Provides a minimal R and C++ API for parsing well-known binary and well-known text representation of geometries to and from R-native formats. Well-known binary is compact and fast to parse; well-known text is human-readable and is useful for writing tests. These formats are useful in R only if the information they contain can be accessed in R, for which high-performance functions are provided here.
PostGIS is an extension to the PostgreSQL object-relational database system which allows GIS (Geographic Information Systems) objects to be stored in the database. PostGIS includes support for GiST-based R-Tree spatial indexes, and functions for analysis and processing of GIS objects. This is the manual for version 3.5.4dev This work is licensed under a Creative Commons Attribution-Share Alike 3.0 License. Feel free to use this material any way you like, but we ask that you attribute credit to the PostGIS Project and wherever possible, a link back to https://postgis.net.
Tools for the analysis of land use and cover (LUC) time series. It
includes support for loading spatiotemporal raster data and synthesized
spatial plotting. Several LUC change (LUCC) metrics in regular or irregular
time intervals can be extracted and visualized through one- and multistep
sankey and chord diagrams. A complete intensity analysis according to
Aldwaik and Pontius (2012) is
implemented, including tools for the generation of standardized multilevel
output graphics.
LandApp is the ultimate real estate tool to assess properties nationwide. Access ownership data, property evaluations, and listings — all for just $6/month.
Garnish/decorate leaflet or mapview maps. — garnishMap
This function provides a versatile interface to add components to a
leaflet or mapview map. It takes functions such as "addMouseCoordinates"
or addLayersControl and their respective arguments and adds
them to the map. Arguments must be named. Functions can be plain or
character strings.
Add static labels to leaflet or mapview objects — addStaticLabels
Being a wrapper around addLabelOnlyMarkers, this
function provides a smart-and-easy solution to add custom text labels to an
existing leaflet or mapview map object.
Add a reactive layer to map. — addReactiveFeatures
This function adds a layer to a map that is dependent on another layer.
The reactive layer will be shown/hidden when holding the Ctrl-button on your
keyboard and performing the action defined by on. on can be
either "click" (default) or "mouseover".
Note: srcLayer needs to be added to the map using addGeoJSON
because we need to be able to link the two layers by a common attribute
defined by argument by. Linking will be done via group name
of srcLayer.
Generating a downloadable Quarto document from a shiny app on shinyapps.io
The following shiny app is intended pass user inputs from the app into a parameterized html quarto document that, when rendered, is downloaded via downloadHandler() and downloadButton(). This reproducible example works perfectly when deployed locally, but not when hosted on shinyapps.io. My understanding is that the quarto::quarto_render() call should have permission to write a file on shinyapps.io (it wouldn't be persistent from instance to instance, but that's fine). Does shinyapps.io not supp...