Questions tagged [pysal]
PySAL is an open source library of spatial analysis functions written in Python.
34 questions
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Compute Moran's I on more than one attribute
I am trying to compute global Moran's I to check for spatial autocorrelation among areas of a city. I am using python, in particular geopandas and pysal.
My geodataframe looks like:
District_name|...
3
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1
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289
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Merging small polygons with neighbor polygons using GeoPandas and PySAL
I want to merge small polygons based on their area, etc. with adjacent neighbor polygons. For instance, we want to merge all countries in an iterative way to have a world map in which all small ...
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Is it possible to compute higher order queens contiguity in PySAL?
I'm computing a spatial weights matrix in PySAL using Queens Contiguity. My problem is that I would like to consider areas that are contiguous to the first set of neighbours (ie. 2nd or even 3rd order ...
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2
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Moran's I on 2D arrays/rasters?
I would like to apply Moran's I spatial auto-correlation measure to 2D arrays or raster files in Python and I am wondering if there is an available implementation for it.
I know Pysal offers an ...
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Read shapefile into pysal [closed]
I've found the following Python module to work out the Mean Nearest Neighbor Distance Statistics of points
https://pysal.org/notebooks/explore/pointpats/distance_statistics.html
I've successfully ...
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interpretation of Global Moran I values using pysal
I'm using pysal library (and this specific notebook) to run spatial autocorrelation.
I have question regard the MORAN I value that I recieve.
As far as I understand, in order to be able to say ...
CommunityBot
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1
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Python equivalent of spatstat's spatial point process functions
Is there a free Python package (i.e. PySAL?) that implements the standard summary statistics for spatial point processes, e.g. the F, G, J, and K functions?
I'm happy to use R (i.e. spatstat) if that'...
CommunityBot
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Getis-Ord Gi* (arcgis 'hotspot analysis') with python? [closed]
Is it possible to compute Getis-Ord Gi* statistics (referred to as hotspot analysis in arcgis) with a Python library?
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Make probabilities with geospatial data
I work on a particular area, my data are geospatial types and are stored in a geodataframe which contains:
a structure column (house, building, town hall, store etc).
a neighbors_structure column ...
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Python implementation to generate Delaunay triangulation based spatial weight matrix [closed]
I'm looking for Python implementation for Delaunay triangulation based spatial weights.
There are a lot of spatial weights techniques available in a Python geospatial library PySAL but Delaunay ...
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PySAL, ValueError: cannot assign slice from input of different size
I want to calculate local moran's I statistics using pysal with Queen contiguity but I'm getting error.
import geopandas as gpd
from pysal.explore import esda
from pysal.lib import ...
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298
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How to interpret spatial random permutations against the observed value of the statistic (PySAL)
I have a map for which I calculate the value of the Global Moran's I. With the use of PySAL, there is also an option to do a computational inference. The result of such analysis is shown below.
From ...
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"PySAL"python qgis says --- is not recognised as an internal or external command
while loading hotspot analysis, it gives following 2 error
1. Couldn't load plugin 'HotspotAnalysis' due to an error when calling its classFactory() method
2. ModuleNotFoundError: No module named '...
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Using PySAL to perform Hot/Cold Spots
So I am trying to figure out how to understand the Getis Ord results from pysal.
I have a geographically enabled datatframe, and I want to figure out how to find both hot and cold spots from the ...
CommunityBot
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3
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0
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474
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Find spatial and temporal variability from a GeoPandas dataframe of polygons
I have a geopandas dataframe of polygons (all rectangles ~100mx120m) and each of these polygons has an attribute for time and % ice coverage. This is all derived from imagery I collected in the ...
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PySAL reading DBF column as None
I'm reading a Shapefile with PySAL in order to do some anlysis. The shapefile's DBF contains three columns, "id", "count" and "population". All three are large integers with no Null values.
I try to ...
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Using Single Polygon for entire dataframe in PySAL?
