Questions tagged [inverse-distance-weighted]

Inverse Distance Weighting (IDW) is a method of interpolation.

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Calculating volume of IDW raster below Height of Plane, but it is failing

I am using ArcMap. I am trying to calculate the volume of water using IDW Tool. When I reach a point to calculate, the statistics below height of plane cannot run, giving me 0.00, What could be the ...
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Using Raster Clip

I’m not super experienced in ArcMap, but I’m trying to clip an IDW to the outline of a grid of my study area in Mobile Bay (and the Mississippi Sound). Problem is that when I clip it, it looks weird. ...
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ArcGIS Error 000861: Input feature is not valid

I am trying to execute IDW of dataset (.csv format) in ArcGIS 10.8. But it is showing following error How do I solve this problem?
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IDW plot miscalculation

I want to perform IDW in R and plot it with ggplot. Here is my code so far: library(tidyverse) kerpensample_df <- read.csv("C:\\Users\\49151\\Desktop\\kerpentest0909x.csv", ...
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IDW error in ggplot in R

I want to perform IDW interpolation and plot it with help of ggplot. library(tidyverse) kerpensample_df <- read.csv("C:\\Users\\49151\\Desktop\\kerpentest0909x.csv", ...
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Python gdal grid error in EPSG

I'm using gdal.grid() function in my Django project. gdal.Grid('idw.tif', geojson, zfield="vals",outputSRS ="EPSG:32643,WGS84/UTM zone 43N",format='GTiff', algorithm='invdist',...
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How to make a layer using mean squared error(MSE) from temperature prediction?

I made a temperature prediction for the next 4 hours using a dataset for 1 year with 10 minutes interval time. I have a file with the coordinates from 20 weather stations (longitude, latitude and ...
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Difference between interpolated map using IDW in ArcGIS and turfjs

I did the interpolation from the same map using arcgis and the turf.js library, using the same parameters and points. Could anyone say why the difference? ArcGIS params ArcGIS Map Turf.js params ...
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Resolution Setup for Precipitation Interpolation in QGIS

I am trying to interpolate rainfall data using the GDAL's Grid (Inverse Distance to a power) in QGIS 3.16. Is there a way to specify the resolution of the result/change the size of pixel? The ...
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How to create Inverse Distance Weight of points and sum the result (not interpolate)?

I have a list of point locations and I would like to create an IDW result that does not interpolate, but sums instead. So, each point would have a bullseye pattern around it, but there would be ...
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Change symbology of interpolation layer using ArcPy

The code below creates many IDW rasters: for date in all_dates: # Create a feature layer of each unique date where = "{0}=date '{1}'".format(arcpy.AddFieldDelimiters(datasource=fc, ...
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Using geopandas GeoDataFrame in gdal.Grid for spatial interpolation viz IDW, nearest neighbour etc

I want to interpolate the point data using IDW with GDAL osgeo.gdal.Grid. IDW_gdal = gdal.Grid(Output, input, zfield="rs", algorithm = "invdist", ...
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113 views

Interpolation layer not moving by time slider using ArcMap

I have temporal point data and time slider works well for points , but while I use IDW interpolation the interpolation raster is fixed and does not change by time slider. Is there any way to move ...
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Most appropriate weights for interpolating temperature for a point from raster data

I have raster data for minimum and maximum temperature from NOAA's CPC Global Daily Temperature data set found here https://psl.noaa.gov/data/gridded/data.cpc.globaltemp.html I also have survey data, ...
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Points interpolation on a polygon geometry

I would like to know how to interpolate point data on a polygon geometry. I have two PostGIS tables: the first one contains hourly rain values evaluated in the nodes of a regular grid (specified in a ...
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Upper and lower bounds from gstat::krige() and gstat::idw()

Is it possible to obtain lower and upper bound values from a kriging estimation using gstat::krige() in the same way it can be obtained from a simple lm() model? The following lm() example comes from ...
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Proper way to deal with repeated observations in IDW interpolation

