R packages by hypertidy

geodist - Fast, Dependency-Free Geodesic Distance Calculations

Dependency-free, ultra fast calculation of geodesic distances. Includes the reference nanometre-accuracy geodesic distances of Karney (2013) <doi:10.1007/s00190-012-0578-z>, as used by the 'sf' package, as well as Haversine and Vincenty distances. Default distance measure is the "Mapbox cheap ruler" which is generally more accurate than Haversine or Vincenty for distances out to a few hundred kilometres, and is considerably faster. The main function accepts one or two inputs in almost any generic rectangular form, and returns either matrices of pairwise distances, or vectors of sequential distances.

Last updated 2 months ago

92 stars 5.33 score 0 dependencies 29 dependents

PROJ - Generic Coordinate System Transformations Using 'PROJ'

A wrapper around the generic coordinate transformation software 'PROJ' that transforms coordinates from one coordinate reference system ('CRS') to another. This includes cartographic projections as well as geodetic transformations. The intention is for this package to be used by user-packages such as 'reproj', and that the older 'PROJ.4' and version 5 pathways be provided by the 'proj4' package.

Last updated 2 months ago

16 stars 4.49 score 5 dependencies 23 dependents

vapour - Access to the 'Geospatial Data Abstraction Library' ('GDAL')

Provides low-level access to 'GDAL' functionality. 'GDAL' is the 'Geospatial Data Abstraction Library' a translator for raster and vector geospatial data formats that presents a single raster abstract data model and single vector abstract data model to the calling application for all supported formats <https://gdal.org/>. This package is focussed on providing exactly and only what GDAL does, to enable developing further tools.

Last updated 1 months ago

cppgdalgdal-api

80 stars 4.28 score 4 dependencies 5 dependents

crsmeta - Extract Coordinate System Metadata

Obtain coordinate system metadata from various data formats. There are functions to extract a 'CRS' (coordinate reference system, <https://en.wikipedia.org/wiki/Spatial_reference_system>) in 'EPSG' (European Petroleum Survey Group, <http://www.epsg.org/>), 'PROJ4' <https://proj.org/>, or 'WKT2' (Well-Known Text 2, <http://docs.opengeospatial.org/is/12-063r5/12-063r5.html>) forms. This is purely for getting simple metadata from in-memory formats, please use other tools for out of memory data sources.

Last updated 4 years ago

5 stars 4.15 score 0 dependencies 31 dependents

ceramic - Download Online Imagery Tiles

Download imagery tiles to a standard cache and load the data into raster objects. Facilities for 'AWS' terrain <https://registry.opendata.aws/terrain-tiles/> terrain and 'Mapbox' <https://www.mapbox.com/> servers are provided.

Last updated 5 months ago

92 stars 4.14 score 34 dependencies

reproj - Coordinate System Transformations for Generic Map Data

Transform coordinates from a specified source to a specified target map projection. This uses the 'PROJ' library directly, by wrapping the 'PROJ' package which leverages 'libproj', otherwise the 'proj4' package. The 'reproj()' function is generic, methods may be added to remove the need for an explicit source definition. If 'proj4' is in use 'reproj()' handles the requirement for conversion of angular units where necessary. This is for use primarily to transform generic data formats and direct leverage of the underlying 'PROJ' library. (There are transformations that aren't possible with 'PROJ' and that are provided by the 'GDAL' library, a limitation which users of this package should be aware of.) The 'PROJ' library is available at <https://proj.org/>.

Last updated 2 months ago

3 stars 3.84 score 8 dependencies 22 dependents

anglr - Mesh Topology and Visualization for Spatial Data

Gives direct access to generic 3D tools and provides a full suite of mesh-creation and 3D plotting functions. By extending the 'rgl' package conversion and visualization functions for the 'mesh3d' class a wide variety of complex spatial data can be brought into 3D scenes. These tools allow for spatial raster, polygons, and lines that are common in 'GIS' contexts to be converted into mesh forms with high flexibility and the ability to integrate disparate data types. Vector and raster data can be seamlessly combined as meshes, and surfaces can be set to have material properties based on data values or with image textures. Textures and other data combinations use projection transformations to map between coordinate systems, and objects can be easily visualized in an interactive scene at any stage. This package relies on the 'RTriangle' package for high-quality triangular meshing which is licensed restrictively under 'CC BY-NC-SA 4.0'.

Last updated 2 years ago

83 stars 3.76 score 78 dependencies

silicate - Common Forms for Complex Hierarchical and Relational Data Structures

Generate common data forms for complex data suitable for conversions and transmission by decomposition as paths or primitives. Paths are sequentially-linked records, primitives are basic atomic elements and both can model many forms and be grouped into hierarchical structures. The universal models 'SC0' (structural) and 'SC' (labelled, relational) are composed of edges and can represent any hierarchical form. Specialist models 'PATH', 'ARC' and 'TRI' provide the most common intermediate forms used for converting from one form to another. The methods are inspired by the simplicial complex <https://en.wikipedia.org/wiki/Simplicial_complex> and provide intermediate forms that relate spatial data structures to this mathematical construct.

