Questions tagged [interpolation]

The estimation of values at unsampled points based on known values of surrounding points.

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Spatial Downscaling of IMD temperature data using IDW in Python [closed]

please suggest a good library for IDW interpolation to be applied on 100km temperature data to get 25km gridded data
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Forcing boundary conditions in interpolated/kriged data?

I am using pykrige.ok import OrdinaryKriging to generate a spatially continuous field from sparse point data (see image below). The data (glacier ice thickness) are such that there is a hard boundary (...
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Seeking open source alternative to Spatial Analyst / 3D Analyst toolbox of ArcGIS Desktop

Is there a decent open source software alternative for the Spatial Analyst / 3D Analyst toolboxes of the ArcGIS environment? The main goal would be to demonstrate DEM interpolation and/or ...
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54 views

Error in “Extract values to point” in arcpy

I am working on spatial interpolation. To extract values for my required points, I am using "Extract values to points" tool from Spatial interpolation toolbox. The tool is working good in ...
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43 views

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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Kriging (or other interpolation) with integral constraints?

I would like to interpolate a continuous variable (from observed point locations) on a surface (gridded) but using an external constraint that the cumulative distribution function of the interpolated ...
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Regridding a rasterbrick in R using bilinear interpolation

I have a rasterbrick (of monthly precipitation data from 1901 to 2018) and it is currently in a at a resolution of 0.5, 0.5 x,y. here are the details of the data: class : RasterBrick dimensions :...
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Interpolating values in UTM grid [closed]

I've got a 10x10 km UTM grid (vector file), which I want to use for showing the distribution and abundance of a bird species. For each cell, I've got a value for the survey effort (number of days, ...
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Interpolating climate data over DEM in ArcMap

I tried to interpolate climate data using IDW by inserting DEM raster as a mask, but I got the Map of precipitation levels without taking into account elevation data. How can I get map of ...
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Having trouble with the Heatmap's (Kernel Density Estimation-KDE) interpretation in QGIS 3.10

i wanted to generate a density/concentration map of a parameter, in this case Carbon percentage in a water sample. The dataset in csv file looks like these : So, I imported the csv file then plotted ...
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QGIS: Interpolate height value on polyline from point-values for use as breakline in TIN-creation

We use point heights from a survey to generate a TIN. In order to improve the quality of the TIN, additional break lines should be defined. These break lines shall receive the height information from ...
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Spatial interpolation in PostGIS without outputting Raster

I have some data that is similar to rainfall, ie. a latitude, longitude, and a Z number. It is in a point layer that is a nice clean point grid. Many Z numbers are missing in this grid. I want to ...
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QGIS Linear Z interpolation on snapping

The interpolation of the Z value when snapping in the creation of a new feature is done well in QGIS 3.14, but when editing elements this does not happen. Is there any way to do it?
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How to interpolate sf LINESTRING to another pre-defined grid?

I have a set of sf lines, which on an irregular grid, in other words, they have random coordinates. Is there any way to interpolate LINESTRING coordinates to a regualr grid for example as defined ...
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Spatial interpolation of climate data using latitude, longitude and elevation in r

I have downloaded E-OBS gridded daily climate data on 0.1-degree grid. For each grid point, I have longitude, latitude, elevation and climate data, i.e. precipitation sum / mean temperature. Now, I ...
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Converting River Channel Cross-Section Data to Bathymetry

I have multiple surveyed cross-sections of river channels and need to convert this data into 3D polylines (shapefile) for use in a hydraulic model. The cross-section data is typically supplied in &...
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How does Empirical Bayesian Kriging handle sampling bias?

In ArcGIS Pro, simple kriging approaches allow you to de-cluster your data before applying a normal-score transformation. According to the Esri guideline, normal-score transformations are only ...
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Converting latitude, longitude to image coordinates

I have a 2D image and I know a given pixel in the image corresponds to a particular latitude longitude (so basically a reference point). The image I have is a camera image of an outdoor scene and I ...
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Fill/interpolate gaps in raster area WITHOUT extending the outer borders

I have a raster file that is related to a river bed in a curvy river section. Inside this raster file are gaps with no data (e.g. small islands, measurement gaps, etc...). I want to fill those gaps ...
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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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Creating and interpolating raster stack from CSV in R

I have a CSV of biweekly temperature values for the year 2011, at a 1000-m scale in part of the state of Iowa. The CSV contains ~95000 rows of temperature data, with the first 2 columns as the x and ...
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1answer
60 views

Image (band) interpolation

I have a set of sentinel 2A images. I eliminated those that contained too many clouds, and then I created a cloud mask using cloud probabilities and Otsu thresholding method to eliminate cloudy pixels ...
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1answer
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TIN interpolation to construct DEM shows strange triangulation

I'm working with QGIS and I am trying to create a DEM starting from a DXF containing the grid of points located at 5m from each other. The following picture shows the points imported: I used a TIN ...
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1answer
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Generating TIN and/or DTM from point feature data

I have parameter data that is linked to points within a polygon area. I am trying to find ways of creating an interpolated layer for the extent of the polygon within which the points are located as ...
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1answer
72 views

Interpolating z Values (height) from TIN (Raster) to line (vector) using QGIS

I have a raster (TIN) and I want to interpolate the heights (z-Values) to a line Shape. Everything that I find is interpolation between some points and making a raster. For example, Raster creation ...
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ArcGIS 3D Analyst Line Interpolator not working

I have a stack (8) of DEM layers. The 3D Analyst line interpolation tool is only extracting values from the first layer in the stack. I specify different layers in the 3D Analyst window butit still ...
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32 views

How to generate a DEM from a 3D point cloud in MATLAB?

