Questions tagged [interpolation]
The estimation of values at unsampled points based on known values of surrounding points.
929 questions
2
votes
0
answers
40
views
Interpolating time along polyline in QGIS
I have a points file with timestamped and lat/long info, from which I have created a shapefile(PointsToPath), with many lines, based on different journeyIDs.
I can find the intersect points of these ...
- 21
4
votes
2
answers
240
views
Increasing points density by interpolating data in QGIS
I have a points vector layer. I'd like to increase the point density by adding new points in between the existing points. The new points should have the interpolated value, in between the value of the ...
- 376
3
votes
1
answer
77
views
How do I debug/Run issues with code while attempting to execute TIN interpolation in QGIS 3.36.0
I am completing a project for my master's degree on sedimentary layers across South Wales deposited by a marine transgression event at the end Triassic. For the project, we're attempting to generate ...
4
votes
1
answer
323
views
Is interpolation the opposite of aggregation?
In a book, to illustrate something, an author interpolated a trend surface from a series of events or individuals:
Can I say that aggregation is the opposite of interpolation?
I'm wondering because, ...
- 288
0
votes
0
answers
39
views
Interpolating within sub-units of vector layer in QGIS
I am having some trouble interpolating water data within individual watersheds, which are all part of one vector layer. I am working with groundwater data, so the watershed boundaries are important ...
- 1
2
votes
1
answer
83
views
PostGIS ST_InterpolatePoint() on 3D (Z) Linestrings
I want to get an interpolated measurement along a line, at the closest location to the given point. Intuitively, I thought I could use PostGIS ST_InterpolatePoint() directly on a 3D linestring, but it ...
- 31
1
vote
2
answers
89
views
Interpolation of points (z-values) to a water surface in ArcGIS Pro
I have point layer which includes the z-values that represent the waterlevel, from this I want to interpolate the data to a continuous surface. The water flows from south to north, so the waterlevel ...
- 655
3
votes
1
answer
130
views
Interpolating points along river from movement data over time in QGIS
I have movement tracking data in a spreadsheet for one specific fish.
Each row represents a date that a tracking station along a river picked up the signal transmitted by the fish. Each row includes ...
- 185
0
votes
0
answers
40
views
Generating all outputs from EBK Regression Prediction via Python
I've been working with the EBK Regression Prediction tool inside the Geostatistical Wizard, and I find it very powerful. One feature I particularly use is to quickly I get cross-validation statistics ...
- 2,828
1
vote
1
answer
66
views
How to use ogr2ogr -segmentize in three dimensions? [closed]
Reading How to use ogr2ogr -segmentize on a CSV file? aided us greatly, until we tried the third dimension.
$ cat m.csv
WKT
"LINESTRING Z (0 0 0,8 8 8)"
$ ogr2ogr n.csv m.csv -lco GEOMETRY=...
- 756
1
vote
0
answers
73
views
QGIS interpolation same value everywhere
I wonder if anyone can help me. I'm having the same problem as this person: QGIS interpolation gives same value across the grid, what am I doing wrong? , however this problem seemed to be fixed by ...
1
vote
1
answer
86
views
3D Analyst - Interpolate line from ArcMap to ArcGIS Pro
Does anyone know how to activate the 3D analyst tab in ArcGIS Pro? For ArcMap Desktop it can be activated by customize - toolbars - 3D analyst, and if you want to assign water level from TIN to the ...
- 11
1
vote
1
answer
146
views
Setting parameters for qgis:tininterpolation algorithm with PyQGIS
I would like to use the qgis:tininterpolation algorithm from QGIS 3.34.11 in a Python script. However, the layer input is defined in a strange way that is different to every PyQGIS algorithm that I ...
- 173
0
votes
0
answers
34
views
TIN Interpolation (the result didn't show up in Map Canvas)
I am having trouble with TIN interpolation.
Input Data:
DTM topography of study area
Mapped Points (with phone)
Latitude
Longitude
Elevation
Thickness (topsoil & rock)
I would like to create TIN ...
- 11
0
votes
1
answer
91
views
Interpolating drillholes data
I imported some drillholes data into QGIS and visualized it using geoscience and qgis2threejs, but I want to interpolate the drillholes, to create the smooth surface between the holes.
I tried using ...
