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

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14 views

What is the ArcGIS equivalent of Multilevel B-Spline Interpolation (QGIS)?

I need to interpolate a raster so I can make better contours. I've used the QGIS version with a lot of success, not sure how to do it in ArcGIS though.
1
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0answers
48 views

Can MapboxGL use nearest neighbour interpolation for overlay image? [closed]

In HTML+CSS version of mapbox/leaflet I can set image-rendering option for .leaflet-image-layer with CSS to choose interpolation method. How can I make this in GL renderer? UPD Solved You can set ...
0
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1answer
33 views

get lat/lng of an object X inches from the GPS

I'm working on a project where I have a gps and two receivers to create a triangle with a transmitter. The problem I'm trying to figure out right now is how can I get the position of the two receivers?...
0
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0answers
12 views

ArcGIS trim-mean interpolation

I am trying to create a raster dataset from regularly spaced point data. I would like to use a trim-mean function rather the more standard mean function. Is it possible to do this?
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0answers
15 views

Interpolation of noise data [closed]

I would like to know the best method for the interpolation of noise data. The data is of discrete model which is sampled from various points. now i would like to make it in to a surface. Which is the ...
0
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1answer
232 views

How to create soil-type maps using QGIS

I am trying to create a soil-type map of an area from point data using QGIS. I tried interpolating the data, since soil is continuous. I did this by allocating a number to each point type and then ...
1
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1answer
54 views

Visualizing interpolation result with three js in QGis

I used topographic map to trace the contours in QGIS. For each line, I added an attribute value (ex. 565, 564, 563 etc). After that, I used the IDW and TIN interpolation methods to create a couple of ...
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0answers
11 views

How to perform an anisotropic Elliptical Inverse Distance Weighting (EIDW) interpolation in R?

River bathymetry is generally more variable in the transverse than the streamwise direction, so I need to use anisotropic interpolation technique like Elliptical Inverse Distance Weighting (EIDW) (see ...
3
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2answers
546 views

How to obtain closest point of point over polylines layer in PostGIS 1.4 (without st_ClosestPoint)?

I´ve got a polylines layer (pipes) and a points layer (valves) and In Postgis 1.4 I would like to obtain the closest points but exactly on the closest polyline. In other words, i need to locate each ...
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0answers
36 views

cellinp and cellout in v.vol.rst

I am trying to use v.vol.rst in Grass 7.0.4 to interpolate temperature values considering elevation. The answer of Grass to my attempts is: WARNING: Unable to create cellout raster map without cellinp ...
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0answers
47 views

False calculated slope?

After the DEM creation, I wanted to create slope layer. However the result has not satisfied me. I don't think the slope map is correct. Have you ever encountered false calculated terrain map?
3
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1answer
117 views

Interpreting results of QGIS intepolation and Heat map from point shapefile

I have taken a step interpolation and heat map of the data point shapefile (building Centroid) with QGIS ver-2.8.1, as shown below. My question are: What is the difference of the two methods? How ...
1
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0answers
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 ...
2
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2answers
446 views

Store GPS trace with timestamps, then interpolate location by time

I'd like to: Load a 1-second interval GPS trace (not GPX) into PostGIS Then query the table at sub-second accuracy (about 5Hz), and get PostGIS to interpolate the location by time. Is this ...
1
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0answers
25 views

Understand ramp color interpolation using QGIS 2.12

I try to understand the color ramp in TIN and IDW interpolation. I work with height points layer. The low value in 8 and the highest value is 584. With the interpolation plugin i create TIN raster ...
2
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1answer
197 views

what is the difference between topo to raster and points to raster tools in arcgis

I am working with point data, and I've found two ways to create raster data. 1 Topo to raster 2 points to raster the values of each result are different, and here are some pics for reference. ...
1
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3answers
34 views

Interpolate Shape point data with integer data into raster

I have a shape file I brought into QGIS with a lot of point data. One of the data layers represents an integer value that is assigned to each position. I am attempting to create a raster map of ...
0
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0answers
64 views

R-Studio0.99, How to compute correlation between two rasters and serial correlation

I am using R.Studio0.99 version installed on my HP Laptop 4th generation (8GB RAM) windows 8 operating system and I know how to use R studio and some of the library to incorporate spatial data (raster,...
3
votes
3answers
723 views

How to connect contour lines from two different sources?