I'm trying to generate a DEM (or a DSM if that works for this purpose) from a .ply point cloud in MATLAB so that I can generate a hillshade from it and this is what I have managed so far but have no ...
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Making a 3D map by interpolation by stacking data for different depths

So, I have the data of shipping Noise levels at various coordinates (300x300 km grid, with 900 coordinates). I have the Noise levels for 5 depths (10m, 30m, 50m, 70m, 90m) and I while I am able to ...
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Interpolating FROM points TO points (i.e. not to a new raster)?

Imagine I have two samples of XY points, lets call them A and B, distributed across the same area/extent: Points A have an attribute, lets call it N. I’d like to estimate (i.e. interpolate) attribute ...
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Interpolating SpatialPointsDataFrame to RasterLayer using autoKrige in R

I have a SpatialPointsDataFrame with elevation data and 51'257 elements. I also have a RasterLayer object of dimensions c(114,210) covering roughly the same area (all the spatial points are within the ...
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Bilinear resampling yields inaccurate/small values (Earth Engine)

I am trying to upscale / resample some GSMaP observations from 0.1 x 0.1 degrees to 30m. I want the resolution to match Landsat 8 so that I can perform some modeling. But in Google Earth Engine when ...
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116 views

TIN Output empty raster and corrupted Triangulation network

In Qgis: I've got a point shape (EPSG:3398) with some height info and want to create a TIN interpolated raster with the Qgis TIN-Interpolation tool. But after running there was a raster created, which ...
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QGIS: IDW interpolation doesn't work?

Beginner user of QGIS: I used the tool called IDW Interpolation from QGIS. In the picture below you can see how I did it, with vector points imported from a CSV file. However the OUTPUT is completely ...
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Zones are not made for every color variation

I have some ndvi values by which I have made interpolation (used IDW) map. When I use contour tool from Spatial Analyst tool it only outlines(blue lines) some data. I have tried different contour ...
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Reclassify a raster to floating point values range

I have an interpolation map for my NDVI data values ranging from 0.16 to 0.83. Example 4 classes, (0.16-0.28,0.29-0.36,0.37-0.53,0.54-0.83). But when I do spline interpolation classification goes from ...
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Interpolate nodata in rasters using Python

I have a raster of the shape (1000,1000) and some areas having no data values. I would like to fill the data gaps by interpolating or tinning (does not matter) over the surrounding areas, however I ...
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QGIS TIN Interpolation won't run (reports “Wrong or missing parameter value: Input layer(s)”

I'm trying to run the QGIS Tin Interpolation command, but get the following error message when I try to run the command: "Wrong or missing parameter value: Input layer(s)." The vector input to the ...
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1answer
60 views

How to set the layer attribute for IDW interpolation tool within a QGIS Python script

I have a custom Python script in QGIS 3.10 that integrates some QGIS tools. One of them is the IDW interpolation tool. My issue is I don't know how to properly set the layer attribute to be used for ...
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1answer
127 views

Interpolating DEM using Kriging in R

I have several DEMs as geotiff files which I load into R using raster::raster. Now some of these DEMs contain patches of missing values, represented by NA. I would like to interpolate these missing ...
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Spatio-temporal kriging

I have a geospatial dataset of air quality and I want to interpolate the air quality value across time and space for unmeasured location and time instace. I found gstat package in R could do the ...
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1answer
61 views

Flattening lakes for hydro-flattened DEM using polygon vertices in QGIS

I have the vertices around lake polygons that I want to flatten for a hydro-flattened DEM. I know that ArcGIS has a trend tool that will create a sloped 'plane of best fit' for a series of points, ...
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1answer
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Add symbology to raster - color ramp with manual breaks - in ArcGIS Pro

I would like to add symbology to my raster. It is a single band raster. I have a color scheme already imported in my ArcGIS Pro Project. I would like to have a color ramp but with breaks manually ...
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1answer
98 views

How to estimate time spent within a location using GPS/timestamp data in PostGIS?

I am new to PostGIS, and I am trying to estimate time spent in a location based off of interpolating time between GPS points (I am using PostgreSQL 12.2 and PostGIS 3.0). I have GPS points stored ...
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ArcGIS Pro - Interpolating causes longitudinal extent to increase (i.e. range(-180,180) instead of range(165,178))

I tried both IDW and (Ordinary)Kriging interpolations, setting both processing extent and mask (in the environment pane) for the study area, which works initially, as can be seen with the Raster layer ...
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Interpolation Failing with “triangle collapsed” When using the Interp Library from R

I am using R to try and extract the bathymetry profile along a line of bearing. The function that I have up till now was using the akima::interpp function. This was working swimmingly. I decided to ...
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30 views

QGIS KDE (Heatmap) TIF file --> Open in ArcGIS in order to use Kernel Interpolation With Barriers

So I've created KDE .tif files in QGIS, but there are currently no plugins available in QGIS, which takes into account barriers when creating KDE density rasters for species. I can bring the .tif ...
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Interpolation with barriers in Google Earth Engine [closed]

Does anyone have a code example or helpful information to conduct Empirical Bayesian kriging on Google Earth Engine or of an interpolation with barriers technique in Google Earth Engine?
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33 views

Create grid by interpolating two data sets?

I have two data sets A and B. Each data set have lat, lon and temperature but different lengths A=[200,3] B=[250,3]. I would like perform interpolate A and B and display the temperature(average ...
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1answer
97 views

How do I get accurate DTM from DSM to get tree height?

I have drone imagery which was generated in Agisoft. From the imagery a DEM was generated and exported. I would like to know how do I get the Digital Terrain Model from this DEM? as I currently have ...
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37 views

How to calculate interpolated timestamps of linearly referenced points in ArcGIS?

I have a point feature class with timestamp attribute belongs to bus-gps smartcard data-set. I've used linear referencing tool to snap these points to a bus-route. So there are milepoints in the ...

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