Questions tagged [python]
Python is an open source interpreted programming language used in many GIS programs.
11,014
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GeoPandas installation problems
I wanted to install GeoPandas, but I end up getting only this. (conda install geopandas)
I also tried the other methods (https://geopandas.org/en/stable/getting_started/install.html), but doesn't ...
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Convert Access DB columns from Irish Grid X,Y to ITM X,Y
I have an access db file which contains 2 million records.
I have written the below Python script to convert the relevant columns to the required CRS for consistency in the database.
import geopandas ...
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1
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17
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How do I open certain window from raster file
I have a geodataframe with some bounds and I'd like to open that specifc box from the raster file. Lets say my raster file is name data.tiff so my current code is like:
import rasterio as rio
from ...
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26
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How to ignore -3.4028235e+38 as a minimum value in a DEM?
I am working with a DEM with the range of 99.93-169.32 (This range can be seen in QGIS). I am trying to open this DEM using cv2 or rasterio in python, and after that apply some filtering methods to ...
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GeoPandas doesn't read FID column from geopackage
I'm trying to open a geopackage with GeoPandas. From QGIS I can see three columns into FAT as you can see below:
I expect to see the same columns when I open these data with GeoPandas, but is not so.
...
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Scipy Error for SCP
Semi-Automatic Classification Plugin: Error. Check Python Scipy installation for the Semi-Automatic Classification Plugin.
How do l go about it?
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2
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34
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Join multiple geospatial polygons to their nearest lat/long point in a different table using GeoPandas or other Python tool
I've got a list of voting precinct geospatial polygons that need to join to a different table with just lat/long points for each zip code. How can I join each of the precinct polygons to its nearest ...
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3D terrain in Mapbox using Python
I am connecting my Dash output to a custom-styled mapbox style. In my custom mapbox style, I have enabled 3D terrain which gives super cool insights and it allows you to tilt the map so that you can ...
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How to learn Python and Arcpy(ArcGIS Pro) from knowing nothing in a clear and efficient way? [closed]
I am a complete new to Python and Arcpy.
I have learned some knowledge about R before,such as raster and terra packages but now I think learning Python is much more difficult than learning R. And I ...
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Converting working ModelBuilder to Python script reports errors in ArcGIS Pro
I want to learn Python and ArcPy by converting ModelBuilder to Python script.
First, I tried to use 'extract by mask' in this way.But it failed.
# -*- coding: utf-8 -*-
"""
...
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23
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Combine two raster datasets from different areas - xarray
I simply wish to combine two raster datasets from different spatial extents and with different coordinate reference systems using python. Eventually, I wish to combine enumerable datasets, but ...
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17
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Extrapolate URI from a WFS connection
Purpose: to create and add a vector layer instance to the project with Python
This is what is written in https://docs.qgis.org/3.22/en/docs/pyqgis_developer_cookbook/loadlayer.html#id1 to connect with ...
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15
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Mask NetCDF file data with multiple variables from shapefile in Python
Most of the solutions to this I've seen online only work on 3-D time series data, but my NetCDF files has more than one variable.
It has a data variable named Albedo and I need to plot it using a ...
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26
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Checking intersection between polygon and geometry in GeoJSON
I have a GeoJSON file with different geometries(polygons). I'd like to find if my polygon intersects with any of the file's geometry.
I am not going to paste the file here as it is a long one, but can ...
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Plot graph as subplots for multiple csv files [closed]
I have multiple CSV files. All contains the same columns. Column's names are Date and Value. Now I want to plot graphs for each different CSV and as different subplots and want to save them in png ...
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Coinciding circle fills on Folium
I am trying to combine two circles to get something like this from here.
However, I couldn't convert the solution in this post to Python. I need these circles to behave almost like one, but cannot ...
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no feature ID when polygonizing raster with python GDAL
I'm trying to polygonize the following binary raster:
The output is a polygon layer (ESRI shapefile) that looks good, however, doesn't have FIDs for the features and thus I am not able to iterate ...
