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

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20 views

How does bilinear resampling work when converting a 10 meter raster to 30 meter?

There is a 10 meter resolution land cover raster. An analyst wishes to resample 10 meter raster to 30 meter raster. The analyst selects the Bilinear Resampling technique in the Resample tool of the ...
0
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0answers
22 views

QGIS - how to create an elevation map and extract interpolated point data [duplicate]

I maintain my own database of oil well information with thousands of curated points. I have lat, long, and subsea elevation 1) I would like to map a region of these points and create contour lines. ...
0
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0answers
18 views

How to interpolate Landsat missing values after exlcuding cloud masks in google earth engine?

I want to generate the annual mean NDVI from Landsat in Google Earth Engine. However, after excluding bad observations caused by clouds and shadows, the mean composite of remaining Landsat data will ...
0
votes
1answer
24 views

Create raster surface from points with barrier

I have a point layer, that represents an elevation in that given point. This I need to create a raster/surface/DEM from, preferably by interpolating by Nearest Neighbour method or some way Liniar ...
1
vote
0answers
41 views

Interpolation in QGIS shows wrong output result [on hold]

I have done interpolation (IDW and Nearest Neighbour) in QGIS. But interestingly the output shows the wrong result. The area where I have a huge number of points results in a lower Z value (it is ...
0
votes
0answers
56 views

Best interpolation method for categorical data [on hold]

I have point data representing the soil erodibility class (Very Low=1, Low=2, Medium=3, High=4, Very High=5). Now, I would like to interpolate this categorical information for my study region. Which ...
0
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0answers
57 views

GDAL interpolation ignores edges with nodata vals

I have a grib file with weather data in 0.25-degree resolution and I want to upsample its higher resolution. I used gdalwarp: gdalwarp -t_srs EPSG:3857 -of GTiff -wo SOURCE_EXTRA=1000 -wm 2000 --...
0
votes
0answers
39 views

Using rasterFromXYZ in R for QGIS under Krige-Baye

I am trying to run the script below in R for QGIS to produce a raster result. Everything runs fine but the image is not produced since the command rasterFromXYZ encounters a mismatch of elements in ...
4
votes
2answers
85 views

Interpolate smoothly nodata values in QGIS

I have a DEM raster where all the buildings have been extruded and now contain "nodata" values. I'd like fill the holes and get a nice and continuous surface (which would approximately correspond to ...
0
votes
0answers
15 views

Polygon interpolation neighbour average?

I am trying to estimate empty values based on a polygon layer we received from another study. Is there a way to calculate an average value for polygon A based on neighbours B,C, etc that border it? I ...
4
votes
0answers
80 views

GDAL grid Not recognizing csv as having geometry

NON-DUPLICATE EDIT: This question is not a duplicate because I have tried the solution presented as the answer to the "original" question and it did not work. See results below. I am attempting to ...
0
votes
0answers
39 views

How to interpolate ibutton transect temperature data ArcGIS

I have three transects on opposing slopes. Each transect has ibutton data loggers set to record temperature at hourly intervals. The loggers are spaced at 20m altitudinal intervals from 1550 - 1810m (...
0
votes
2answers
56 views

Line_interpolate_point: 2nd arg isnt within [0,1] in PostGIS

Im trying to interpolate a point on edge using ST_LineInterpolatePoint but it is giving an error saying that Line_interpolate_point: 2nd arg isnt within [0,1]' create table interpolate as ( select ...
1
vote
1answer
40 views

Plotting monthly SO2 map [closed]

I need to plot a map to show monthly SO2 emission point over a specific area. To do so, I have an Excel monthly dataset (derived from satellite data) contains a column for latitude, a column for ...
1
vote
2answers
30 views

Creating precipitation raster map in GRASS GIS?

I am trying to create a potential erosion map of my basin for which I require a rainfall distribution map. I have 3 stations' rainfall data for the year 2007- 2015. How do I create a rainfall map in ...
0
votes
0answers
31 views

Multilevel bspline interpolation

I'm trying to do ‘Multilevel bspline interpolation’ in QGIS using Python console, but I am getting errors such as “Algorithm not found ” and “wrong number of parameters.” Here is my code : ...
0
votes
1answer
31 views

Iterating Fields in shapefile and exporting after interpolation geoprocessing?