Last updated 7 months ago

hierarchical-datasimplicial-complexspatial-datastructural-primitivestopologytriangulation

53 stars 3.71 score 23 dependencies 7 dependents

decido - Bindings for 'Mapbox' Ear Cutting Triangulation Library

Provides constrained triangulation of polygons. Ear cutting (or ear clipping) applies constrained triangulation by successively 'cutting' triangles from a polygon defined by path/s. Holes are supported by introducing a bridge segment between polygon paths. This package wraps the 'header-only' library 'earcut.hpp' <https://github.com/mapbox/earcut.hpp.git> which includes a reference to the method used by Held, M. (2001) <doi:10.1007/s00453-001-0028-4>.

Last updated 4 years ago

15 stars 3.60 score 1 dependencies 18 dependents

tabularaster - Tidy Tools for 'Raster' Data

Facilities to work with vector and raster data in efficient repeatable and systematic work flow. Missing functionality in existing packages is included here to allow extraction from raster data with 'simple features' and 'Spatial' types and to make extraction consistent and straightforward. Extract cell numbers from raster data and return the cells as a data frame rather than as lists of matrices or vectors. The functions here allow spatial data to be used without special handling for the format currently in use.

Last updated 7 months ago

49 stars 3.14 score 37 dependencies

ncmeta - Straightforward 'NetCDF' Metadata

Extract metadata from 'NetCDF' data sources, these can be files, file handles or servers. This package leverages and extends the lower level functions of the 'RNetCDF' package providing a consistent set of functions that all return data frames. We introduce named concepts of 'grid', 'axis' and 'source' which are all meaningful entities without formal definition in the 'NetCDF' library <https://www.unidata.ucar.edu/software/netcdf/>. 'RNetCDF' matches the library itself with only the named concepts of 'variables', 'dimensions' and 'attributes'.

Last updated 4 months ago

11 stars 3.09 score 23 dependencies 9 dependents

whatarelief - Get topography elevation and online imagery data

Obtain elevation data, topography relief for any region on the Earth. Topography and bathymetry data is supported by default. Sensible defaults exist for usage, with a matrix of entire planet topography(and bathymetry) returned. The geographic extent can be modified (from whole-planet) to a simple region in longitude/latitude by 'xmin,xmax,ymin,ymax' range, or by specifying a grid exactly with extent, dimension, projection in generic or spatial formats ('terra' or 'raster'). Online sources for data are used, 'GEBCO' General Bathymetric Chart of the Oceans (GEBCO) as a background (to ~500m resolution), and Copernicus GLO-30 Digital Elevation Model for higher resolution (to ~30m resolution). Custom source/s of topography may be input to override defaults, links to file/s or URLs as required.

Last updated 6 months ago

cloudonlinerasterspatial

47 stars 2.89 score 32 dependencies

unjoin - Separate a Data Frame by Normalization

Separate a data frame in two based on key columns. The function unjoin() provides an inside-out version of a nested data frame. This is used to identify duplication and normalize it (in the database sense) by linking two tables with the redundancy removed. This is a basic requirement for detecting topology within spatial structures that has motivated the need for this package as a building block for workflows within more applied projects.

Last updated 4 years ago

12 stars 2.64 score 16 dependencies 8 dependents

quadmesh - Quadrangle Mesh

Create surface forms from matrix or 'raster' data for flexible plotting and conversion to other mesh types. The functions 'quadmesh' or 'triangmesh' produce a continuous surface as a 'mesh3d' object as used by the 'rgl' package. This is used for plotting raster data in 3D (optionally with texture), and allows the application of a map projection without data loss and many processing applications that are restricted by inflexible regular grid rasters. There are discrete forms of these continuous surfaces available with 'dquadmesh' and 'dtriangmesh' functions.

Last updated 2 years ago

25 stars 2.40 score 31 dependencies 1 dependents

graticule - Meridional and Parallel Lines for Maps

Create graticule lines and labels for maps. Control the creation of lines or tiles by setting their placement (at particular meridians and parallels) and extent (along parallels and meridians). Labels are created independently of lines.

Last updated 7 months ago

18 stars 2.15 score 15 dependencies

gdalio - Read Data to via GDAL Warper to an Assumed Grid

Convenience wrapper for the GDAL raster warper library. Set a default context grid, an extent, dimension, projection, and then read any GDAL raster source into that grid. There are controls to augment metadata-poor sources (to override missing or incorrect extent or projection metadata), to set a desired grid for subsequent use, and ability to control options available by the GDAL warp library itself. This can be used to easily read data from any kind of raster data source, local files, online servers, bare URLs, and database connections. Data is read in generic form but we provide example wrappers for commonly used formats for raster data.