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Geopandas - Create all lines between two point shapefiles
I have two point shapefiles A (say, 10 points) and B (say, 30 points). I would like to create a shapefile with the lines between all points in A and all points in B (so, 300 lines). I have not found ...
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Difference in implementation of ee.Image.getMapId and Export.map.toCloudStorage for float casting
Background
The following code:
image_collection = ee.ImageCollection("COPERNICUS/S2_SR_HARMONIZED")
filtered_collection = image_collection.filterDate('2022-01-01', '2022-02-01').filterBounds(...
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38
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Insert x number of vertices on a Polyline with field calculator or Python?
I've seen Adding vertex set distance from first or last vertex in polyline? which is similar to what I am trying to do, except instead of inserting one vertex a distance from the start point and all, ...
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Landsat 8 Collection 2 cloud-free mosaics in Earth Engine
I am trying to get cloud-free mosaics from 6-months periods of Landsat 8 Collection 2 Surface Reflectance.
So far I've used geetools. My code consists of multiple modules so I can't paste it all here, ...
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28
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Set-Operations with Overlay when columns match
Lets go with the example at the geopandas Documentation. Say we have:
from shapely.geometry import Polygon
polys1 = gpd.GeoSeries([Polygon([(0,0), (2,0), (2,2), (0,2)]),Polygon([(2,2), (4,2), (4,4), (...
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1
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23
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Combining data from multiple continuous rasters in ArcGIS [closed]
I am new to using rasters and have encountered a scenario for which there is hopefully an easy solution.
I have 4 different continuous rasters that each represent the density of different habitats ...
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32
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Bringing PyQGIS and PyQt into already settled Anaconda Python environment in PyCharm
I have Anaconda Python environment with different packages required for developing a QGIS plugin (including the Plugin Builder Tool etc.).
(qgsdata) C:\TempDaten\_dev\QgsData>conda info
...
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geopandas add legend to simple plot with no columns
I have a single feature that I want to plot with a legend, but the legend is not showing off. It's a simple polygon with simple fill.
The code that I ran is like this,
import geopandas as gpd
import ...
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17
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Creating MBTiles from GeoTiff raster with transparent background and all the zoom levels
I am trying to create MBTiles from GeoTIFF rasters that have a black background (RGB: 0,0,0).
In QGIS, I am able to generate MBTiles via the following steps:
Set Transparency pixel (0 0 0) to get a ...
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14
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Using Processing Algorithm script QGIS3 outside GUI [duplicate]
I get an error when I try to use a Python script using processing algorithms.
If I use the following script, the program will encounter an error. So there is no processing.
import processing
...
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29
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Error in Rbindlist from a rasterstack and shapefile extraction file
I have multiple rasters files and a grid shapefile.
I load the shapefile:
grid = st_read('/grid.shp')
I load the raster and create a raster stack
`path <- "/VI_tif"` #folder where I ...
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21
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Spatial join for checking whether a coordinate lies within a shape polygon
I've a database of coordinates that records lat,lon values in 2 separate columns as double.
I'm trying to map these points to polygons within my shapefile using geopandas spatial join, but I keep ...
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1
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51
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Distance between polygons and points in GeoPandas
I have a main polygon of polygons that have areas mapped out on a map
and a bunch of points such as sample below
NAME lt ln
1 12.9336806 77.6122669
2 12.974768 77.767745
...
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28
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Calculating terrain slope
Having a set of elevation measurements along with coordinates, I am looking for a way to calculate the slope (the main goal is to determine the locations where the precipitation water might be ...
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Should I calculate my terrain attributes before or after upscaling my DEM
This is more of a theory question. I am working on a project that requires the use of topography data, I have a 1KM resolution global DEM to which I will be using GDAL to calculate general topography ...
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48
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Specifying target resolution when resampling with rasterio
In GDAL warp you can simply set an xRes and yRes value. I'm trying to only use rasterio, but the process seems a lot less clear.
According to the docs https://rasterio.readthedocs.io/en/latest/topics/...
