Questions tagged [interpolation]
The estimation of values at unsampled points based on known values of surrounding points.
877
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Interpolating missing pixels from land cover classification map
On Google Earth Engine, I created a classified land cover map based on a composite of images (spanning 2 years). It's a time series study so increasing the range of images (i.e. increasing to more ...
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TIN Interpolation in QGIS but with a predefined Delaunay triangulation
I have a set of points from which I am trying to perform a TIN triangulation.
However, the algorithm for the triangulation (i.e. the resulting raster) creates triangles that I would like avoid for the ...
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SAGA GIS - regression kriging
I have a problem with regression kriging in SAGA under QGIS. It gives me an error - could not execute the tool. I want to create temperature maps from data set of meteorologic station and DEM.
I have ...
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IDW Interpolation taking hours and hours - is there a better way to configure the settings, or a better solution than the built-in IDW?
I have some USGS LPC data that has 221,593 points, with a basic square shape of 1km x 1km, with the upper left cut away as seen in the pic.
This job took over 50 hours to run "Execution completed ...
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How to use terrain relief data for improving a spatial interpolation of temperatures using R
I am doing a map with the temperature of a region.
I have already done a spatial interpolation of data using the krige function with the daily data of some recorded temperatures from different ...
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Exporting interpolation (IDW,OK,UK…) prediction from gstat in ASCII format
I am trying to export an interpolation (IDW, OK, UK, etc.) prediction generated using the gstat function in the R package. Specifically, I would like to save the resulting map as an ASCII file format ...
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Interpolating TROPOMI Daily SIF_743 and clipping my AOI for time series in Python for my CSV file
I have a csv file that contains extracted TROPOMI SIF L2B variables (delta-time,SIF_743, lat, lon and my calculated Daily SIF_743). Now i want to extract the Daily SIF 743 and plot for lat 31.875,33....
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QGIS Smart Map Plugin - Error Running Interpolation
I am new to using the Smart-Map plugin. I added my data and did the ordinary Kriging interpolation. Just before it reaches 100% I get the following error message:
An error has occurred while executing ...
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Optimize summary stats PostGIS query for multiple polyline layers over a worldwide grid
I have two global PostGIS polyline layers, one of which is a subset of the other. The subset defines where there are issues with the system being mapped.
I am trying to map the likelihood of a ...
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Interpolating a regular lat/lon grid with latitude line at Equator to a shifted grid using Python
I am very new to GIS and have to work with some precipitation data contained in two different datasets with comparable coordinate systems, but differently offset/shifted coordinates:
NASA GPM IMERG ...
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What's the difference between bicubic interpolation and cubic convolution?
Our remote sensing professor recently introduced us to bicubic interpolation and cubic convolution, implying that they're basically the same. Now that I'm studying for the exam, I wonder: Is that ...
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What spatial interpolation is going on with interpolate_pw: population weighted or population-areal weighted?
I think I want to use interpolate_pw from the tidycensus R package to interpolate data from 2000 to 2010 county boundaries. The R documentation describes this as population-weighted interpolation. The ...
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Standard deviation of interpolated data
I have a dataset with air-quality measurements in several points across one state, through several months. Thus, for each point I can calculate average, variance and so. My goal is to interpolate data ...
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Interpolate elevations in QGIS
I'm quite new to QGIS and I have a problem. I have a set of points in CSV format with X,Y,Z coordinates which I want to import in QGIS. Then I have another set of points with X,Y,0 coordinates, which ...
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Spatial Outliers Detection and Remove in R?
I have run my data in R, and created a distribution mapof my data (Clay Soil Property).
I want to detect in a way the spatial outliers that i can see from the map, and remove them in order to execute ...
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Subset a gridded weather data to a list of coordinates
I am very new to working with GIS, and I am trying to get to get a gridded weather data from MetPy interpolate_to_grid function and then subset it to a specific region so I can aggregate the data.
...
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Spatio-temporal Kriging and how extract specific values
I have several years of data that needs to be converted to STDFDF.