I am trying to apply IDW interpolation in a situation where I have multiple clusters of points, and all points in each cluster have identical coordinates. My understanding is that different IDW ...
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Weighted Distance with Focal Statistics / Raster Calculator

I have a raster image of a road network with pixel values corresponding to vehicule frequency. What I would like is to calculate a weighted distance raster with the frequency as weight within a ...
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-1 votes
1 answer
103 views

IDW interpolation in ModelBuilder by column in ArcMap

I want to interpolate using the IDW method in ArcMap. I have to interpolate the values of several months for several years. I have the data in a shapefile in which each column has the values for each ...
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Including elevation information while temperature interpolation

I am working on ArcMap 10.5 for temperature interpolation. I am using IDW for interpolation. I need to compare the results with and without elevation data. However, I am unable to understand how to ...
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1 answer
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Using gdal_grid tool - set a defined extent

I want to use the gdal_grid interpolation tool. Is it possible to set a defined extent?
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R-ArcGIS Bridge - Interpolation with gstat library

I have a problem with the idw or krige function from the gstat library in R. I'm trying to use the gstat library and the R-ArcGIS bridge to load a shapefile from ArcGIS into R, interpolate the data ...
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1 answer
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Create an 'heatmap' based off of a numeric attribute in a point feature class [closed]

I have a shapefile with several points, each of which has a numeric attribute 'price'. I am trying to find areas that have the most potential revenue concentrated based off of the price in the feature ...
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AERSURFACE - How to calculate the inverse distance weighted geometric mean of surface caracteristics

I need to calculate the inverse distance weighted geometric mean of the cell values of different sectors within the 1-km radius from a weather station, using QGIS. I'll try to make it clearly below ...
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QGis GDAL Grid Inverse Distance to a power - Grid Size

When I run this function from QGis on a point shapefile, there is no option to determine the grid pixel size / resolution or dimensions. Am I missing something here?
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IDW Interpolation in QGIS 3.10 - Power Coefficient not working

Trying to set the power coefficient for the IDW interpolation in QGIS 3.10 in pyqgis. Whatever number I set it has no effect on the interpolation output - always the same output. The default is 2 ...
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Can non-elevation data be displayed in 3D? Such as EC measurements in soil over a surface?

I tried creating a tin in ArcScene with a raster I have from an IDW file of salinity at sample points in a field, but I can't get it to display as anything other than flat. My points range from ~1-40 ...
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596 views

Interpolation for unevenly spaced data points

I am currently having some trouble finding a good interpolation technique for unevenly distributed spatial data points. Let's give a quick example : I have a 1000 points dataset. As several surveys ...
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123 views

Splitting polygon by sections obtained from IDW interpolation

I used IDW to show the rainfall pattern over a region ... the attached picture show the result ... my area split into three ranges that show 3 different colors... How can I split one original polygon ...
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225 views

Geochemical maps with QGIS: Case of multiple analyses in a point [closed]

I am a newbie, using QGIS 3.4. My goal is to create geochemical maps of species distribution in water samples. I mine data from a database, regarding specific points, which are boreholes or springs. ...
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IDW succeeded but not visible in table of contents

I used now several times ArcMap 10.7.1 and until now everything worked quite well. For my Masters Thesis I have to work with IDW to interpolate my datas. It worked all the time. Now, I run the IDW ...
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1 answer
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Using IDW tool in ArcGIS Desktop

In ArcGIS Desktop 10.7 we have IDW tool, but when you want to work with it you should need two layers such as : Some points and a closed polyline (Boundary) as following: then using IDW: but I have ...
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For-loop to call fields for IDW-Interpolation

probably a question easy to answer, but I do not figure it out at the moment. I'm using station-data and do a IDW-interpolation to get average climate values in layer. The station's data is arranged ...
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1 answer
246 views

Add legend with ArcPy over my interpolated map

I have created an interpolated map with arcpy.IDW_ga and I am exporting it to PDF with arcpy.mapping.ExportToPDF. How can I add a legend to the map with ArcPy? In the end, I want to apply the code to ...
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3 votes
1 answer
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Evaluating elevation change between multiple LiDAR datasets

I am hoping to get some insight from others who are familiar with comparing multiple LiDAR surveys to one another. I have two LiDAR surveys with similar extents that I would like compare for elevation ...
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1 answer
276 views

Performing IDW for multiple Z field from attribute using ArcPy?

