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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23
votes
4answers
15k views

Using OSGeo4W shell with Python 3

I would like to use OSGeo4W shell with Python 3 but when typing python3 I get the following error: Fatal Python error: Py_Initialize: unable to load the file system codec File "C:\OSGEO4~1\apps\...
14
votes
4answers
10k views

Installing external python packages for QGIS 3?

While there are tools and methods for QGIS 2 I cannot figure out for 3 I want to install external Python packages such as sqlalchemy etc. I tried the following things : Tried to download osgeo4w for ...
13
votes
4answers
13k views

Will ArcGIS Desktop support latest Python 2.x or Python 3.x versions?

I'm curious to know whether ArcGIS Desktop 10.0 will support newer versions of Python than 2.6. And for that matter newer versions of NumPy (ie, 1.4, 1.5 etc). I'm sure that this documentation is on ...
10
votes
2answers
1k views

What's the difference between QgsPoint, QgsPointXY and QgsGeometry.fromPointXY(QgsPointXY()) in PyQGIS?

I am using PyQGIS. What is the difference between QgsGeometry.fromPointXY(QgsPointXY(x,y)), QgsPointXY(x,y) and QgsPoint(x,y)? When I print these 3 options, I get: print( QgsGeometry.fromPointXY(...
10
votes
2answers
7k views

Using Python 3.x in ArcGIS?

I've been reading the "Whats New in ArcGIS" for the ArcGIS 10.3 update and came across the Python and ArcPy portion. It states that: ArcGIS 10.3 has been upgraded to include Python 2.7.8. Now ...
9
votes
3answers
3k views

Distinguishing Python version when using IDLE with ArcGIS Pro and ArcGIS 10.x for Desktop architecture?

I have just started to work with Python 3.4.1 which comes with ArcGIS Pro 1.0.0, on my laptop, which also has Python 2.7.8 which comes with ArcGIS 10.3 for Desktop installed, and I would like to ...
8
votes
1answer
1k views

Differences between OSGEO GDAL and GDAL python bindings?

Question I'm trying to figure what are the differences, and of course, what is the best solution to use, between two python3 bindings: GDAL, imported as import gdal OSGEO.GDAL, imported as ...
8
votes
3answers
8k views

Where can I find GDAL Python bindings for Python 3.4?

I am using python 3.4 for development and I need GDAL python bindings for python 3.4. I have already gone through this site, but I can only find up to python 3.3?
7
votes
1answer
364 views

Get xy coordinates of QgsMapCanvas in PyQGIS 3?

I am trying to get the QgsMapCanvas coordinates when they change using PyQt5 and PyQGIS 3. What I have used for that: self.canvas.scaleChanged.connect(lambda: self.showScale(self.canvas.scale())) ...
6
votes
4answers
20k views

Is there Python 3 module to read .dbf files written by ArcGIS for Desktop?

I would like to know whether there are Python 3.x-compatible (preferably Python 3.3) modules to read the kind of .dbf files produced by ArcGIS for Desktop. All the modules I found were only ...
6
votes
2answers
4k views

Python 3 support in QGIS?

As python3 is getting standard more and more I wonder wether there is or will be support for python 3 in QGIS?
6
votes
1answer
644 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 ...
6
votes
4answers
9k views

How to (re)install gdal in python3 (mac)?

I am stuck trying to install gdal, running python3.6 on a Mac. When I run pip install gdal I get errors of Failed building wheel for gdal error: command 'gcc' failed with exit status 1 Command "/...
6
votes
1answer
2k views

Getting log error about default locale settings when using GRASS with QGIS?

I downloaded python 3.6, installed it, dowloaded QGIS 3.0.2, installed GDAL, then QGIS, then opened QGIS and tried to use GRASS processing tools. Initially I got the following error: env: python3: No ...
5
votes
1answer
5k views

Getting bounding box from Point type GeoDataFrame to getting data from Osmnx

I've a point geodataframe which has only point features inside of it. fishnet_Id ... geometry 0 0 ... POINT (403486 4540640) 1 ...
5
votes
2answers
5k views

Starting Python Shell Window of IDLE for use with ArcGIS Pro?