Shapiro.test and Adf.test talk about non-stationarity and non-normal distribution.
particolato_May2021 <- read.delim(file = "...
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98
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What is the latest and stable QGIS version support SAGA with Multilevel B-Spline interpolation
I am trying to interpolate elevation points to create a digital elevation model (DEM) on QGIS (v3.22.13). One previous research suggests that Multilevel B-Spline interpolation (MBI) in SAGA is the ...
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TIN-Interpolation always crashing, user error?
Perhaps you can help figure this out, maybe i just overlook something.
So i have a point cloud which a imported from a lidar-data-file (laz).
Now, to generate a raster data set, i planned on using the ...
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Geocoded Points Don't Land Directly On Street
ArcGIS Pro 3.0.2
My street locator includes a street feature class that has streets ranges for the Left and Right side of the street (Left Start, Left End, Right Start, Right End). The street feature ...
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Using gdal to interpolate elevation from a GeoTIFF
I am new to GDAL and am looking for pointers about the Correct™ way to accomplish a few tasks. I would like to do this in Python, not on the command line.
I have a GeoTIFF that shows elevation at 10m ...
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NoData fill QGIS (alternative to nibble tool in ArcGIS)
I have two raster layers - one is a mastergrid, the other shows slope. I want to 'expand' my slope raster so that it covers the same extent as the mastergrid by in some way interpolating the 'missing' ...
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Fill in Basic Colours in Qgis
I'm trying to fill in a TIN interpolation to be a full 1:2 rectangle. When the interpolation is finished, the areas with no land cut off in the corner leaving it transparent, which causes issues for ...
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Interpolation with 10 data points
I have 9 data points showing groundwater level. The points are located in an approximately rectangular grid. The distance between the points is around 200-250 meters. Below you find a map of the ...
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What if there is a site where the rainfall data is 0 with Empirical Bayesian Kriging in ArcGIS Pro
The ESRI official website tells that it is good for precipitation using Logarithmic empirical transformation. But in my 21 sites, some have 0 precipitation, especially in winter.
How can I process it?
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Creating polygons from points using Python [closed]
I have a geopandas geodataframe with the following layout:
Index
Cluster
Geometry
1
0
Point (x,y)
2
2
Point (x,y)
3
4
Point (x,y)
...
...
...
I can directly plot it, but it looks like crap, ...
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Area of extent changes at when cell size increases
I am working with a LiDAR dataset that has been converted from a set of .txt files into an XYZ point feature, and then interpolated using Topo To Raster.
When the cell resolution is set to 1 meter, ...
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Alter cell size of gdal_grid command
I'm using the below command in the GDAL commandline to grid a shapefile using IDW interpolation
gdal_grid -a invdist:power=2.0:smoothing=1.0 -of GTiff C:/users/public/test.shp C:/users/public/test....
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QGIS use a reference layer for IDW interpolation
I am using QGIS SAGA IDW Interpolation tool to interpolate my single-beam data which contains gaps.
I was just wondering is it possible to use a reference layer to help with more 'accurate' ...
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PyKrige interpolation results very different to ArcGIS Pro
I had been using ArcGIS Pro's Kriging tool to apply Ordinary Kriging to my dataset.
This produced the below results, which were exactly as I wanted (I have also included a screenshot of the parameters ...
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Interpolation on grid using QGIS
I am completely new to QGIS.
The problem I have is finding away to interpolate the data on the grid. I'm not sure if you can do it or not.
Can you point me in the right direction?
Data I have at the ...
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PyKrige constantly running into memory errors even with small dataset
I have an xyz file in which I'd like to apply the interpolation method of kriging to via python.
In order to do this, I have come across the module PyKrige and duplicated this example perfectly on my ...
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Using PyKrige for ordinary kriging on an XYZ file
I've previously used ArcGIS for Ordinary Kriging, but I now need a Python alternative.
I found the PyKrige module which i decided to give a try, but I am bit confused by it.
So far, I have read my XYZ ...
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How to perform areal interpolation (spatial downscaling) with Tobler (Pysal package)?
