Questions tagged [interpolation]

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

Filter by
Sorted by
Tagged with
0
votes
0answers
35 views

TIN interpolation problem - QGIS

I have made a TIN interpolation of height points and ended with this. However, when I open the table of attributes of this file, it shows no attributes at al. This what I put in the console:
1
vote
0answers
42 views

Which resolution is appropriate for resampling a raster in a specific CRS in QGIS 3.6? [closed]

I'm trying to resample a raster file to obtain smooth interpolated levels in EPSG:3120 - Pulkovo 1942(58) / Poland zone I projection. (following the steps in this answer) 1. Using the raster ...
2
votes
1answer
45 views

Interpolation (TIN) from Python Console in QGIS

I am referring to the most voted answer by root676 in Calling interpolation plugin from Python console of QGIS. root676 ends his/her answer with: Keep in mind that the QGIS-API is currently ...
1
vote
0answers
24 views

BASEmesh plugin error while interpolation between quality and elevation mesh

I am creating a 2D hydronumeric model of a watershed. The quality meshing and elevation meshing are fine, but I am getting the following error during interpolation. Does anyone know what should I do? ...
2
votes
1answer
44 views

Copying set of points perpendicular along polyline using PyQGIS

I have two layers, 'river (line)' and 'points' for a set of points laying on a line which is perpendicular to the river (for example red points in the first image). Given an interval (5.0 m for ...
1
vote
1answer
39 views

Adding points every X distance along a LineString [closed]

I have a list of LineString coords: list = [(90, 170), (99.0, 159.0), (321.0, 159.0), (300, 146), (296, 23)] which looks like this. How to interpolate a point at every X distance along the line ...
0
votes
0answers
14 views

Comparing Geostatistical Interpolation Results based on statistical parameters

Using Geostatistical Analyst's cross validation results would it be wise to compare the results I am getting RMSE values for different interpolation techniques (e.g IDW, Radial Basis Function, Kriging ...
1
vote
0answers
28 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. ...
1
vote
3answers
50 views

Rainfall interpolation using ArcMap

I have a layer that describe rainfall for 10 years. Now I want to interpolate the area in ArcGIS Desktop (ArcMap) 10.7. As you know I should define some point on my area to extract the rainfall from ...
2
votes
1answer
33 views

lidR - lasnormalize error handling

When normalizing a lasCatalog, the processing stops early with the following error: An error occurred when processing the chunk 22. Try to load this chunk with: chunk <- readRDS("/tmp/RtmpdcuTUO/...
0
votes
0answers
36 views

Interpolating surface as though bare earth DEM after using Extract by Mask in ArcMap

I have some stone wall features that I need to determine the height of in ArcGIS Desktop. I have extracted the features out of the DEM by using the extract by mask tool. Now I need a method for ...
1
vote
0answers
19 views

Elevation point raster interpolation [closed]

I have a series of elevation points from transect surveys completed on a river. I would like to interpolate this data to reveal the bathymetry of the river. The survey points are shown below: I ...
0
votes
1answer
48 views

Adding elevation to shapefile in ArcGIS Desktop

I have a shapefile that's actually a polyline (but it's 200 miles!) on the other hand I have a SRTM layer with elevation data. How should I add the elevation data from SRTM layer to the shapefile? ...
1
vote
0answers
22 views

Is latitude valid as covariate for spatial interpolations?

I have information of minimum and maximum mean monthly temperatures Tmin and Tmax, respectively), from more than 300 weather gauges and now I require to create interpolated surfaces of temperatures ...
0
votes
0answers
28 views

When creating a Nearest Neighbour from xyz, the raster cells are not centered with the original point cloud (QGIS)

I have a gridded point cloud 0,25x025. I ran a Nearest Neighbour with the same resultion (cell 0,25). The points of the cloud and the raster are not centered as seen in the picutre. Am I doing ...
1
vote
0answers
22 views

Digitized contours on map and interpolate contour line to create surface

I have digitized the contours on a map and I want to recreate the surface by interpolating (using IDW) using these contour line. When I generate contours (extract) to see how well they match with the ...
1
vote
1answer
45 views