I'm trying to calculate the queen contiguity weights using pysal's queen_from_shapefile() helper method based on this page
Not being a GIS specialist I wanted to check my intuition on this Q&A ...
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1
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411
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Fixing colors of LISA Cluster maps from Pysal?
I am using the LISA Cluster package from Pysal to create a LISA (Local Indicator of Spatial Autocorrelation) map.
As the example of the documentation shows, the color lightblue is used to identify ...
- 27k
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1
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Adding python module to QGIS python interpreter on mac?
I'm on OS X El Capitan running QGIS version 2.18.2 which I installed via the Kyngchaos installers.
I'm trying to install a plugin, which requires, among other things, that Pysal needs to be installed....
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QGIS3.8 Hotspot Analysis Plugin not installing
I'm hoping someone on here might be able to help me. I'm fairly new to working with QGIS I'm completely lost. For my PhD project I have to use QGIS to produce georeferenced heatmaps based on ...
- 27k
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1
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Using pysal to map location of coordinates?
I am trying to map which county a set of coordinates I have are in. I want the code to go through each coordinate, check which county it is in, and then print the corresponding county. However, ...
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Error while running PySAL SpaceTimeEvents function
I'm new to PySAL and trying to run Knox test to find space-time correlation in my dataset. My original dataset is in the form of csv including attributes such latitude, longitude, date and other ...
CommunityBot
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Find maximum theoretical join count (spatial statistics)
In addition to calculating the joint count statistic, I would like to compare the actual count of joins to the theoretical maximum count of joins. I know how to compute the statistic and find the ...
CommunityBot
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0
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418
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Classify / section line or group of points according to shape (with shapely objects)
Is there any python module/function that classifies/sections a shapely line according to the shape the line forms?
If not, I could do it with the positions of the points that form the line. I would ...
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673
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Hotspot Analysis QGIS Error: An error has occurred while executing Python code: ValueError: Illegal field requested in GetField()
I am doing a hotspot analysis for chicken spatial distribution in QGIS using Ubuntu. I have already installed the repositories used for hotspot analysis. However, an error occurred after I chose a ...
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PySAL natural breaks from Numpy array
I am attempting to extract natural break values from a raster using Python.
The intended process goes: Arcpy raster object to NumPy Array (using RasterToNumPyArray) to natural break values (using ...
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Using R to do logistic geographically weighted regression(GWR) prediction
I'm using the R package "GWmodel" to do the logistic GWR, but this package doesn't provide the prediction function for generalized GWR(Binomial/Poisson). How can I do the Logistic GWR prediction using ...
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Read specific columns shapefile with PySAL
I'm using PySAL for work and I have encounter a problem.
I want to calculate Moran’s I for serval fields, I can open and create a weight matrix from my shapefile (w) however I don't know how to ...
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Spatial weight for PySAL from a geojson file or geodataframe?
I want to calculate the Moran I value of a geojson file through python. Recently I am trying to use pysal and I find that I need to get the a spatial weight to realize it. But from the official guide ...
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Where to find PySAL toolbox for ArcGIS?
I installed PySAL but i can't find the toolbox for ArcGIS.
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How to merge CSV and county shapefile?
I have some data in a CSV file. One of the interested variable is test done (1=done, 2=not done). There is a variable of county name in which I would like to join with a county shapefile.
I only know ...
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PySal and PostGIS (maybe via Shapely). How can these two interact?
I'm trying to learn the use of PySal and Python. As I'm already regular user of PostGIS, I would like to integrate the database as the storage medium for the data to be analysed. I'm using the test ...
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Distance-based spatial weights in pysal
I run into errors with distance-based spatial weights in pysal. When running a spatial lag model (e.g. twosls_sp.GM_Lag), I get the following exception:
Exception: All entries on diagonal must equal ...
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BV LISA using PySal?
I want to run a LISA with a time series spatially lagged variable using PYSAL. I see that LISA will allow the definition of y & w but not Wy(t-k).
Any thoughts how I can get the lagged variable ...
- 65.4k