I have data with multiple columns as 1996_1, 1997_1, etc. I need to perform IDW for each column values and save it. I am a beginner with arcpy. Please help! The code is as follows: import arcpy, os ...
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1 vote
1 answer
88 views

ArcGIS IDW interpolation elongated?

I am trying to do a very simple interpolation with soil nitrate data. I wanted to do IDW because points close to each other should be most similar. I used the IDW interpolation function in ArcMap (...
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1 answer
705 views

Interpolating in QGIS 3.8.1

I have a problem with getting an Interpolation with the Interpolation Tool on QGIS 3.8.1-Zanzibar. I just performed an IDW interpolation via the QGIS toolbox, with values from a layer that are 18 ...
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IDW interpolation using QGIS?

I want to obtain the quantity of precipitation for each municipality in Brazil on a given year. For that, I'm trying to use IDW interpolation on QGIS to interpolate the precipitation data from weather ...
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1 answer
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Iterating through table for IDW says parameters are not valid?

I have a table with precipitation data from 5 weather stations and I am trying to iterate through the table to perform IDW on each field (month of precipitation). import arcpy from arcpy import env ...
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1 answer
388 views

IDW in QGIS 3.8

I'm trying to create raster interpolated layer by using the IDW tool. this is how my original points layer looks like: this is what I did in order to get the IDW interpolation: and this is the ...
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How to fill the gap by using IDW(inverse distance weighting method) in R?

I'm beginner of R. I'm trying to fill the gap using idw, but I still had no idea about this. The data in used is below: The names sequence of columns are date/SO2/CO/O3/NO2/PM10/Lat/Lon. As you see, ...
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0 answers
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Using GRASS v.surf.idw in PyQGIS? [closed]

I have a point shapefile I am trying to run the GRASS v.surf.idw tool on in python. Here is a link to the data: https://github.com/tanyahelena/qgis_data I have a short script which runs. I don't get ...
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Creating IDW of up to 20,000 points in ArcGIS Desktop? [closed]

I am create IDW interpolation of 60-70 points in ArcGIS. It takes 2 minutes. But when I create IDW of 20000 points in ArcGIS, it takes at least 4 hours and 30 minutes. I want to ask why takes much ...
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2 votes
1 answer
69 views

Interpolate Line Tool giving different results?

I have been using 'Interpolate Line' Tool in the 3D Analyst tool pack to create a profile graph so I can analyze interpolated results gathered from an IDW created surface. However, when I use the tool ...
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2 answers
866 views

Performing Inverse Distance Weighted (IDW) interpolation in Google Earth Engine?

I would like to know if interpolation like in the image below is possible to produce in earth engine. Can someone tell how to get it done because I can only do it in ArcGIS and QGIS. I found this ...
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2 votes
1 answer
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Running IDW, but values are '<1' not 0.934 so they are Strings not Doubles

I am trying to use some interpolation tools for analytical data of concentrations of Benzene for monitoring wells. A decent amount of our values for Benzene are '<1' (not 0.943 or 0.345) because of ...
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1 answer
2k views

R - IDW interpolation using gstat

It contains two coordinate columns dist for distance in x direction and rel_alt for an altitude in y direction. The other two columns are the data points for each combination of those two coordinate ...
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1 answer
146 views

Creating IDW-rasters from each field in large point feature set using ArcPy for ArcGIS Pro? [closed]

I am using ArcGIS Pro 2.3.2 I am trying to automate the process of making a raster (IDW tool) in model builder by iterating through fields as z-value. I saw some other question asking the same, and ...
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Why is raster boundary rectangular, not buffer?

First, I took very few points and did IDW and i got a circular boundary raster. This is because of the search radius i applied. If that is the case, for large number of points, the raster must look ...
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