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Eric Book
@erc_bk@fosstodon.org  ·  activity timestamp 12 hours ago

How spatial sampling methods affect the variance of your mean estimate when spatial autocorrelation is present.
https://dosull.github.io/posts/2025-11-14-gia-chapter-2A-spatial-autocorrelation/
#rstats #rspatial

Shows four density charts. Each chart represents a sampling method: poisson, grid, evenly spaced, and clustered.. Each chart shows two densities: random (no spatial autocorrelation) and smoothed (spatial autocorrelation). Grid and evenly spaced show too narrow variance estimates while clustered shows too wide of a variance estimate.
Shows four density charts. Each chart represents a sampling method: poisson, grid, evenly spaced, and clustered.. Each chart shows two densities: random (no spatial autocorrelation) and smoothed (spatial autocorrelation). Grid and evenly spaced show too narrow variance estimates while clustered shows too wide of a variance estimate.
Shows four density charts. Each chart represents a sampling method: poisson, grid, evenly spaced, and clustered.. Each chart shows two densities: random (no spatial autocorrelation) and smoothed (spatial autocorrelation). Grid and evenly spaced show too narrow variance estimates while clustered shows too wide of a variance estimate.
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Eric Book
@erc_bk@fosstodon.org  ·  activity timestamp 12 hours ago

How spatial sampling methods affect the variance of your mean estimate when spatial autocorrelation is present.
https://dosull.github.io/posts/2025-11-14-gia-chapter-2A-spatial-autocorrelation/
#rstats #rspatial

Shows four density charts. Each chart represents a sampling method: poisson, grid, evenly spaced, and clustered.. Each chart shows two densities: random (no spatial autocorrelation) and smoothed (spatial autocorrelation). Grid and evenly spaced show too narrow variance estimates while clustered shows too wide of a variance estimate.
Shows four density charts. Each chart represents a sampling method: poisson, grid, evenly spaced, and clustered.. Each chart shows two densities: random (no spatial autocorrelation) and smoothed (spatial autocorrelation). Grid and evenly spaced show too narrow variance estimates while clustered shows too wide of a variance estimate.
Shows four density charts. Each chart represents a sampling method: poisson, grid, evenly spaced, and clustered.. Each chart shows two densities: random (no spatial autocorrelation) and smoothed (spatial autocorrelation). Grid and evenly spaced show too narrow variance estimates while clustered shows too wide of a variance estimate.
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Matthieu Viry boosted
Krzysztof Dyba
@krzysztof_dyba@fosstodon.org  ·  activity timestamp 4 days ago

GDAL is not only a tool for handling various geospatial data formats. The new version introduces support for many geoprocessing tools, including:

- raster algebra,
- raster reclassification,
- focal and zonal statistics,
- multi-stage pipelines,
- and much more!

Check out the details here: https://gdal.org/en/release-3.12/programs/index.html#gdal-application (note, this is still experimental).

#rspatial #gischat #gdal

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Krzysztof Dyba
@krzysztof_dyba@fosstodon.org  ·  activity timestamp 4 days ago

GDAL is not only a tool for handling various geospatial data formats. The new version introduces support for many geoprocessing tools, including:

- raster algebra,
- raster reclassification,
- focal and zonal statistics,
- multi-stage pipelines,
- and much more!

Check out the details here: https://gdal.org/en/release-3.12/programs/index.html#gdal-application (note, this is still experimental).

#rspatial #gischat #gdal

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Sharon Machlis boosted
Jakub Nowosad
@nowosad@fosstodon.org  ·  activity timestamp 3 months ago

📦 New R package: sfhotspot by Matt Ashby

Identify & analyze spatial clusters of points (places/events) entirely with sf objects.
Includes tools for counts, change over time, kernel density, Getis–Ord Gi*, & classification.

🔗 GitHub: https://github.com/mpjashby/sfhotspot

#RStats#GISchat#Geocomputation#RSpatial

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Jakub Nowosad
@nowosad@fosstodon.org  ·  activity timestamp 3 months ago

📦 New R package: sfhotspot by Matt Ashby

Identify & analyze spatial clusters of points (places/events) entirely with sf objects.
Includes tools for counts, change over time, kernel density, Getis–Ord Gi*, & classification.

🔗 GitHub: https://github.com/mpjashby/sfhotspot

#RStats#GISchat#Geocomputation#RSpatial

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Alex boosted
Jakub Nowosad
@nowosad@fosstodon.org  ·  activity timestamp 4 months ago

New R package: rgeomorphon 📦 by Andrew Brown

Classifies terrain forms using a parallel C++ implementation of the geomorphon algorithm.

🔗 https://github.com/brownag/rgeomorphon

#RStats#GIS#TerrainAnalysis#RemoteSensing#RSpatial

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Jakub Nowosad
@nowosad@fosstodon.org  ·  activity timestamp 4 months ago

New R package: rgeomorphon 📦 by Andrew Brown

Classifies terrain forms using a parallel C++ implementation of the geomorphon algorithm.

🔗 https://github.com/brownag/rgeomorphon

#RStats#GIS#TerrainAnalysis#RemoteSensing#RSpatial

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