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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18 views

ArcGIS Interpolation IDW and Spline, extreme values

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 ...
0
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1answer
17 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" ...
3
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0answers
46 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
votes
0answers
51 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 ...
3
votes
1answer
195 views

Difference between Spline (spatial analyst) and Geostatistical Analyst?

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
100 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 ...
1
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0answers
30 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
vote
1answer
61 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,...
1
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1answer
31 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.
2
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0answers
41 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. ...
1
vote
0answers
63 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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0answers
47 views

“Handle bad layers” with spline plugin

I´ve been trying to use the QGIS Spline plugin and so far it was going pretty good, though I had a few bumps I got through with help. But now, the layers I've worked with have dissappeared (or have ...
3
votes
2answers
132 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 ...
7
votes
3answers
321 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
votes
2answers
177 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 ...
1
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2answers
1k 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
votes
0answers
80 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 ...
4
votes
1answer
783 views

Interpolating vertically in 3D analyst

Here is my problem: 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 ...
2
votes
1answer
269 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 ...
1
vote
0answers
15 views

How to remove coincident points with z values greater than min for Spline [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 ...
1
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0answers
1k 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 ...
0
votes
1answer
254 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.
2
votes
0answers
238 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 ...
43
votes
3answers
8k views

How to smooth the polygons in a 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 ...