The field of study concerning statistical methods that use space and spatial relationships (such as distance, area, volume, length, height, orientation, centrality and/or other spatial characteristics of data) directly in their mathematical computations.
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20 views
Calculate complete spatial randomness using Python [duplicate]
I currently use the csr() function from Splancs for R (http://cran.r-project.org/web/packages/splancs/splancs.pdf) to calculate complete spatial randomness (CSR) points to be used for spatial ...
2
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1answer
60 views
About regression analysis in arcgis
I'm trying to do regression analysis using a shapefile which contains dependent variable (NDVI) and explanatory variable (prec) in Arcgis. First, I run GWR analysis and then run spatial ...
1
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1answer
36 views
Assigning value to a field on a layer based on spatial query with another layer
I want to assign a value to a field of a polygon layer based on the value of a field on another polygon layer, using a spatial query.
My first polygon layer contains buildings and the second contains ...
4
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0answers
67 views
Assigning costs to a road network : use raster or vector?
I have a road network in a PostGis database (db_routing). In another database (db_environment), I have some spatial features of the surrounding environment (trees as points and water bodies as ...
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0answers
14 views
Raster pixel calculator [duplicate]
I have used model builder to calculate a site suitability raster using the weighted overlay tool. I now have a site suitability raster and I have to pick one of four polygons that overlay the raster ...
4
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1answer
65 views
How to determine correlation between two databases?
I need to perform some tests and verifications on databases and/or datasets.
I need for example to analyze two databases and then determine if there is enough correlation between both.
My main issue ...
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0answers
37 views
Plotting time-series data in ArcGIS
I'm attempting to produce interpolated plots of water quality time-series data from ArcSDE. This is the data format:
OID WELL_ID WELL_NAME SAMPLE_ID SAMPLE_DAT PARAM RESULT
...
5
votes
1answer
85 views
Comparison of three contour lines
I am looking for a way to spatially quantify the difference between three contour line shapefiles. More specifically, I have two elevation rasters which I intend to create contour lines from, but ...
1
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1answer
72 views
Why won't Tabulate Intersection work?
I can't seem to find much in forums about this - I'm trying to use Tabulate Intersection with two shapefiles.
When run in a model, I get a generic error (Error 999999:Error executing function).
...
2
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1answer
62 views
Raster export for regressions analysis
I have the following issue:
I am trying to do a regression analysis between the (z) values of two rasters. What I would ideally like to have is the raster output not as grid but rather a list of ...
9
votes
3answers
193 views
Calculating mean slope: Harmonic or Arithmetic Mean?
I have to calculate the average upslope percent slope for a large dataset, the basic method is detailed here. However, I've begun to wonder if harmonic mean might be more appropriate than the ...
7
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1answer
93 views
(How) do the modifiable areal unit problem and modifiable temporal unit problem interact?
I am reconstructing historical time series of land use and other related data from a variety of sources with different spatial and temporal resolutions and would be interested in what possible ...
5
votes
1answer
169 views
Creating a subset of points shapefile with minimum distance between points in ArcGIS 10 [duplicate]
I have a sample of ~700 animal locations that I will be using for habitat selection analysis. I am trying to figure out a way to subsample my locations in a way that will maximize my sample size for ...
3
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0answers
78 views
How does Zonal statistics handle pixels that are on the border of the polygon?
I am using the plugin zonal statistics to calculate the sum of the raster cells within polygons. How does this plugin handle pixels that are on the border of the polygon, are those cell values ...
6
votes
1answer
69 views
What does shading indicate in home range plot?
I've simulated a home range in R using the clusthr function from the adehabitatHR package. The home range is made from 50 x,y coordinates. The output is attached.
I'm trying to get clear on what ...