Prior to installing ArcGIS Pro 1.3 (I am now at 1.3.1), on Windows 7 SP1, I have been starting IDLE in a Python Shell Window from the Windows Start Menu using IDLE (Python GUI) in the Python 3.4 ...
5
votes
2answers
1k views

Python 3 with QGIS on Mac?

I need to start learning Python, and I want to learn with version 3.x. I understand that QGIS--at least some plug-ins--relies on Python and Tcl/Tk, and probably on specific versions. Assuming that ...
5
votes
6answers
10k views

Ipyleaflet map object doesn't display in Jupyter Notebook but it gets created

When running the code from the example (https://ipyleaflet.readthedocs.io/en/latest/api_reference/map.html#example), no map get displayed. from ipyleaflet import Map, basemaps, basemap_to_tiles m = ...
5
votes
2answers
20k views

Fill color not showing appropriately in folium?

The following code should have shown different colored circles in a map. But my result was circles with no color at all. import folium import pandas data=pandas.read_csv("Volcanoes.txt") lat = list(...
5
votes
2answers
431 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 ...
5
votes
4answers
6k views

Using PyScripter with ArcGIS for Desktop?

Can someone please let me know how I can set the PyScripter 2.5.3.0 x64 works with Python 2.7.3 which comes with ArcGIS what I did was: I installed the ArcGIS 10.2 I installed PyScripter 2.5.3.0 x64 ...
5
votes
1answer
86 views

Difference between LINESTRING((x1 x2), (x3 x4), (x5 x6), (x7 x8)) and LineString([(x1,x2), (x3,x4), (x5,x6), (x7,x8)])

I am a little confused about how objects are being defined and represented and mostly because some of the solutions I find for solving issues I have demand that the input data be in an other form than ...
5
votes
1answer
2k views

How to let ogr/gdal CreateLayer() create a `geom` field instead of `wkb_geometry`?

When creating a new table (PostGIS) using OGR/GDAL (2.1+), is there a way to select a specific name for the geometry field (such as geom), rather than using the default name? I created a new table ...
5
votes
1answer
1k views

Sending arguments to LAStools function from Python script not working

I`m trying to call the lasground module from a python script, using this method: args=['lasground', '-i *.las', output_file, arg_step, arg_spike, arg_spikedown, arg_offset, arg_bulge, arg_cores] proc=...
5
votes
1answer
2k views

pyQGIS returns invalid layer with QgsVectorLayer in QGIS 3

I have the following problem : I've installed all pyQGIS environment on Windows 7. I work with 64 bits version of Python 3.6 and QGIS 3.0 and PyQt5. My Windows paths are ok. My objective is to create ...
5
votes
1answer
364 views

Make ST_Polygonize in Postgis return dangles, cuts and invalid rings

Postgis allows using ST_Polygonize() from GEOS to make polygons out of lines. I have seen the same function available in Shapely library for Python, but in Shapely, the other method named ...
4
votes
1answer
108 views

Split the column into several and unpivot the columns

I currently have 2 columns NOM_CONCAT and Number of concat(COUNT_RSF_) which is composed of" concat "from 0 to 5 A1, B1, C1 ... A2 A3, B3 . . My goal and to separate the column ...
4
votes
4answers
11k 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 ...
4
votes
1answer
130 views

Why does osr.SpatialReference return different values in python2 and 3?

Can somebody explain why the result of osr.SpatialReference() differ between Python 2 and 3? sr = osr.SpatialReference() sr.SetFromUserInput('EPSG:28992') sr.ExportToProj4() In Python 2.7 this gives ...
4
votes
2answers
806 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 ...
4
votes
1answer
1k views

Polygon from QgsPoints - QGIS 3.8 python

I'm trying to create a polygon layer from 4 points that I have already defined. There issue here is that I'm always getting the following error: AttributeError: type object 'QgsGeometry' has no ...
4
votes
1answer
3k views

Using output statistics in ArcGIS REST API query?