Last updated 2 years ago

27 stars 2.09 score 9 dependencies

lazysf - Delayed Read for 'GDAL' Vector Data Sources

Lazy read for drawings. A 'dplyr' back end for data sources supported by 'GDAL' vector drivers, that allows working with local or remote sources as if they are in-memory data frames. Basic features works with any drawing format ('GDAL vector data source') supported by the 'sf' package.

Last updated 7 months ago

spatial-gdal-sf-dbi

19 stars 2.05 score 35 dependencies

lazyraster - Generate Raster Data Lazily from 'GDAL'

Read raster data at a specified resolution on-demand via 'GDAL' (the Geospatial Data Abstraction Library <https://gdal.org/>). Augments the 'raster' package by never reading data from a raster source until necessary for generating an in-memory 'raster' object. A 'lazyraster' object may be cropped and converted to 'raster' object, and by default will only read a small amount of data sufficient for an overall summary. The amount of data read can be controlled by specifying the output dimensions.

Last updated 3 years ago

26 stars 2.05 score 35 dependencies

ncdump - Extract Metadata from 'NetCDF' Files as Data Frames

Tools for handling 'NetCDF' metadata in data frames. The metadata is provided as relations in tabular form, to avoid having to scan printed header output or to navigate nested lists of raw metadata.

Last updated 7 years ago

3 stars 1.76 score 17 dependencies

tissot - The Tissot Indicatrix

Create and plot the Tissot Indicatrix.

Last updated 7 months ago

17 stars 1.75 score 16 dependencies

affinity - Raster Georeferencing, Grid Affine Transforms, Cell Abstraction

Tools for raster georeferencing, grid affine transforms, and general raster logic. These functions provide converters between raster specifications, world vector, geotransform, 'RasterIO' window, and 'RasterIO window' in 'sf' package list format. There are functions to offset a matrix by padding any of four corners (useful for vectorizing neighbourhood operations), and helper functions to harvesting user clicks on a graphics device to use for simple georeferencing of images. Methods used are available from <https://en.wikipedia.org/wiki/World_file> and <https://gdal.org/user/raster_data_model.html>.

Last updated 3 years ago

14 stars 1.71 score 14 dependencies

area - Calculate Area of Triangles and Polygons

Calculate the area of triangles and polygons using the shoelace formula. Area may be signed, taking into account path orientation, or unsigned, ignoring path orientation. The shoelace formula is described at <https://en.wikipedia.org/wiki/Shoelace_formula>.

Last updated 6 months ago

12 stars 1.70 score 1 dependencies

guerrilla - Illustrate Various Methods of Interpolation for Irregular Data

Examples of interpolating irregular data, to illustrate the mechanics of various methods and some easy tools to run them.

Last updated 7 months ago

15 stars 1.69 score 5 dependencies

vaster - Tools for Raster Grid Logic

Provides raster grid logic, the grid operations that don't require access to materialized data, i.e. most of them. Grids are arrays with dimension and extent, and many operations are functions of just the dimension 'nrows', 'ncols' or a combination of the dimension and the extent 'xmin', 'xmax', 'ymin', 'ymax'. Here we provide direct access to this logic without need for connection to any materialized data or formats. Grid logic includes functions that relate the cell index to row and column, or row and column to cell index, row, column or cell index to position. Cell index, and row,column posiiton exist independently of any other use of a raster grid.

Last updated 3 months ago

raster

7 stars 1.64 score 0 dependencies 2 dependents

8 stars 1.16 score 1 dependencies

polymer - Flexible and Intuitive Overlay Methods

General intersections via a triangle pool from disparate polygon inputs. Overlap is determined via finite-element decomposition of all component edges in all inputs into triangles. Then triangles instances are classified (by point-in-polygon lookup) by objects within layers.

Last updated 7 months ago

7 stars 1.00 score 41 dependencies

grout - Create Raster Tiles

Create raster tiles abstractly.

Last updated 9 days ago

5 stars 0.82 score 12 dependencies

quad - Intermediate Forms of Raster Grids

Raster grids and quads as first class types with helpers. Provides a low level API for generating mesh index and vertices from the simplest abstraction of raster grid, input dimension and (optionally) extent to generate components of meshes for downstream visualization and efficient coordinate transformation. API functions may be 'Linked To' in the R headers library way.

Last updated 7 months ago

gridmeshquadraster

1 stars 0.82 score 1 dependencies 1 dependents

scgraph - Common Forms for Graph Structures

wince - Write NetCDF Files for the Obvious Situations

Create a 3D 'NetCDF' with time or depth as the third dimension, and convention-conforming coordinate system metadata. Eventually we'll set this up to write slice by slice which is easy once the file is instantiated, but atm it's purely an experiment. We might include capability to create 4D ones too.

Last updated 2 years ago

3 stars 0.36 score 19 dependencies

clipper - Another Port of Angus Johnson's 'clipper' Polygon Clipping Library