I have two shapefiles to be used for interpolating data. The first is a survey point with the following attributes: The second is a boundary file (Polygon) with the corresponding descriptions as an ...
2
votes
1answer
44 views

Usage of interpolation methods with DEMs: Linear vs. natural neighbors

Using the ArcGIS tool "TIN to Raster" (3D Analyst Tools --> Conversion --> From TIN) to work on my Digital Elevation Model I was wondering about the interpolation methods. I can choose either or: ...
0
votes
0answers
9 views

Tin Clip (EDIT TIN) not working. segmented. Tin Mostly vanishes from Polygon

This seems like an issue which should be easy to fix. Although I cant find out how to. I am creating a TIN of water surface height from polylines (which works) as you can see. Longer lines are to ...
0
votes
0answers
40 views

Comparing interpolation methods? [on hold]

I've done a fair amount of searching on the topic of interpolation due to a project that I'm on currently to interpolate weather data to specific road segments. I'm currently using the akima package ...
0
votes
1answer
28 views

Interpolation of holes resulting from DTM groundfiltering of SfM pointcloud

I am wondering if there is an efficient interpolation method to close the holes in a dtm resulting from groundfiltering. At the moment I am directly interpolating the point cloud to a raster using ...
0
votes
0answers
28 views

Using Kriging Tool for estimation in ArcGIS Desktop?

I'm working on an Exploration Project where i have few information about underground geological layer (for example: Phosphate). The wells with brown color present the known data (That we'll use for ...
0
votes
0answers
39 views

Error in gstat.formula.predict(d$formula, newdata, na.action = na.action, : NROW(locs) != NROW(X): this should not occur

I'm trying to perform regression kriging using the code creating variogram m <- vgm(var(soil$Ba), "Sph", sqrt(areaSpatialGrid(slope))/4, nugget=0) v <- fit.variogram(variogram(Ba~RASTERVALU, ...
0
votes
0answers
141 views

Could not create destination layer

I am using QGIS 3.0.3 to make a heatmap using processing toolbox, kernel density estimation. The input I am using: I have generated centroids from polygons using Vector --> geometry --> centroids ...
1
vote
1answer
96 views

How to extract specific values with point coordinates from Kriging interpolations made in R?

By using R version 3.4.2 and the library "geoR", I made kriging interpolations for different variables (bellow I give an example of my process). I also made a matrix with the coordinates for 305 trees ...
1
vote
0answers
41 views

Can I control how GDAL interpolates the edges of an array?

I am currently using GDAL 2.1.0 in a Python script to reproject a geotiff with a given pixel size into an other geotiff with the same projection, but with a different pixel size. To do so, I use the ...
1
vote
0answers
36 views

Qgis Interpolation TIN from srtm

I'm new in qgis and I'm trying to realize a DEM from contour follow this tutorial https://www.youtube.com/watch?v=Lzd5m0j3zTI&t=81s My data came from seven SRTM frame downloaded with plugin in ...
1
vote
1answer
56 views

Interpolating within a boundary using QGIS

I am interpolating species density in a tidal flat however I would like to limit my interpolation to the sampled area in the tidal flat. I tried making a shapefile of the sampled tidal flat area (...
0
votes
0answers
25 views

Grass gis - 3D data set interpolate to 3D raster

I have a dataset of 70,000 points and I would like to interpolate the properties as a 3D raster. I have created 'slices' of properties each meter of elevation in the model domain; approx: 200 slices. ...
0
votes
1answer
31 views

Using modeled surfaces together to make predictions?

My question is about stacking multiple rasters of predicted surfaces, that have some of the same predictors. For example, if I make a predicted surface using all the terrain attributes as ...
4
votes
1answer
118 views

Preparing dataset to perform co-kriging in R gstat?

