Questions tagged [spline]

A piecewise polynomial function that can have a locally very simple form, yet at the same time be globally flexible and smooth.

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2
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0answers
604 views

Leaflet: Smooth lines between points without control points? [closed]

Goal I want to connect points using a polycurve or curved lines in Leaflet in a scalable way. If possible, without defining control points. Approach I'm using the Leaflet.curve plugin which offers ...
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0answers
27 views

QGIS crashes instantly with multilevel B-Spline tool

I'm trying to use the multilevel B-Spline tool by SAGA in order to interpolate some points and create a raster image. But sadly while the process is running, QGIS crashed without any error message. ...
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1answer
107 views

Automated spline polygons from four points in QGIS?

I'm looking for a way to use QGIS for tree surveys which involves plotting four points to demarcate the NESW extents of a tree canopy and then generating a polygon that passes through each of these - ...
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72 views

Using spline / IDW interpolation for bathymetric profile of lake bed in ArcGIS Desktop?

I have partial bathymetric / topographic coverage at 1m resolution of a lake bed and shore and am trying to find an appropriate method for 'filling in the gaps'. I have tried using the following in ...
5
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1answer
2k views

Interpolating vertically in ArcGIS 3D Analyst?

I am working on mapping pollutant concentrations in a pond from point-sampled data. There are 50 sampling locations in the pond (randomly dispersed), and at each location there are three sampling ...
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1answer
107 views

Input a geometry spline through a negative buffer

Update My question is a duplicate of Extracting centerline of a Complex-Polygon in PostGIS/Python (though if anyone has a programmatic solution - that is, not ArcGIS but rather Py, C, Java, etc. - I ...
2
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2answers
231 views

Interpolating LiDAR scattered ground data?

I wonder if someone can give me a hint on how to interpolate sparse data. I have a 1km by 1km tile located in a dense rain forest area. Original LiDAR data are 37,395,021 points. I have played with ...
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97 views

Interpolating sparse bathymetry to correct global grid using ArcGIS Desktop?

I am using ArcMap 10.5.1 I am trying to update a global bathymetry grid (at 1 min resolution) with local sounding data (resampled to 1 min resolution). The sounding data is sparse and irregular in ...
52
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3answers
18k views

Smoothing polygons in contour map?

Here is a contour map for which all the polygons of levels are available. Let ask how to smooth the polygons keeping all vertices preserved in their exact locations? Indeed the contour is made on ...
-2
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1answer
593 views

Rainfall raster with spline in R

I need to create a rainfall raster with cubic spline in R, but I don't know what to do.I have precipitation heights and coordinates of the point where they are measured. Can anyone help me?I tried ...
4
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1answer
381 views

Elevation maps from point clouds: TPS vs. other methods?

In the reply to another question, @thehealingprocess refers to "...a comparison of interpolation methods for interpolating elevation maps from LiDAR clouds, and in almost all scenarios thin plate ...
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0answers
59 views

'Spline' tool in ArcGIS Pro keeps dropping collinear points

I am trying to convert the WorldClim dataset from their original resolution of 30 arc-seconds (WGS1984) to 25m cells (OSGB British National Grid) for use in Maxent modelling. I clipped the ...
8
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1answer
255 views

ogr2ogr TPS spline method creates progressive error

I am trying to adjust a shapefile using ogr2ogr spline transformation with cmd commands like: C:\OSGeo4W64\bin\ogr2ogr.exe -f "ESRI Shapefile" C:\path\output.shp -tps --optfile C:\path\gcp.txt C:\...
3
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1answer
334 views

Interpolation problem: Spline with barriers

I want to create a bathymetry map of a gulf using spline with barriers.When the interpolation finished the map in the gulf was created very well but a value is also created around the island. I tried ...
0
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1answer
91 views

How to delineate/vectorize polygons out of a spline surface?

Often I generate hotspot surfaces at the point level, I'll quickly run through my workflow: by taking the points, making a copy running the integrate tool at a 1-mile XY tolerance I am calculating ...
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0answers
36 views

Removing coincident points with z values greater than minimum [duplicate]

I am trying to run a spline interpolation on some terrestrial LiDAR data, but it keeps failing (I'm getting error 010235 - returned error from spline process and error 010067 - error executing grid ...
2
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2answers
388 views

Spline Tool does not work

In QGIS 2.12 the curves tool is integrated by default, I know. I would like to test the Spline Plugin whether it works better for my purpose or not (purpose is just to digitize streets mit nice curves,...
2
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1answer
1k views

Difference between Spline (spatial analyst) and Geostatistical Analyst? [closed]

