ...
0
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1answer
357 views

How can I run an ArcPy Python Toolbox from Python3-shell?

I am trying to port an arcpy python toolbox from ArcMap to ArcGIS Pro. In ArcMap I had to use the 64-Bit-geoprocessing tool because of the size of the datasets, so I wrote a wrapper-Script for the ...
0
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1answer
102 views

How to read ALOS PALSAR data using gdal

I have downloaded ALOS-1 PALSAR level 1.0 data from data archive from Alaska Satellite Facility. After unzipping files ,I am getting image files,Leader Files,Trailer File and Volume File. All the ...
2
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0answers
143 views

Identify partial intersections between a polygon layer and a line layer using PyQGIS

I have a drains layer (polygon) around which I have created buffers of varying distances. I want to find the intersection between the different buffer layers and pipes (line) layer and accordingly ...
0
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1answer
648 views

Why does the output of gdal.RasterizeLayer differ from gdal_rasterize?

Problem I've recently noticed that the output from the gdal.RasterizeLayer function differs from the result I'm getting using the gdal_rasterize utility. I have geotiff of a SAR product that has ...
1
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0answers
205 views

Converting QGIS2 Plugins to QGIS3

I am trying to convert a QGIS2 Plugin to QGIS3; specifically the Quickfinder plugin (I am aware of QGIS3 Locator and no I do not feel it provides the same or similar capability just thought I would ...
2
votes
1answer
118 views

QGIS plugin: set the position of the featureForm

Im developing QGIS plugin (Python3) to open the featureForm (depending on some of my conditions (matching geometries,...))I use this code: layer = self.iface.activeLayer() ...
3
votes
1answer
2k views

Write a Spatial Join output to a CSV?

I am trying this example with different input files. My aim is to merge the country and point tables into one table using sjoin from geopandas and write to a CSV file. I took a look at 1. When I run ...
4
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2answers
702 views

Bug using Python 3.7 (from QGIS) and trying to install package with pip

I use QGIS 3.6 and Python 3.7 and I try to install a package with pip in command line tool under Windows 7 but I have the following message : Fatal Python error: initfsencoding: unable to load the ...
0
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0answers
892 views

Visualize big data HTML file created with Folium

I have written a Folium map of a French city with the possibility of visualizing attributes information on click for each of its polygon which makes a huge file after 2 hours of calculation with the ...
0
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0answers
298 views

Loading spatialite with python3's module under Windows

I installed spatialite's Python module using pip: pip install spatialite I copied the mod_spatialite.dll found on https://www.gaia-gis.it/gaia-sins/index.html into my windows/system32 folder (I have ...
1
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0answers
195 views

QGIS plugin + project: Enter db credentials(password and username) programmatically

I am developing QGIS Python plugin. I have a QGIS project and layers stored in a PostGIS database. I don't want to store the password into the project and I want to avoid that user need to type ...
1
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0answers
940 views

How to insert a Polygon into MySQL database Table?

I have shapefiles which I converted to .csv format. I want to insert those into a MySQL Database table. I used ST_PolyFromText according to the MySQL reference manual. ## create table cur.execute("...
0
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0answers
210 views

Problems with GeoServer REST API via Python and text encoding

I have checked a few other threads talking about GeoServer REST API and encoding, but nothing seemed to work. I have a dataset already uploaded into GeoServer and now I just want to update some of ...
1
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1answer
1k views

Enabling Jupyter nbextension for ipyleaflet?

I was trying to test out this script https://github.com/tylere/PyDataNYC2017/blob/master/ipynb/satellite_analysis.ipynb but got stuck at the iteractive mapping part. import ipyleaflet map1 = ...
0
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1answer
600 views

Search plugin of Folium doesn't appear [closed]

I'm trying to reproduce the following jupyter notebook : https://nbviewer.jupyter.org/github/jtbaker/folium/blob/geojsonmarker/examples/plugin-Search.ipynb But once I'm trying to create the map I ...
2
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4answers
7k views

Click event on maps with Folium and information retrieval

I was wondering if there is a way in Folium to get the information on an entity we click on with Folium? I'd like the map to either open a tab with the attribute information or just send back ...
1
vote
1answer
186 views

Can't get the correct geometry values after MySQL querying

I have large points data and also a small bounding boxes. I want all the points present within this bounding boxes. With the extent of the bbox , I want to get all the points within this bbox. With ...
1
vote
1answer
1k views

QGIS 3 - QSettings().value(r“[…]”)[0:2] error - 'NoneType' object is not subscriptable

I'm trying to find a solution to launch a plugin from outside the QGIS console I've succeeded to call the plugin from the python console in the QGIS software but I'm now trying to do it outside of ...
1
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0answers
195 views

Launch a QGIS plugin from a batchfile

After having built a QGIS 3 plugin, I'd like to know how could I call my plugin without clicking on the plugin bar of QGIS to launch it. I've tried implement a first batch file for it : REM changer ...
1
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0answers
631 views

Shapely : cascaded_union seems to return too many polygons

I'm trying to get the union of around 4,000 polygons using Shapely's cascaded_union function. The output of this function is a multipolygon in my case, which is normal since many input polygons do not ...
1
vote
1answer
431 views

Deprecation warning when importing Processing in pyQGIS 3

I use QGIS 3.4 with Python 3.7 and I have a warning message when importing Processing like this : import processing from processing.core.Processing import Processing Here is the message : Using or ...
1
vote
1answer
254 views

Setting selection border color in red and save the map of the resulting selection

I'm attempting to create a plugin in QGIS 3 in order to zoom on a selected feature and get the map picture exported in .jpg format. I've been able to perform the zoom and selection of my selection, ...
1
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2answers
3k views

Create Polygon with Length, Width, and a center coordinate

Using Shapely or like library, How can I create a rectangular polygon with known Length, Width (in meters)(Drawing over EPSG: 3857), and center coordinates (EPSG: 4326)? The output needs to be in ...
1
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0answers
101 views

How to set project CRS with plugin (sqlite layer)?

I'm loading a sqlite db into the current project of qgis with a plugin. The standard CRS is EPSG:4326, however i want the canvas to be set at EPSG:3857. When running one of the 2 codes in the console,...
2
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0answers
3k views

How to prevent “Type error: unhashable type” while writing properties with Fiona?

Using shapely's dissolve method I created new geometries from two existing shapefiles. Now I would like to save those new geometries and their properties with Fiona. I have tried to write the ...