This is the first time I'm using co-kriging in gstat. My problem is that I'm not sure how to prepare the data frame to supply to co-kriging when the variable of interest and auxiliary variables are ...
0
votes
0answers
17 views

Basic Procedure, asign value to point data, Interpolation of point data

I have a set of coordinates (kml-files) and a set of values (infiltration rates) that i want to assign to these points in order to then create an Interpolation of these values over a given area. Now I ...
3
votes
0answers
278 views

Difficulty using ordinary kriging in QGIS 3

I have a shapefile with 65 data points. Each data point has a value for NO2 pollution. I would like to use kriging to create a grid of NO2 pollution values for the whole area. I have tried using ...
2
votes
2answers
49 views

Determine values of a point based nearest point values - QGIS

I have some weather stations that receive and publish precipitation data every day. Then I have polygons (can be center points if necessary) that correspond to interest areas. I want to estimate the ...
0
votes
0answers
17 views

Splitting a polyline at vertices and calculating start and end measurements for new features based on a known measurement of the original polyline

I have a route network which has a length-attribute defining length of each feature. This length-attribute comes from a data register outside of gis. Now I need to split each original feature at ...
0
votes
1answer
70 views

Interpolating over time based on distance in R?

I have points with unequal distance from each other. Each point is a GPS sampling point which means it follows a non linear path. I have taken samples at defined interval: 1 hour. In each sampling ...
3
votes
0answers
114 views

TIN interpolation problem

I made a TIN interpolation of some height points but the resulting raster appears with some weird lines (like in the pic) What can i do to avoid this result? Here are the input parameters. Sorry ...
2
votes
2answers
55 views

Correcting merged LiDAR DEM with outliers in inner edges?

I've created a DEM from LiDAR data. After combining all the files, I could see that there are some problems through the tile borders. This is an screen focused in one of the cross section of 4 files ...
1
vote
1answer
93 views

Batch processing in QGIS SAGA Algorithm

i'm struggling to run batch processing multilevel b-spline interpolation for my surface area the below error message keeps on poping up after the process> Processing algorithm 1/3... Algorithm ...
1
vote
1answer
161 views

Filling NA gaps in raster with R?

I have soil data rasters from SoilGrids.org that have some small holes with NA cells (White spaces in the image) that I want to fill using some interpolation method to get a more spatially continuous ...
0
votes
2answers
234 views

IDW Interpolation in QGIS [duplicate]

I'm using the Interpolation plug-in in QGIS 2.18 to perform IDW Interpolation. I was hoping to specify a power of 2 and use the 10 nearest points to calculate the output, but I don't necessarily see a ...
0
votes
1answer
94 views

retrieve coordinates of all weather stations that falls in Germany in R [closed]

I have a historical temperature and precipitation observations in each individual txt file for the globe by year (I have total 35 txt file for yearly temperature/precipitation), and in my research ...
0
votes
1answer
40 views

Kriging interpolation with blocks as barriers for street level visualization in ArcMap?

I'm trying to do Kriging interpolation with blocks as barriers for street level visualization, but I can't realize how I can do this. I already have the barriers polygongs, data and all. But can I do ...
0
votes
0answers
11 views

What is the use of the 'kernel function' variable for the arcpy.LocalPolyNomialInterpolation() function

I understand how Local Polynomial Interpolation works. Also, I understand what the influence is of the selected Search Neighborhood. Say that I want to interpolate a surface representing an ...
1
vote
1answer
56 views

Using groundwater data in ArcMap? [closed]

I have raw data in the form of groundwater levels collected regularly over a couple of years. The values are collected in an excel file together with xy coordinates for the water wells (of which there ...
2
votes
0answers
36 views

Spatial Downscaling of global temperature in R?

I am interested in spatial downscaling of global temperature to grid cell. What I have is a vector of future annual global temperature values which I would like to downscale to (hopefully) 0.5°. ...
1
vote
1answer
91 views

Interpolate multiple point files using the python console in QGis

Using the python console in QGis, I would like to interpolate several point files (txt x,y,z) to make rasters. I have been trying this but it's not working and I don't know enough about python to ...
5
votes
1answer
1k views

TIN Interpolation QGIS 3.0 - Cell Size

I've noticed there is not an option to make the cell size for both X and Y the same when interpolating point data in QGIS 3.0. When adjusting the cell size in QGIS 2.18, the columns would ...
1
vote
0answers
134 views

How to create raster from data (x,y,z in Cartesian coordinate System)?

I have simulated many trajectories of an moving object. From simulations I have obtained data files where the trajectory is saved in terms of x,y,z coordinates recorded at equal time intervals. Each ...
3
votes
1answer
59 views

Interpolate Coarse Raster Contours

I have a raster elevation map that has two tiers of known elevation, and I am trying to produce a raster that will smoothly contour the area between the two tiers with a gradient corresponding to the ...