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37
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An example for Viewshed analysis in Python
My goal: Using a .TIF DEM, I would like to conduct a viewshed analysis. This is to be used as one feature for a larger program written in Python that will significantly improve work quality in my ...
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Color polygon based on points' values (geodataframe column)
I'm having a hard time trying to figure out a way to add a heatmap-like effect to my Polygon object based on the values of the Points inside of it.
My geodataframe is as follows:
inv ...
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32
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Feature/shapefile does not show up in Python
This is the code I have
fname = r"C:\Users\Kevin Abbot\Documents\W&OD Trail.shp"
shape_feature = ShapelyFeature(Reader(fname).geometries(),
ccrs....
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22
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How to correctly/efficiently store Sentintel-2 imagery with 100 x 100 km dimension?
I am trying to store 100x100 km Sentinel-2 tile imagery into the PostgreSQL table.
I have only these bands: B2, B3, B4, B8, and B11, resulting in a 2.5 GB GeoTIFF file. Consequently, due to the large ...
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Matplotlib: Giving arbitrary X,Y (Cartesian Coordinates) data a spatial reference of my choosing over a basemap
I'm attempting to overlay my animation over a projected basemap in Matplotlib. Right now I have a animation that is displaying an array in a time series over an X and Y axis in Matplotlib. What I want ...
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Create lat-lon mesh grid from MODIS HDF4 file GDAL
I have a Python code that reads HDF4 files for different satellite products. I am having issues obtaining the underlying grid that it uses.
In panoply I can see the variables XDim and YDim that have ...
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How to detect curves and straight paths using GPS coordinates?
I'm working on a project involving railway tracks and I'm trying to find an algorithm that could detect curves(left/right) or straight lines based on time-series GPS coordinates.
The data contains ...
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How to fix "Import ArcPy" glitch in ArcMap?
I just got this problem where my screen in ArcMap has this constant "import arcpy" phrase in the middle of it. It happened after I ran a Python script, but I deleted everything related to it ...
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Find the average of pairs with the same first element in FME
I have a list of pairs in FME:
and need to calculate the average of each set of pairs with the same first element.
I came up with this code, but it takes a lot of time to paste and copy the list. Is ...
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27
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Understanding TIFF file georeferencing
I am new to maps and ArcGIS field, and having some issues understanding the used georeferencing systems, I have a dem.tif file, when extracting information I get X and Y in very large number, I used ...
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Creating custom processing tool (sibling of Batch Nominatim geocoder) in QGIS
I want to create a custom processing tool for geocoding in QGIS.
It will reproduce the "Batch Nominatim geocoder" geoalgorithm, besides several things:
another URL of a geocoder will be ...
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Querying Date Range and Feature Service ID in gis.content.search
I am trying to use Python to export data from ArcGIS Online within a specific date range while also using a specific feature service.
I have been able to get this to work successfully:
num_items = 3
...
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2
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169
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Comparing two sequential values in order to do an operation within sequence in another field
I have a shapefile representing points along a line. I have the downstream distance of each point on their respective line. What I would like to do is sequence the two fields in the attribute table ...
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Why does my code produce a runtime error?
My code produces a runtime error and I don't know what I'm doing wrong.
... import arcpy
... from arcpy import env
... from arcpy.sa import *
...
... #set the workspace environment
... env.workspace =...
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Extract shapes and shape data from GeoTIFF using Rasterio and store as GeoJSON
I have a GeoTIFF that has a black background and shapes using various colours and each point has a data value. I'm trying to use rasterIO to extract this GeoTIFF into a GeoJSON so it can be displayed ...
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39
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Using Python to plot flight data over portion of US?
Question
I have a dataset in Python that tracks the flightpath of an object. I know the minimum and maximum latitude and longitude of the flightpath. The flightpath is entirely over the Montana.
Is ...
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1
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Process for Determining Accuracy of Polygon [closed]
What tools/processing/decision trees would one use to get a base line of the accuracy of a polygon? I'll explain below.
In my line of work, I deal with buffered lines (polygons) and I'd like to create ...
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