Why the interpolation result of Spline with Tension in the Spatial Analyst is different from the that in the Geostatistical Analyst (both in ArcGIS 10), including their minimum values, maximum values, ...
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0answers
322 views

ArcGIS Interpolation IDW and Spline, extreme values [closed]

I am trying to interpolate air pollution data that is displayed in 1x1 Km points in ArcGIS. I am having two issues: When I try to interpolate using IDW, the software freezes at 94% "building search ...
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1answer
59 views

Set up files for spline

I've converted "Polygons to Raster" so I can perform a spline, but I can't git the raster as in input on "Spline" without Error 000840. Tracking down other solutions, I tried to "Make Feature Layer" ...
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0answers
97 views

Choosing interpolation method for monthly atmospheric parameters derived from AQUA/Air satellite?

I want to investigate atmospheric refraction and i am using Aqua/ Airs satellite data. These are atmospheric parameters (1) Air temperature (2) Geopotential height (3) Relative Humidity All these ...
3
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2answers
1k views

Measuring error of Spatial Analyst interpolation such as spline, nearest neighbor and kriging?

I am planing to use interpolation method using spatial analyst tool and I found several methods like spline NN and kriging. I know I can do interpolation using geostatistical analyst but some ...
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0answers
152 views

Building a DEM with both a raster and vector points [closed]

So I'm struggling here, trying to get a decent DEM for the Azores Islands because I want to include bathymetric data on it. I have a raster with elevation for the islands (land) with a 30 meter ...
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0answers
853 views

How can I smooth a discrete raster in ArcGIS?

I started with a continuous spline raster of hotspots, classified by standard deviations from the mean. This displays as 7 classes, but since it's a continuous raster in ArcGIS 10.2, it appears nice ...
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0answers
45 views

Can I interpolate but follow the trend of another surface?

I have a point data set will a fairly low sample density and a raster that should loosely correlate with the values of the points. For example, this could be elevation and temperature readings. I want ...
1
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1answer
67 views

Spline plugin doesn't active after being installed?

I just intalled Spline plugin But then it is not activated on the toolbar What can I do right now? I use QGIS version 2.10.1-Pisa. Windows 7 x64bit.
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0answers
95 views

Spline plugin doesn't work

I have Spline plugin installed. It is activated. When I try to draw a curved line it doesn't change into a curve. The lines remain the way I have drawn them. I am using QIS 2.10.1 with Windows 8 or 7. ...
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0answers
392 views

Why does gdalwarp's cubicspline method expand into nodata areas?

The image below shows part of a peninsula on the Australian island of Tasmania. The black pixels are 9" climate data with GDA94 (EPSG:4283) SRS, projected by QGIS on the fly to Australian Albers (EPSG:...
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1answer
339 views

Tools in the Sextante toolbox in QGIS 1.8 for interpolation?

What tools in the Sextante toolbox in QGIS 1.8 can be used for interpolation (kriging and spline)? I have looked at every single one and could not figure it out.
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2answers
4k views

How to create spline in QGIS [closed]

I want to create spline in QGIS. I have tried to use Cad-tools - Create spline line\poligon but I can only draw it and can't save. What is wrong I am doing? Is there other way to create spline?
2
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1answer
648 views

How to Interpolate through ModelBuilder?

I would like to create an iterated interpolation tool through ModelBuilder. I have an excel file containing different columns and each column represents a data that will be interpolated using Spline ...
7
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3answers
798 views

Interpolate data from multiple gpx tracks

I have a number of GPX tracks of the same road. But due to GPS error they are not accurate enough (20-30m off). I'm wondering if I could interpolate those multiple gpx tracks into single one. If an ...
3
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2answers
304 views

Quality estimation of a spline interpolation with barriers

I interpolated the age of minerals for the Inner Tien Shan mountains (Kyrgyzstan) using the ArcGIS tool "spline with barriers". I use ~ 200 points for my interpolation. The barrier that I use is a ...
2
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0answers
147 views

Spline interpolation - 3D analysis [closed]

From the help document, spline interpolation is supposed to produce a surface runnin through the exact input point. i have about 100 point and run spline interpolation. i also extract the interpolated ...
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0answers
2k views

Error #010067 when running spline interpolation

I am attempting to run a spline interpolation on a point dataset of 585 features in ArcGIS 9.3, using the spatial analyst toolbar. The dataset holds only latitude, longitude and abundance attribute ...
2
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0answers
578 views

Limiting the maximum and minimum values of an interpolation surface tool (ArcGIS, Spline)

I've been using the spatial analyst spline tool in ArcGIS 10.1 and was wandering whether it is possible to limit the maximum and minimum values to those of the z-attribute. Currently the spline will ...