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Spatio-Temporal Geostatistics using gstat3 months ago
Introduction | Spatio-temporal dependence modelling and kriging | Application and illustration | Results and discussion | Conclusions | Acknowledgements | Appendix
stars proxy objects 4 months ago
Preamble: the starsdata package | Reading chunks, change resolution, select bands | Reading a particular chunk | Reading at a different resolution | Stars proxy objects | Methods for stars proxy objects | Select attributes | Select an area | Lazy evaluation, changing evaluation order | Fetching the data | Plotting with changed evaluation order | Multi-resolution proxy objects
stars tidyverse methods 4 months ago
slice | filter | pull | mutate | select | geom_stars
vector-raster conversions, reprojection, warping 4 months ago
Rasterizing an sf vector object | Vectorizing a raster object to an sf object | Polygonizing | Exporting to points | Exporting to polygons | Switching between vector and raster in stars objects | Reprojecting a raster | Warping a raster
How raster functions map to stars functions 4 months ago
COMMENT LEGEND | Creating objects | Changing spatial extent and/or resolution of objects | Cell based computation | Spatial contextual computation | Model predictions | Data type conversion | Summarizing | Accessing values of objects | Plotting | Getting and setting dimensions | Computing row, column, cell numbers and coordinates
Statistical modelling with stars objects 4 months ago
Training and prediction with stars objects | stars objects as data.frames | Predict for stars objects | models fitted for every pixel | Linear regression on pixel time series | Unsupervised learners | Principal components | K-means clustering | Supervised learners | Random Forest land use classification | Parallel processing
Measurement units in R4 months ago
Abstract | Introduction | SI | Related work in R | UNIDATA's udunits library | Udunits versus the Unified Code for Units of Measure (UCUM) | Handling data with units in R: the units package | Discussion and conclusions | Acknowledgements | References
Units of Measurement for R Vectors: an Introduction4 months ago
Setting units, unit conversion | Unit conversion | Basic manipulations | Arithmetic operations | Unit simplification | Mathematical functions | Summary functions | Printing | Subsetting | Concatenation | Conversion to/from difftime | units in matrix objects | units objects in data.frames | Formatting | Plotting
Reading, Writing and Converting Simple Features 4 months ago
Reading and writing through GDAL | Using st_read | Using st_write | Guessing a driver for output | Dataset and layer reading or creation options | Reading and writing directly to and from spatial databases | Conversion to other formats: WKT, WKB, sp | Conversion to and from well-known text | Conversion to and from well-known binary | Conversion to and from sp
Manipulating Simple Feature Geometries 4 months ago
Type transformations | For single geometries | For collections of geometry (sfc) and simple feature collections (sf) | Affine transformations | Coordinate reference systems conversion and transformation | Getting and setting coordinate reference systems of sf objects | Coordinate reference system transformations | Geometrical operations | Unary operations | Binary operations: distance and relate | Binary logical operations: | Operations returning a geometry
Manipulating Simple Features 4 months ago
Subsetting feature sets | Aggregating or summarizing feature sets | Joining two feature sets based on attributes | Joining two feature sets based on geometries
Plotting Simple Features 4 months ago
Plot methods for sf and sfc objects | Geometry only: sfc | Geometry with attributes: sf | Color key place and size | Class intervals | How does sf project geographic coordinates? | Graticules | Plotting sf objects with other packages | grid: st_as_grob | ggplot2 | mapview | tmap
Simple Features for R 4 months ago
What is a feature? | Dimensions | Simple feature geometry types | Coordinate reference system | How simple features in R are organized | sf: objects with simple features | sfc: simple feature geometry list-column | Mixed geometry types | sfg: simple feature geometry | Well-known text, well-known binary, precision | WKT and WKB | Precision | Reading and writing | Driver-specific options | Create, read, update and delete | Connection to spatial databases | Coordinate reference systems and transformations | Conversion, including to and from sp | Geometrical operations | Non-simple and non-valid geometries | Units | How attributes relate to geometries