Creating elevation grid point from DEM [closed]

I have photogrammetry DEM with 3 meter resolution. I need grid point with 30 meter resolution with the 3 meter accuracy. Case-1, I created the the 30x30 meter grid points and extract the elevation ...
2
votes
0answers
21 views

Creating surface layer from Points in ArcScene

I work in ArcScene where i have some buildings in 3D, on the facades of these buildings in have points of solar intensity. I would like to create a continuous surface of solar intensity for each ...
1
vote
1answer
39 views

Kriging error when writing ArcPy script (ERROR 000622 & ERROR 000628)

I am trying to write an ArcPy script that uses Kriging to interpolate various nutrients in the soil (i.e. nitrogen) using ArcGIS Pro 2.4.0. These nutrients were collected by sampling the soil, so it ...
1
vote
0answers
53 views

Interpolate values in QGIS attribute table

I've got a point shapefile of river sonar data. It got only two fields: id and depth. I want to interpolate depth of selected 40 points (arranged by id) value from 1.49 to 1. Any idea how can I do it ...
2
votes
0answers
20 views

Appropriate Interpolation accuracy and method for a particular project [closed]

I'm trying to find the best interpolation method for a project I'm working on. I've tried the basic settings with spline, IDW & kriging and they all appear ok at first glance, but when I look ...
1
vote
2answers
89 views

Creating a clean TIN interpolation without “Bleeding” in QGIS

If you assume I know little to nothing about QGIS 3.10, but have been attempting with some success to create fictional world maps with it, and that I have very limited (OpenScript and Excel) ...
0
votes
1answer
28 views

It is possible to create a raster map using a vector dataset in GeoServer?

I need to create a map of pressure shades using a point data set having each point its value of pressure. So I need to give a color to each point based on its pressure value. But after that I need the ...
2
votes
0answers
33 views

Are interpolation methods the same in all software, produce the same result ( with same settings) or does it differ from software to software? [closed]

I was wondering if interpolation algorithm has been changed? produce the same result in all software so it is not software based. This would be if the settings are exactly the same of course. Let's ...
2
votes
0answers
58 views

Error while performing kriging interpolation in QGIS 3.8.3

I am using QGIS 3.8.3 -Zanzibar in order to perform kriging interpolation. I get this error massage: "algorithm 'Ordinary kriging' starting… Input parameters: { 'BLOCK' : True, 'DBLOCK' : 100, 'FIELD'...
2
votes
0answers
61 views

Is there a way to create a DEM that follow the point cloud so you don't need to clip the DEM after?

I would like to create a DEM from an XYZ file (gridded 0,25x0,25) with 0,25 cell. I'm wondering if there is a way so that my interpolation follows my point cloud, instead of covering a rectangle like ...
1
vote
1answer
40 views

Rasterise 3D polyline using z-values to interpolate cell values

Using ArcMap 10.5.1. I have a ZM polyline composed of 3x vertices, with the vertex z-values representing water level at wells. I am looking for a tool to rasterize this polyline, using the z-values ...
1
vote
0answers
54 views

Interpolating Z values from XYZ point dataset to alternative XY coordinates in QGIS

I have a dataset with X1,Y1,Z1 values (x coordinate, y coordinate, elevation -> the red dots in the image below). I also have another dataset with alternative X2,Y2 coordinates (-> the blue dots in ...
1
vote
0answers
65 views

Way to speed up TIN interpolation (Delaunay triangulation) QGIS 3

Are there ways to improve processing time for TIN interpolation? I'm using TIN interpolation as a step in a larger process. The interpolation step is taking a very long time (10+ hours to a few ...
1
vote
1answer
41 views

Seeking algorithm that can re-locate vertices on linestring so that line does not intersect land polygons

I'm currently working with GPS data gathered from boats. The data has low temporal resolution (every 5 minutes) which causes the linestrings that display the boat's trajectory to be jagged. An example ...
2
votes
0answers
25 views

