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4
votes
0answers
31 views

Interpolating species data from sample points in a small area

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 ...
3
votes
1answer
64 views

How do I iterate a model over multiple fields using ModelBuilder?

I have built a model to interpolate air pollution from 40 recording stations using IDW. The results are then exported to an average for census divisions. I need to repeat this process hundreds of ...
0
votes
0answers
18 views

Interpolating points to surface not working

I am trying to create a surface from points using IDW interpolation. Have tried both 3D analyst and Spatial Analyst tool with my selected xyz data sheet. It appears to process and I don't get an error ...
0
votes
1answer
30 views

Parameters for optimizing interpolation in ArcGIS for Desktop?

Is there any criteria to know the most proper parameters for an interpolation method in ArcGIS (such as, for IDW: Neighbors (min and max), sector type, semiaxis length, angle, search neighborhood)? ...
2
votes
1answer
27 views

Cross-validation and optimal p power in IDW

I use the "Geostatistical Wizard" in ArcMap 10 to do my interpolations. For example, when I do IDW and I want to decide for the optimal p power or the optimal number of neighbors that will contribute ...
-2
votes
1answer
257 views

Creating a python script to import an excel spreadsheet, create shapefile and do some analysis [closed]

I am trying to write a script that does the following. Imports an xls file containing x, y, and other columns with data. I want to make this into a point shape file. I want to take that point ...
0
votes
2answers
79 views

Cell Size parameter for IDW (Spatial Analyst) tool

I am attempting to use the IDW (Spatial Analyst) tool in a Python script however I am a bit confused on what to put for the "Cell Size" optional parameter. When using the tool within ArcMap it seems ...
2
votes
2answers
78 views

How to interpolate population data?

I have population data (inhabitants per city and year) of 31 cities of the DR Congo for the years 1960, 1970, 1980 and 1990. I want to interpolate the population of all cities for the year 1990, to ...
1
vote
2answers
70 views

How to perform IDW interpolation and mean estimation on county level using ArcGIS for Desktop?

I am absolutely new to GIS. I have imported a map with information in the counties of Germany. Additionally I have added a layer with information on SO2 concentration at various measuring stations in ...
1
vote
1answer
43 views

How to export a IDW raster while keeping the search radius data

I want to export my IDW rasters that I made in ArcGIS to QGIS, however when I export my raster, the values are there but are no longer displayed. They are stored within each cell and are not ...
1
vote
3answers
221 views

Which interpolation method for noise mapping?

I want to create a noise map with measured point data. But i want to have a planar representation, so I need an interpolation method. Which one is the 'best' one for measured noise data? I prefer to ...
1
vote
1answer
63 views

Problems with IDW Tool in ArcGIS

Everytime I use the IDW it doesnt visualize the Interpolation. It is calculating everything properly but there is nothing shown on the screen. i did everything i have to do in the enviroments raster ...
3
votes
2answers
327 views

What's wrong with my IDW interpolation function (Python)?

Original Question Can anyone see what's wrong with my custom IDW interpolation below? I know there are existing libraries that can do this for me, but for various reasons including educational and ...
1
vote
2answers
84 views

Iterating through z-values in ModelBuilder

I have a series of fields that I am trying to run the IDW tool against. I'm looking for a way iterate through the feature class, using a different field as the z value each time. This is my data: ...
7
votes
1answer
1k views

When to use IDW vs Kriging Interpolation for DEM creation?

I'm trying to create a DEM using point data spaced very regularly about 10m apart. The area I am interpolating is an educational facility with many flat parking lots and football fields but still has ...