trajectories: Classes and Methods for Trajectory Data5 months ago
Introduction | Setup and definition | Classes and methods | Simulation and model fitting | Exploratory data analysis | Summary and discussion
Introduction to Spatio-Temporal Variography5 months ago
Introduction | Variography | Spatio-temporal prediction
sp: classes and methods for spatial data5 months ago
Introduction | Spatial data classes | Manipulating spatial objects | Spatial points | Grids | Lines | Polygons | Importing and exporting data
Spherical geometry in sf using s2geometry 6 months ago
Introduction | Projected and geographic coordinates | Fundamental differences | Polygons on $S^2$ divide the sphere in two parts | Semi-open polygon boundaries | Bounding cap, bounding rectangle | Switching between S2 and GEOS | Measures | Area | Length | Distances | Predicates | Transformations | Buffers | st_buffer or st_is_within_distance? | References
introduction 1 years ago
Reading a satellite image | Switching attributes to dimensions and back | Subsetting | Overviews | Reading a raster time series: NetCDF | Reading datasets from multiple files | Writing stars objects to disk | Cropping a raster's extent | Vector data cube example | OD: space x space x travel mode x time x time | Extracting at point locations, aggregating over polygons
stars data model 1 years ago
Stars objects | Grid type | Regular grids | Raster attributes, rotated and sheared grids | Rectilinear grids | Curvilinear grids
sp Gallery1 years ago
Plotting maps with sp | Loading data and packages | Using base plot | Graticules | Other spatial objects in base plot | using lattice plot (spplot) | maps using ggplot2 | Interactive maps: leaflet, mapview | SessionInfo
Customising spatial data classes and methods2 years ago
Programming with classes and methods | Animal track data in package trip | Multi-point data: SpatialMultiPoints | Spatio-temporal grids | Analysing spatial Monte Carlo simulations
Miscellaneous 2 years ago
What is this EPSG code all about? | Why should we use OGC:CRS84 instead of EPSG:4326? | How does sf deal with secondary geometry columns? | Does st_simplify preserve topology? | Why do my dplyr verbs not work for sf objects?
sp evolution status: examples of migration from retiring packages3 years ago
sp evolution status | Use of sp affected functions and methods | Possible difficulties | Why not terra?
Testing packages using CRS objects3 years ago
Introduction
spacetime: Spatio-Temporal Data in R3 years ago
Introduction | How spatio-temporal data are recorded in tables | Space-time layouts | Classes and methods for spatio-temporal data | Graphs of spatio-temporal data | Spatial footprint or support, time intervals, moving objects | Worked examples | Further material | Discussion
NetCDF Proxy Workflows 4 years ago
The meuse data set: a tutorial for the gstat R package4 years ago
Introduction | R geostatistics packages | Spatial data frames | Spatial data on a regular grid | Variograms | Kriging | Conditional simulation | Directional variograms | Variogram maps | Cross variography
Hexagon Binning7 years ago
Overview | Theory and Algorithm | Basic Hexagon Binning Functions | Extended Hexagon Functions | Example: cDNA Chip Normalization | Manipulating Hexbins
Spatio-temporal objects to proxy a PostgreSQL table9 years ago
Introduction | Setting up a database | A proxy class | Selection based on time period and/or region | Closing the database connection | Limitations and alternatives
Spatio-temporal overlay and aggregation10 years ago
Introduction | Overlay with method over | Spatio-temporal overlay with method over | Aggregating spatio-temporal data
The pairwise relative semivariogram11 years ago
Introduction | Verification with plain R code | Verification with GSLIB
Overview of the intervals package.12 years ago
1 Introduction | 2 Interpretation of objects | 3 Floating point and intervals over R | 4 Notes on implementation | 5 Session information
Subsetting of spacetime objects12 years ago
Introduction | Selection over space | Selection over time | Selection over space and time