Clipping interpolated raster with shape of original point data-set

I have a point dataset with XYZ values. I inserted this layer in QGIS 3.6 via layer > add layer > add delimited layer. Then, I interpolated these points to a raster via interpolation > TIN ...
3
votes
1answer
32 views

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 ...
1
vote
0answers
83 views

Interpolating VRT to Geotiff using gdal.Grid in Python creates null image

I have a set of points with X, and Y coordinates and associated Z values POINT (-102.9071045 31.43453407 1871.930298) POINT (-102.8339386 31.45111084 1856.14209) POINT (-102.4687424 31.53144836 1869....
1
vote
0answers
37 views

Creating interpolation maps in QGIS 3 [duplicate]

I'm trying to create an interpolation map visualizing the global distribution of genetic markers - basically replicating the attached map. Can it be done in QGIS 3.8 (Zanzibar)? I installed QGIS 3 ...
0
votes
0answers
15 views

Interpolating raster from points from a vertical datum conversion point feature class

I have a shapefile with points distributed uniformly representing the difference between two vertical datums. These are spaced in 4 corners of a 2950 x 3700 square. I would like to create a ...
0
votes
1answer
65 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 (...
1
vote
0answers
60 views

Creating DEM from points in QGIS? [closed]

I'm trying to make DEM from points in QGIS. I've read all the other questions regarding the same issue and tried them all. But, none of them worked. For example, at the end of inverse distance ...
2
votes
1answer
349 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 ...
0
votes
0answers
50 views

Interpolating polyline in Cesium?

I have a line on map ( actualy is a polyline ) and need to move the camera or an entity model along it. The examples I've seen uses only path with czml but I need something more simple like divide ...
0
votes
0answers
21 views

Disorted Raster Using TIN

I'm trying to create DEM based on TIN from points layer that I have. this is how the layer looks like- when I try to use the TIN interpolation tool I fill it like that and I use the layer extent- as ...
1
vote
1answer
72 views

Interpolating raster data with PostGIS

I'm currently using CDO to extract data from netCDF files containing satellite meteorological data. In the netCDF file points have a resolution of 0.5 degrees, so when data for a specific coordinate x,...
2
votes
0answers
26 views

Clipping interpolation layer to a coastal boundary in QGIS 3.6?

I have created an interpolation layer and want to clip it so I don't see the area outside the coastal boundary. map showing area to be clipped:
1
vote
0answers
29 views

Resampling while drawing rasterfiles in QGIS 3?

I can not find a solution to resample my rasterfiles in QGIS 3. With Arcmap usually I use "resample while drawing" with the method cubic or bilinear interpolation for continuous data to smooth my ...
1
vote
0answers
26 views

Multiply two image collections with different sizes based on dates

I have two image collections. They are both filtered by date beginning on Jan 1, 2019, and ending on today's date. The size of the first (kc) is 35 images and the second (ETo) is 225. The first has an ...
1
vote
1answer
110 views

Creating rasters from LiDAR using parameters other than elevation, intensity or class?

There are a number of tools out there that can create a raster from a LiDAR point cloud by interpolating elevation, intensity or class values, but these tools generally limit you to interpolating ...
1
vote
0answers
57 views

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 ...
0
votes
1answer
54 views

What are the formulas used in SAGA Ordinary Kriging?

can some one name the formulas avaible in the Ordinary Kriging Modul of SAGA: What ist the exponential, spherical, Gaussian-Model, etc.?
1
vote
1answer
43 views

Speed- and COG-aware trajectory interpolation/resampling using Python

I have a set of ship trajectory points that were irregularly sampled and I would like to resample them to a fixed frequency (e.g. every minute). Rather than just linearly interpolating between ...
1
vote
0answers
31 views

ArcMap: interpolation for single polygons individually

The red polygons in the image represent the boundary of infills. The raster (colored area) within the polygons is interpolated from the point shape file (black dots). The image shows an example where ...
1
vote
1answer
231 views

R kriging raster returns NA for some prediction points?

I am trying to interpolate a raster layer of chlorophyll-a data using kriging (gstat::krige) in R, however the resulting interpolation is showing NA values in a peculiar straight line through the ...