Questions tagged [focal-statistics]
Focal Statistics (Spatial Analyst), calculates for each input cell location a statistic of the values within a specified neighbourhood around it.
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Circular focal means with raster and NAs
I am trying to understand circular focal means using rasters having NA values. I made a couple of scenarios to better understand how to combine weight matrices and functions to summarize values. I am ...
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Fill gaps in a categorical image with neighbors values in GEE
I'm reclassifying a DEM asset into 6 categories. However, there are some pixels that don't meet my criteria and are null. I would like to find a way to fill these gaps depending on its area and its ...
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Seeking global projection suitable for raster preserving equal area
I have a global tif file in epsg:4326 and a shapefile of points distributed around the global.
I want to retrieve the sum of the value of pixels around 10km of each point.
One obvious thing to do is ...
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Creating custom statistic type for use in focal statistics in ArcGIS Pro
I am trying to analyze raster data using a moving window. I am doing this in ArcGIS Pro, but at this point I'm getting stuck on how to use the formula I need as the statistic type of the moving window....
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Calculate auto covariant term using focal function from raster package
I want to calculate the auto covariant by myself. At this point I found the function focal from raster package. Here I show I proceeded :
glm_BEF_AUTO <- glm(as.formula (MODEL_FORM) ,family = ...
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How to supply a weight matrix to focal_hpc in R
I'm using the function focal_hpc from spatial.tools in R to compute for each cell of a raster the average value (mean function) around windows of a specific size (3 cells x 3 cells).
I used to perform ...
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Defining neighborhood settings in Focal Statistics with Calculate Value using ModelBuilder
I am using ArcGIS Desktop 10.6 with Spatial Analyst.
I use ModelBuilder, and I created a model with focal statistic. There are 2 different workflows now.
calculate the radius value: This value ...
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Focal regression 3x3 group of cells
I have two raster with same resolution and dimension: water-occurrence index and rainfall (mm). I want to create a new raster of SLOPE (a) and INTERCEPT (b) by performing linear regression between ...
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Saving focal statistics in memory using ArcPy?
I'm currently working on a project where I have written a script that is suppose to do several things. one of these is creating a "quick" focal statistics, from which I extract the values to some ...
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Focal statistics using geodesic distance in ArcGIS Desktop?
I need to compute focal statistics (sum, mean etc.) for raster data spanning the whole globe. I want to use a constant radius e.g. 100km around each cell.
However the data are geographic (WGS84), so ...
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Change map unit for focal statistics
I have around 1000 GPS Points and want to calculate the average value of Night lights, within a 10 km radius in ArcGis. My first approach was to do this with buffers, but a lot of polygons overlap and ...
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ArcGIS Focal Statistics Circular Radius Bug Work-Around
I am attempting to run focal statistics on a Raster with a circular neighborhood of 3 cells (600m radius), using the statistics type "maximum". Focal statistics calculates a seemingly nonsensical ...
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Performing neighborhood analysis?
I have a point map of trees along with their size (diameter) as an attribute and I want to create a raster that with the output of a neighborhood analysis
.
Basically for every point in a raster of ...
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How can I replicate focalmean with focal statistics
I am trying to get rid of some small gaps of no data in my rasters. I would previously have used focalmean but it is no longer available. I've tried what I expected to work but I'm getting errors.
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Calculating statistic for pixels within specified neighborhood in R
I have a raster with coded values of either 0 or 1. For each pixel, I want to calculate the percentage of 1s within a 500m radius. Using the focal() function in the terra package seems to be my best ...
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ArcPy calculating statistic for pixels within specified neighborhood
I'm using ArcGIS Pro and I need to calculate the proportion of pixels within 500m for a specified value. I have a raster with coded values of either 0 or 1. For each pixel, I want to calculate the ...
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Spatial Cross Correlation between two rasters
I have two raster data land cover and carbon monoxide, and I wish to perform correlation analysis on the two datasets. I found an article online describing the method using RStudio. I have followed ...
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Finding the minimum value cells orthogonally to a polyline
I have a raster (rast) and polyline (poly) as shown below with the corresponding data. For all the cells that line passes through, I want to find the minimum value among the cells that are located on ...
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How to increase the number of the adjacent cells of a focal cell?
I want to recover the adjacent cells around a focal cell, I could do it by using the function adjacent form the package « raster »,
cells_adj <- adjacent(Habitat[[1]], cells=cells_xy, directions=...
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Writing massive kernel files for focal statistics in ArcGIS Desktop
I would like to run focal statistics on a raster and apply a weighted kernel file.
The issue is that I have a dense raster (and I would like to keep it this way for a reason) on the other hand I am ...
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raster::focal fails on a selection of invalid row in R
I try to compute the proportion of 0 in an area of 30km around a given pixel.
The raster has a resolution of 100m and it is the map of France.
For this, I use the function focal() of the raster ...
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Modification of Line Density using ArcGIS Desktop?
I am using ArcGIS Desktop 10.1.
I need to calculate Line Density for polyline vector but the "Search radius" option must be replaced by something like the Neighborhood option in Focal Statistics.
I ...
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Selecting contiguous area with raster in ArcMap?
In ArcMap 10.4, I have created a slope raster from a DEM and am trying to select only contiguous areas of slope less than 10 degrees. I have used the raster calculator to select that subset of slopes (...
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