I am using an API to pull in some Web Mapping Service Layer data to my script. The API query has a max count limit of 1000 on returned features per request. There are 2 attributes I am trying to use ...
4
votes
1answer
204 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 ...
4
votes
1answer
3k 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
votes
1answer
7k views

Zonal Statistics of a polygon and assigning mean value to the polygon [closed]

I have a large shapefile filled with polygons, and a raster of that same area. I need to use Zonal statistics to find the mean value of the area under each polygon and then assign that value to the ...
4
votes
1answer
1k views

Creating a Line feature in PyQGIS QGIS 3.x

In QGIS GUI, a line feature is created from this icon 1.jpg How to Create a line with a fixed distance from a vector layer in python console. This my example: from qgis.core import * from qgis....
4
votes
1answer
484 views

Weird schema lock issue

I wrote a Python script that produces several output features layers in separate .gdb's. As I am testing and modifying my code, I generally go into arcCatalog, find the .gdb under which the feature ...
4
votes
1answer
3k views

Calculating the Area by Square Feet with Geopandas

I have a geodataframe that has no assigned crs. I want to create a column/field called 'area' that has the area calculated as square feet, not meters or km, using geopandas. Note: this geodataframe ...
4
votes
0answers
43 views

Preserving provider of original raster layer when it is modified for another resulting raster layer?

A while ago, I asked for a method to assign new QgsRasterBlock objects to a QgsRasterDataProvider objects at Assign new QgsRasterBlock object to a QgsRasterDataProvider object. The reason was for ...
4
votes
2answers
548 views

PyQGIS standalone script using QGIS 3.2

I want to work with PyQGIS Python 3 using QGIS 3.2 standalone install. I created a simple batch file to work with PyQGIS but I have some errors. Here's the batch file: @echo off SET OSGEO4W_ROOT=C:\...
3
votes
2answers
12k views

Python shapely intersection with buffer in meter

Having a line and a polygon, I use shapely to determine the intersection between the two with a defined buffer. Both the line and the polygon are in WGS84 coordinates, while the buffer is in meter. ...
3
votes
2answers
8k views

Visualizing GPS points on interactive map [closed]

I am using version 3.0 of python, I want to visualize GPS points in my dataset on interactive map. Is there any python library that can help me to visualize my data on maps. The input dataset in ...
3
votes
1answer
4k views

Merging a geodataframe and pandas dataframe based on a column

I have a simple geopandas dataframe that includes geometry and a column called 'MUKEY': merged_spatial_df.head() I want to merge it to a tabular (.csv) pandas dataframe (which also has a column ...
3
votes
1answer
1k views

Using shapely interpolate to evenly re-sample points on a linestring geodataframe at specified interval

I have a GeoPandas LineString GeoDataFrame. I am trying to evenly interpolate the spacing of the nodes that make up each line, with a couple constraints: keep endpoints unchanged, and specify maximum ...
3
votes
1answer
762 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: '...
3
votes
1answer
586 views

pyqgis create layer from a list of points

I am working with pyqgis in QGIS3 and i want to create a point layer from an intersection beetween a point and a polygon layer. I can identify wich points intersects my polygon layer but i can't use ...
3
votes
1answer
113 views

QGIS 3.8 Python merge files

For a merge operation I need a list of all my layers in the TOC with path and filename. How can I achieve that? layers = QgsProject.instance().mapLayers() # dictionary myLyrList[] for layer in layers....
3
votes
2answers
362 views

Launch QGIS GUI using batch file and Python 3 - Windows 10

Ultimately I'm attempting to launch the QGIS GUI and run a python script from a batch file. I've reviewed numerous instances referencing similar scenarios on this and other forums but for the life of ...
3
votes
1answer
2k views

Getting error while importing GeoPandas in Python console

I have installed GeoPandas and its dependencies using pip install package_name. Here is the pip list output: Package Version attrs 18.2.0 Click 7.0 click-plugins 1....
3
votes
1answer
192 views

QGIS development version(2.99) and python api questions

Can I use QGIS 2.99 PyQGIS in standalone apps like the others QGIS version? Do I need python 3.6 to use this python api?

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