How to connect contour lines from two different sources (LiDAR & Photogarametry) in order to obtain continuous and uniform contour lines layer ? how can i interpolate them together ? How can i ...
2
votes
1answer
49 views

Interpolation from WFS point layer

In QGIS, I added a WFS-Layer from my geoserver, containing few point data with a numeric attribute (Z-values). This works fine, and all the points display on the map. Now I just assumed, I would be ...
0
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0answers
12 views

Overlaying data from a raster generated using Interpolation tool with Shapefile or a raster

For my project, I intend to identify if parameter A has been exceeded in forests. I have a shapefile for forests and converted that to a raster (if needed). I have point data for Parameter. I used the ...
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0answers
8 views

What is the standard method of finding satellite positions in between the 15 minute intervals in an SP3 file?

SP3 files provide satellite positions for every 15 minutes. How would you find the satellite position at a time between two logged positions, i.e. 7 minutes after the last logged position? I can ...
1
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0answers
29 views

Grid interpolation using a new calculated field

Still learning.... I am trying to run the grid interpolation tool on a point shp file. I can successfully use the tool with the existing data but cannot run the tool on a new field I created in the ...
1
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1answer
43 views

Interpolating bathymetric data to make a volume estimate

I have 3 m resolution bathymetric data of a lake that I want to use to make a volume estimate of a landslide deposit that is on the lake floor. Basically, I want to interpolate the bathy data to make ...
5
votes
1answer
65 views

Why do I get a shattered-glass effect when I turn on hillshade for my IDW surface?

I made an interpolated IDW surface with a cell size of 500. In the symbology tab of ArcGIS, there is the "Use hillshade effect" checkbox underneath the classification area. When unchecked, my surface ...
3
votes
1answer
345 views

How to interpolate raster to get finer resolution?

I am working with precipitation raster layer. It happens the raster data to be in a resolution of 0.25 degrees grid. How could I interpolate those pixels to have a better resolution, say, a resolution ...
0
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0answers
21 views

How can I create a NetCDF from precipitation rasters data in R? [duplicate]

I have a lot of precipitation raster data (more 5000 files GeoTIF), created by kriging interpolation. All grid cells have the same size and the maps the same spacial extent I want merge all data in ...
2
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1answer
107 views

Error in In predict.gstat in R

I am trying to do kriging by gstat pcakge through R. Here is my Code: krg<-krige(var ~ 1,data,grid,model=vgm,nmax=30) But each time I recive this warning: 1: In predict.gstat(g, newdata = ...
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1answer
333 views

Creating an R factor raster in RUSLE Soil Loss equation with multiple input rasters

I am attempting to obtain the rainfall erosivity "R" factor for the RUSLE Soil Loss equation using rainfall PRISM 30 year history data. I have both monthly and annual data that comes into ArcMap as ...
0
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1answer
55 views

Creating SpatialPolygons in R

I am trying to do kriging with my data. But there is a problem here. I want to use krige command in gstat package. But I do not have "Spatial object with prediction/simulation locations". How I can ...
2
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2answers
68 views

Topography data to elevation raster

In a previous question (convert-xyz-points-to-topography-and-calculate-mean-slope), I asked how to interpolate point elevation data to a raster in order to measure slope. Thus I use the Raster > ...
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0answers
26 views

R: how to correctly set number n for sample grid for IDW?

I'm trying to make IDW in R. In my tutorial, I found this approach which is easily understandable, expect of one point - why they used n = 6000 ??? how did they established the value to create a grid ...
3
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1answer
49 views

Use Interpolation extension from python

I would like to use interpolate point data to create a raster in QGIS. I am doing batch analysis so I would like to use a python script. I found this question : how-to-add-an-interpolation-raster-...
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0answers
47 views

Python script iterator to interpolate accross multiple fields of attribute table

I interpolated precipitation data in ArcMap (ver. 10.2) using a surface-fitting tool [e.g. Global Polynomial Interpolation (GPI)]. I built a GPI model using model builder in ArcGIS 10.2, but the model ...
3
votes
1answer
56 views

How can I interpolate multiple years of daily precipitation data to generate a daily time series?