I need to perform a spatial disaggregation of census data. I'm doing it using Pysal's Tobler subpackage, through its model based function, which is a Generalized Linear Model (GLM). I have a original ...
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How to interpolate a point between two points in Oracle
I have an Oracle database table which stores points of a track of moving objects.
object_id
geometry
timestamp
1
...
1970-01-01T00:01:00
1
...
1970-01-01T00:02:00
1
...
1970-01-01T00:03:00
2
...
...
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GDAL GRID Linear Interpolation Creating a Non Continuous Raster
I am using the GDAL GRID algorithm to create a raster from points using the Linear method. The points I have are generated from the river cross-section lines, and all have the same z value per line. I ...
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Kriging Interpolation in ArcMap
I want to interpolate one field of the shapefile named 'Interpolation' by Kriging method. But want to change the processing environment to the extent of another file namely 'Polygon'.
I tried '...
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Save scipy interpolations as a raster (GeoTIFF) format using Python
I am using scipy.interpolate (Python 3.9) to interpolate some data. However, after using a nearest neighbor interpolator, I need to save it as a raster (GeoTIFF) image, preserving the resolution of 0....
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60
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Natural Neighbour Tool not working - Error not specified in Log
I am attempting to use the Natural Neighbour tool to interpolate polar gridded points. I am using "SAGA Next Gen"'s tool since SAGA is apparently incompatible with QGIS versions after 3.16. ...
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Interpolating between discontinuous contour lines and simple dots
I am trying to find the depths corresponding to purple point locations (given in picture). Depth information is given in contour lines. The main purpose is applying linear interpolation but I don't ...
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Areal Interpolation polygon to polygon using ArcGIS Pro
I am using ArcGIS Pro 3.0.0.
I have two multipolygons and I would like to interpolate the values of one polygon to the other. I found the Areal Interpolation tool which does exactly that. One of ...
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Linear interpolation for missing dates in Google Earth Engine
I have missing dates with no data which I want to create data for using linear interpolation.
Most examples create a masked layer and replace the masked values but its my understanding that to ...
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Incorporating Add Data step in ModelBuilder for ArcGIS Pro to create multidimensional raster from NetCDF file
There are functions in ArcGIS Pro to read in NetCDF files and create a single value raster but in order to create a multi-dimensional raster one needs to use Add Data and select multidimensional ...
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77
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Linear data imputation conversion to bilinear interpolation in Python?
I have a project where the task is to impute missing data values from a modis TIF file using Bilinear interpolation.
I tried to use linear interpolation to impute the missing values, but trying to ...
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1
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648
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How to deal with Nan value when using rioxarray rio.reproject()?
I was trying to use rio.reproject_match() to match the resolution of two xarray datasets. However, when I used resample methods like Resampling.bilinear or Resampling.average, a large area would ...
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Cloud masking (S2cloudless) and temporal gap-fillin interpolation on GEE (using Python API)
I need a time series of Sentinel-2 images freed from clouds and with the masked pixels of each image replaced by interpolated values (linear over time).
Thus, first, I applied the cloud mask as ...
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300
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Spatial raster data interpolation in Google Earth Engine (GEE)
I have calculated the monthly ET from the 8-day MODIS data:
// Region of interest
var roi = ee.Geometry.Rectangle([26, -24, 29, -27]);
// Calculate monthly MODIS
var monthly_sum_MODIS = ee.List....
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21
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Cannot resample min-max ranges on QGIS neither defining its NoData points
I have downloaded the blue marbel next generation with the topography of the ocean. The issue is that I am using a third party library that is configured to read geotiff rasters. Well, I'm using said ...
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TIN Interpolation - QGIS
I have a doubt and I would like to know if someone has the answer for it.
The TIN Interpolation tool let you add several attributes to be interpolated. While selecting several, the result is ONLY 1 ...
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Kriging output is blank
I have used kriging with default settings where I have five points with XY coordinates, ID and concentration. The concentration is ranging from 12 to 161900. The output I get from this is just a ...