I am trying to use ArcMAP ver. 10.2 to create several models using model builder. The model will be created to: 1) interpolate 7 years of point measured precipitation data (long integer format at a ...
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0answers
29 views

Densification of Point Layer to get smaller Voronoi Areas

I'd like to densify a point layer to get a better spatial distribution. With "better" I mean homogeneous distributed. If I had to quantified my improvement, I would calculate the voronoi diagram and ...
0
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0answers
29 views

Interpolating logarithimic values - groundwater pH

I am using Spatial Analyst to interpolate surfaces for several groundwater parameters based on point observations at monitoring bores, including groundwater level and pH. It suddenly occurred to me ...
4
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0answers
118 views

Interpolating species data from sample points in a small area [closed]

I have sample data from a small site (10 acres) which shows the number of occurrences of a particular species of snail over two sampling periods (fall and spring sampling). I want to try and ...
7
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4answers
4k views

How to interpolate temperature correctly?

I tried to interpolate the mean avyerage annual temperature to produce a "realistic" surface.In qgis I used Raster-Interpolation-Interpolation. Both methods TIN and IDW did not deliver a "realistic" ...
0
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0answers
70 views

collocated cokriging with gstat in R

I am trying to perform cokriging with temperature as the target variable and elevation as a secondary variable. Elevation (the secondary variable) is collocated with temperature (the target variable) ...
0
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1answer
25 views

Manually changing/suppressing z-values in Spline with Barriers interpolation that are known to be erroneous?

I've included an image of a project I'm working on. There are two layers representing sub-surface geologic formations, and these were generated using elevation borehole data (so, point data), to ...
1
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2answers
69 views

Getting similar IDW results using Spatial and Geostatistical Analysts for spatial interpolation of data with many zeros?

My data are plant biomass data from hundreds of sites. Most sites have zero biomass; these zeros are real. Thus, my data violate most assumptions of geostatistical interpolation methods (confirmed ...
1
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0answers
24 views

Precision of marker being placed on polyline

I'm attempting to place a marker on a polyline between two lat/lngs at a given percentage. Now, I know I can do this with google maps, but I need to be able to calculate it in backend code and return ...
2
votes
1answer
165 views

Interpolation code with Mapbasic

I have a drivetest data, and usually I do an interpolation using the values taken in the drive with their respective lat/long. I use natural neighbor. You can see an example attached. I am trying ...
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0answers
31 views

Creating pooled variogram in gstat

I am currently using gstat to perform ordinary kriging on daily fields of some variable - that is a new variogram is fit for every daily set of observations. I would like to compare this with ...
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0answers
47 views

Edit script to use in ArcGIS-R-Bridge

I have an interpolation script running in R which I now want to implement into ArcGIS so I can use it independently with any shapefile. To get to a result I scripted in 3 steps: Original R script: ...
2
votes
1answer
175 views

QGIS: what is the difference between heatmaps and interpolation plugins?

I need to generate a raster looking like a « heatmap » based on a points layer. On this layer, each point represents a nest (bird population study). I need to produce a nest density map (raster) from ...
0
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1answer
68 views

How to calculate and compare RMSE between DEM using different interpolation methods?

I have data from aerial photo, it was built from stereo photo so I have 3D information that I am using for the DEM. I extracted it into shapefile. I want to get RMSE (Root Mean Square Error) from ...
0
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0answers
68 views

Time series linear interpolation method for cloud not processing properly in my MODIS dataset

I am trying to perform an interpolation to my 3D array (sub-block of MODIS time series dataset with a shape of (46,960,960)) using numpy linear interpolation method to replace cloud pixels with ...
2
votes
1answer
983 views

Interpolating heights in DEM using ArcGIS API's in C# [duplicate]

I am new to ArcGIS and not familiar with it. I want to interpolate heights in a DEM file using ArcGIS? Is it possible? Actually, I want to write a C# code that will read the height from DEM file for ...